AU2013365703A1

AU2013365703A1 - Junction cap member, plaster board retaining system and kit therefor

Info

Publication number: AU2013365703A1
Application number: AU2013365703A
Authority: AU
Inventors: Graham James BREWSTER; Jonathan Bakker CHAPMAN
Original assignee: Fletcher Building Holdings Ltd
Current assignee: Fletcher Building Holdings Ltd
Priority date: 2012-12-20
Filing date: 2013-12-19
Publication date: 2015-07-02
Also published as: WO2014097197A1

Abstract

A plasterboard panel cladding kit for surfacing a wall construction comprising a plurality of parallel straight elongate studs spaced apart at a distance from each other. The kit comprises a plurality of planar plasterboard panels rectangular in plan shape and each comprising a first pair of parallel opposed edges and a second pair of parallel opposed edges that are perpendicular to said first pair of opposed edges. Plasterboard panel retainers are provided each configured for extend between adjacent second pair of opposed edges of two plasterboard panels that are to be secured at, and in a manner so that said edges extend parallel the elongate direction of, a stud.

Description

WO 2014/097197 PCT/IB2013/061121 1 JUNCTION CAP MEMBER, PLASTER BOARD RETAINING SYSTEM AND KIT THEREFOR FIELD OF THE INVENTION 5 The present invention relates to a junction cap member and an associated retaining system. More particularly but not exclusively it relates to a junction cap member, a plasterboard panel retaining system and a kit therefor for mounting paper board panels to a construction frame. 10 BACKGROUND Plasterboard panels, also commonly known as wallboard, drywall, OR gypsum board, are panels made of gypsum plaster pressed between two thick sheets of paper. It is typically used as a cladding for interior walls and ceilings. Plasterboard panel construction has become prevalent as a speedier alternative 15 to traditional lath and plaster. As an alternative to a week-long plaster application, an entire house may be clad in plasterboard panel in one or two days by two experienced plasterboard panel fixers. During construction, the work of installing and finishing plasterboard panel is often split between the plasterboard panel installers, who install the plasterboard 20 panel, and the stoppers, who use stop and plaster to create a monolithic finish. The labour time required to install and finish the plasterboard cladding may result in increased costs of a project. Plasterboard panels are traditionally cut to size by scoring the paper on the front side with a knife, breaking the sheet along the cut, scoring the paper backing, 25 and finally breaking the sheet in the opposite direction. This procedure can cause jagged edges and potentially waste product. The jagged edges may present an undesirable appearance. Current practice is to secure the plasterboard panels to the wall studs or ceiling joists by means of fasteners penetrating through the plasterboard panels. Then the 30 seams between plasterboard panels are concealed using joint tape and several layers of stopping compound, as well as stopping compound being applied to all fastener holes in the plasterboard panels. Typically the process of applying stopping compound and sanding is repeated three times over the same area to build up a finished surface. The compound is allowed to air dry then typically sanded smooth before 35 painting. The applying of tape and compound, sanding, and repeating the process, then drying time, is disproportionally large compared to the time it takes to fix the WO 2014/097197 PCT/IB2013/061121 2 plasterboard panel. It is also difficult and may require labourers with specialised skills to get the compounded surface presentable and smoothly finished. OBJECT OF THE INVENTION 5 It is an object of the present invention to provide a junction cap and associated retaining system which overcomes or at least partially ameliorates some of the abovementioned disadvantages or which at least provides the public with a useful choice. 10 BRIEF DESCRIPTION OF THE INVENTION In a first aspect the present invention may broadly be said to be a junction cap member suitable for at least partly covering a junction between plasterboard panel edges that are at least partly retained to a building structure by at least one retaining member, said junction cap member comprising; 15 a. a body member configured to cover at least part of said junction; and b. at least one or more connector formations for operationally connecting the body member to said at least one retaining member to facilitate retention of said junction cap member with said at least one retaining member. Preferably the junction cap member is configured to be received by the 20 retaining member.. Preferably the junction cap member comprises a tab for handling.. Preferably the tab is frangible.. Preferably the junction cap member comprises one or more junction cap channel formations that, when in-situ, is located intermediate of edges of said 25 plasterboard panel at said junction. Preferably the junction cap channel extents across the junction cap member. Preferably the junction cap channel is not continuous along the junction cap member.. Preferably the junction cap member comprises a removable junction cap cover 30 for operationally covering and connectedly engaging at the junction cap channel. Preferably the junction cap cover comprises connector formations that are configured for connecting securely with the junction cap channel.. Preferably the junction cap member, retaining members and junction cap cover are composed of plastic.. 35 Preferably the junction cap member and junction cap cover are composed of moulded plastic..

WO 2014/097197 PCT/IB2013/061121 3 Preferably the junction cap member and junction cap cover are composed of injection moulded plastic.. Preferably the junction cap member is configured to operationally hide at the junction one or more of the inner retaining member and adjacent edges of the 5 plasterboard panels. Preferably the junction cap member is configured and adapted to cover at one predetermined junction selected from one or of the following: * a junction between two coplanar plasterboard panel corners against a surface or opening; 10 * a junction around a planar corner of an opening; * a junction between two corners of plasterboard panels aligned at right angles to each other at an internal corner, against a surface aligned at right angles to both of the plasterboard panels; * a junction between two corners of plasterboard panels aligned at right 15 angles to each other at an external corner, against a surface aligned at right angles to both plasterboard panels; * a junction between four coplanar plasterboard panel corners; * a junction between two coplanar plasterboard panel corners and an edge of a plasterboard panel; 20 0 a junction between a corner of a plasterboard panel and an internal cutaway corner in a coplanar plasterboard panel; * a junction between the corners of two coplanar plasterboard panels and a continuous edge of a coplanar skirting; * a junction between the corners of two plasterboard panels aligned at 25 right angles to each other at an internal corner against a skirting coplanar with each of the plasterboard panels; * a junction between the corners of a first set of two coplanar plasterboard panels with the corners of a second set of two coplanar plasterboard panels aligned at right angles to the first set of two coplanar plasterboard panels at an external corner; 30 0 a junction between the corners of a first set of two coplanar plasterboard panels with an edge of a plasterboard panel aligned at right angles to the first set of two coplanar plasterboard panels at an external corner; * a junction between a first plasterboard panel corner and a second plasterboard panel corner aligned at right angles to each other, with the inside corner 35 of a third plasterboard panel aligned at right angles to both the first plasterboard panel and the second plasterboard panel; WO 2014/097197 PCT/IB2013/061121 4 * an extended junction going down to the floor between two plasterboard panels aligned at right angles with each other at a floor; * a junction between the corners of a first two coplanar plasterboard panels, and the corners of a second two coplanar plasterboard panels extending at 5 right angles to the first two coplanar plasterboard panels; * a junction between the edges of two coplanar plasterboard panels and a plasterboard panel extending at right angles to said coplanar plasterboard panel; * a junction between the corners of three plasterboard panels each extending at right angles to each other at an internal corner; 10 0 a junction between the corners of three plasterboard panels each extending at right angles to each other at an external corner; and * a junction between the internal corners of two plasterboard panels at right angles to each other, and an internal corner in a plasterboard panel at right angles to the other two plasterboard panels. 15 In a further aspect the present invention may broadly be said to be a plasterboard panel retaining system comprising * at least one or more plasterboard panel retaining members configured for securing at least an edge of a plasterboard panel to a construction; and * at least one junction cap member configured and adapted for being 20 secured to said plasterboard panel retaining members; * wherein said junction cap member is configured and adapted to cover at least part of one junction of plasterboard panel edges; and * wherein the junction cap member is configured to engage securely with one or more of said one or more retaining members. 25 Preferably, the junction is selected from one of the following: * a junction between two coplanar plasterboard panel corners against a surface or opening; * a junction around a planar corner of an opening; * a junction between two corners of plasterboard panels aligned at right 30 angles to each other at an internal corner, against a surface aligned at right angles to both of the plasterboard panels; * a junction between two corners of plasterboard panels aligned at right angles to each other at an external corner, against a surface aligned at right angles to both plasterboard panels; 35 * a junction between four coplanar plasterboard panel corners; * a junction between two coplanar plasterboard panel corners and an edge of a plasterboard panel; WO 2014/097197 PCT/IB2013/061121 5 * junction between a corner of a plasterboard panel and an internal cutaway corner in a coplanar plasterboard panel; * a junction between the corners of two coplanar plasterboard panels and a continuous edge of a coplanar skirting; 5 0 a junction between the corners of two plasterboard panels aligned at right angles to each other at an internal corner against a skirting coplanar with each of the plasterboard panels; * a junction between the corners of a first set of two coplanar plasterboard panels with the corners of a second set of two coplanar plasterboard panels aligned at 10 right angles to the first set of two coplanar plasterboard panels at an external corner; * a junction between the corners of a first set of two coplanar plasterboard panels with an edge of a plasterboard panel aligned at right angles to the first set of two coplanar plasterboard panels at an external corner; * a junction between a first plasterboard panel corner and a second 15 plasterboard panel corner aligned at right angles to each other, with the inside corner of a third plasterboard panel aligned at right angles to both the first plasterboard panel and the second plasterboard panel; * an extended junction going down to the floor between two plasterboard panels aligned at right angles with each other at a floor; 20 0 a junction between the corners of a first two coplanar plasterboard panels, and the corners of a second two coplanar plasterboard panels extending at right angles to the first two coplanar plasterboard panels; * a junction between the edges of two coplanar plasterboard panels and a plasterboard panel extending at right angles to said coplanar plasterboard panel; 25 0 a junction between the corners of three plasterboard panels each extending at right angles to each other, at an internal corner; * a junction between the corners of three plasterboard panels each extending at right angles to each other at an external corner; and * a junction between the internal corners of two plasterboard panels at 30 right angles to each other, and an internal corner in a plasterboard panel at right angles to the other two plasterboard panels. Preferably the retaining members comprises a plurality of members that are removably engageable with each other.. Preferably the retaining members comprises an outer retaining member and an 35 inner retaining member, each presenting an operational retaining surface for engaging with and respectively holding opposed major surfaces of a plasterboard panel.

WO 2014/097197 PCT/IB2013/061121 6 Preferably the outer retaining member and inner retaining member are elongate. Preferably the outer retaining member comprises one or more connector formation configured for connecting with one or more complimentary connector 5 formation on the inner retaining member. Preferably the outer retaining member comprises one or more outer retaining member barb formations configured for connecting with one or more complimentary inner retaining member barb formation on the inner retaining member. Preferably the outer retaining member comprises multiple barb formations to 10 allow for a variety locking of positions relative to the inner retaining member. Preferably the inner retaining member is operationally fastened to the construction by fasteners.. Preferably the inner retaining member comprises flanges which operationally engage against the inner surface of the plasterboard panel. 15 Preferably there are a plurality of inner retaining members which are operationally engaged against substantially all edges on the plasterboard panel to define a boundary thereto. Preferably there are one or more outer retaining members which are engaged against on substantially all edges on the plasterboard panel to, together with the inner 20 retaining members define a boundary to said plasterboard panel.. Preferably the outer retaining member and inner retaining member are elongate. Preferably the outer retaining member comprises an outer retaining member channel in the elongate direction. 25 Preferably an outer retaining member cover is provided for operationally covering and connectedly engaging with the outer retaining member channel. Preferably the outer retaining member comprises an outer retaining member barb formation that operationally engages within the inner retaining member's complimentary configured inner retaining member barb formation.. 30 Preferably the outer retaining member cover comprises an outer retaining member cover barb formation that operationally engages within an outer retaining member's complimentary configured outer retaining member barb formation.. Preferably the junction cap member comprises one or more junction cap channel. 35 Preferably the junction cap channel is continuous along the junction cap member.

WO 2014/097197 PCT/IB2013/061121 7 Preferably the junction cap channel is not continuous along the junction cap member.. Preferably the junction cap member comprises a junction cap cover for operationally covering and connectedly engaging with the junction cap channel. 5 Preferably the junction cap member, inner retaining member, outer retaining member, outer retaining member cover and junction cap cover are composed of plastic. Preferably the junction cap member and junction cap cover are composed of moulded plastic.. 10 Preferably the junction cap member and junction cap cover are composed of injection moulded plastic.. Preferably the outer retaining member, inner retaining member and outer retaining member cover are composed of extruded plastic.. In a further aspect the present invention may broadly be said to be a 15 plasterboard panel construction comprising a plasterboard panel retaining system as hereinbefore described. In a further aspect the present invention may broadly be said to be a plasterboard panel cladding kit for surfacing a construction comprising a pair of parallel elongate frame members spaced apart at a distance from each other, said kit 20 comprising * at least one or more planar plasterboard panels, each plasterboard panel comprising an inner major surface and an outer major surface extending between edges where said major surfaces intersect with minor surfaces of a plurality of minor surfaces; and 25 0 at least one or more plasterboard panel retaining members configured for extending between minor surfaces of adjacent plasterboard panels to secure at least an edge of at least one or more said plasterboard panels to a frame member; * wherein the shortest distance between minor surfaces of opposed edges of the plasterboard panel along a major surface is equal to the distance, centre to 30 centre, between the two frame members less the width of that portion of the retaining member that extends between adjacent minor surfaces of said adjacent plasterboard panels. Preferably the retaining member comprises a plurality of members capable of being removably engageable with each other. 35 Preferably the retaining member comprises an outer retaining member and an inner retaining member, each presenting an operational retaining surface for engaging WO 2014/097197 PCT/IB2013/061121 8 with and respectively holding opposed major surfaces of two adjacent plasterboard panels. Preferably the outer retaining member and inner retaining member are elongate.. 5 Preferably the outer retaining member comprises a connector formation that is configured for connecting with a complimentary connector formation on the inner retaining member.. Preferably the outer retaining member's and inner retaining member's connector formations are a barb type.. 10 Preferably the outer retaining member comprises multiple barbs to allow for a variety of locking Preferably the inner retaining member is fastened to the attachment members.. Preferably the inner retaining member comprises flanges which operationally engage against the inner surface of at least one plasterboard panel. 15 Preferably there are one or more inner retaining members which are operationally engaged against on substantially all edges on the plasterboard panel.. Preferably there are one or more outer retaining members which are operationally engaged against on substantially all edges on the plasterboard panel.. Preferably the outer retaining member comprises an outer retaining member 20 channel extending in the elongate direction of said outer retaining member. Preferably the plasterboard panel cladding system comprises at least one or more outer retaining member cover for operationally covering and connectedly engaging with the outer Preferably the outer retaining member cover comprises an outer retaining 25 member cover barb formation that engages within an outer retaining member's complimentary configured outer retaining member barb formation.. Preferably the plasterboard panel cladding system comprises at least one or more junction cap members configured and adapted for being operationally secured to one or more of the following; inner retaining member, outer retaining member. 30 Preferably the junction cap member comprises one or more junction cap channel.. Preferably the junction cap channel is continuous along the junction cap member.. Preferably the junction cap channel is not continuous along the junction cap 35 member.. Preferably the junction cap member comprises a junction cap cover that operationally engages securely with the junction cap channel..

WO 2014/097197 PCT/IB2013/061121 9 Preferably at least one or more of the junction cap member, outer retaining member, inner retaining member, outer retaining member cover and junction cap cover are composed of plastic.. Preferably at least one or more of the junction cap member and junction cap 5 cover are composed of moulded plastic.. Preferably at least one or more of the junction cap member and junction cap cover are composed of injection moulded plastic.. Preferably at least one or more of the outer retaining member, inner retaining member 10 Preferably the width between the two or more frame members is the regulatory width stated in a regional building code.. Preferably the panels are configured and adapted to be secured with a construction providing two or more parallel frame members spaced apart at n multiples of 300 millimetres where n is a number between 1 and 4. 15 Preferably the construction comprises an upper and lower frame member.. Preferably the height of the plasterboard panel is prefabricated to fit between the inner retaining members located on the upper frame member and lower frame member.. Preferably the plasterboard panels are rectangular and have a height between a 20 first pair of opposed edges and a width between a second pair of opposed edges, each of the second pair of opposed edges to locate parallel and along a respective frame member. Preferably the distance between said second pair of opposed edges is 1186mm. Preferably a paper coating is wrapped around said second pair of opposed 25 edges. Preferably the junction cap member is configured to operationally cover a predetermined junction type selected from one or more selected from: * a junction between two coplanar plasterboard panel corners against a surface or opening; 30 * a junction around a planar corner of an opening, * a junction between two corners of plasterboard panels aligned at right angles to each other at an internal corner, against a surface aligned at right angles to both of the plasterboard panels, * a junction between two corners of plasterboard panels aligned at right 35 angles to each other at an external corner, against a surface aligned at right angles to both plasterboard panels, * a junction between four coplanar plasterboard panel corners, WO 2014/097197 PCT/IB2013/061121 10 * a junction between two coplanar plasterboard panel corners and an edge of a plasterboard panel, * junction between a corner of a plasterboard panel and an internal cutaway corner in a coplanar plasterboard panel, 5 0 a junction between the corners of two coplanar plasterboard panels and a continuous edge of a coplanar skirting, * a junction between the corners of two plasterboard panels aligned at right angles to each other at an internal corner against a skirting coplanar with each of the plasterboard panels, 10 0 a junction between the corners of a first set of two coplanar plasterboard panels with the corners of a second set of two coplanar plasterboard panels aligned at right angles to the first set of two coplanar plasterboard panels at an external corner, * a junction between the corners of a first set of two coplanar plasterboard panels with an edge of a plasterboard panel aligned at right angles to the first set of 15 two coplanar plasterboard panels at an external corner, * a junction between a first plasterboard panel corner and a second plasterboard panel corner aligned at right angles to each other, with the inside corner of a third plasterboard panel aligned at right angles to both the first plasterboard panel and the second plasterboard panel, 20 0 an extended junction going down to the floor between two plasterboard panels aligned at right angles with each other at a floor, * a junction between the corners of a first two coplanar plasterboard panels, and the corners of a second two coplanar plasterboard panels extending at right angles to the first two coplanar plasterboard panels. 25 0 a junction between the edges of two coplanar plasterboard panels and a plasterboard panel extending at right angles to said coplanar plasterboard panel. * a junction between the corners of three plasterboard panels each extending at right angles to each other at an internal corner, * a junction between the corners of three plasterboard panels each 30 extending at right angles to each other at an external corner, and * a junction between the internal corners of two plasterboard panels at right angles to each other, and an internal corner in a plasterboard panel at right angles to the other two plasterboard panels. In a further aspect the present invention may broadly be said to be a 35 plasterboard panel construction comprising a plasterboard panel cladding kit as described.

WO 2014/097197 PCT/IB2013/061121 11 In a further aspect the present invention may broadly be said to be a plasterboard panel construction comprising * at least one or more plasterboard panels, each plasterboard panel defining a pair of major faces and a plurality of minor faces that intersect at edges; 5 0 at least one or more plasterboard panel retaining members configured for securing at least an edge of a plasterboard panel to a construction; and * at least one junction cap member configured and adapted for being secured to said plasterboard panel retaining members; * wherein said junction cap member is configured and adapted to cover at 10 least one junction; and * wherein the junction cap member is configured to engage securely with one or more of said one or more retaining members.. Preferably the junction of plasterboard panel edges is one or more selected from 15 * a junction between two coplanar plasterboard panel corners against a surface or opening; * a junction around a planar corner of an opening, * a junction between two corners of plasterboard panels aligned at right angles to each other at an internal corner, against a surface aligned at right angles to 20 both of the plasterboard panels, * a junction between two corners of plasterboard panels aligned at right angles to each other at an external corner, against a surface aligned at right angles to both plasterboard panels, * a junction between four coplanar plasterboard panel corners, 25 * a junction between two coplanar plasterboard panel corners and an edge of a plasterboard panel, * junction between a corner of a plasterboard panel and an internal cutaway corner in a coplanar plasterboard panel, * a junction between the corners of two coplanar plasterboard panels and 30 a continuous edge of a coplanar skirting, * a junction between the corners of two plasterboard panels aligned at right angles to each other at an internal corner against a skirting coplanar with each of the plasterboard panels, * a junction between the corners of a first set of two coplanar plasterboard 35 panels with the corners of a second set of two coplanar plasterboard panels aligned at right angles to the first set of two coplanar plasterboard panels at an external corner, WO 2014/097197 PCT/IB2013/061121 12 * a junction between the corners of a first set of two coplanar plasterboard panels with an edge of a plasterboard panel aligned at right angles to the first set of two coplanar plasterboard panels at an external corner, * a junction between a first plasterboard panel corner and a second 5 plasterboard panel corner aligned at right angles to each other, with the inside corner of a third plasterboard panel aligned at right angles to both the first plasterboard panel and the second plasterboard panel, * an extended junction going down to the floor between two plasterboard panels aligned at right angles with each other at a floor, 10 0 a junction between the corners of a first two coplanar plasterboard panels, and the corners of a second two coplanar plasterboard panels extending at right angles to the first two coplanar plasterboard panels. * a junction between the edges of two coplanar plasterboard panels and a plasterboard panel extending at right angles to said coplanar plasterboard panel. 15 0 a junction between the corners of three plasterboard panels each extending at right angles to each other at an internal corner, * a junction between the corners of three plasterboard panels each extending at right angles to each other at an external corner, and * a junction between the internal corners of two plasterboard panels at 20 right angles to each other, and an internal corner in a plasterboard panel at right angles to the other two plasterboard panels.. In a further aspect the present invention may broadly be said to be a plasterboard panel of a planar rectangular plan shape having a first pair of parallel opposed edges and a second pair of parallel opposed edges that are perpendicular to 25 said first pair of opposed edges, said panel comprised of a gypsum core and paper coating on each major surface of said panel, the paper coating also wrapping around said second pair of opposed edges, the distance between said second pair of opposed edges being between 1150mm and 1195mm. Preferably the distance between said second pair of opposed edges is between 30 1180 and 1190mm. Preferably the distance between said second pair of opposed edges is 1186mm. In a further aspect the present invention may broadly be said to be a plasterboard panel cladding kit for surfacing a wall construction comprising a plurality of parallel straight elongate studs spaced apart at a distance from each other, said kit 35 comprising: WO 2014/097197 PCT/IB2013/061121 13 * a plurality of planar plasterboard panels rectangular in plan shape and each comprising a first pair of parallel opposed edges and a second pair of parallel opposed edges that are perpendicular to said first pair of opposed edges, * plasterboard panel retainers each configured for extend between 5 adjacent second pair of opposed edges of two plasterboard panels that are to be secured at, and in a manner so that said edges extend parallel the elongate direction of, a stud. Preferably the wall construction comprising a plurality of parallel straight elongate studs have centres spaced apart at a distance of X mm from each other and 10 the shortest distance between said second pair of opposed edges of each plasterboard panel is X mm less the width of the portion of the retainer that extends between adjacent second pair of opposed edges of two plasterboard panels. Preferably the portion of the retainer that extends between adjacent second pair of opposed edges of two plasterboard panels serves the function of spacing the 15 two adjacent second pair of opposed edges of two adjacent plasterboard panels at a minimum distance apart.. Preferably said each panel comprised of a gypsum core and paper coating on each major surface of said panel, the paper coating also wrapping around said second pair of opposed edges. 20 Preferably the distance between said second pair of opposed edges is between 1150mm and 1195mm. Preferably the distance between said second pair of opposed edges is between 1180 and 1190mm. Preferably the distance between said second pair of opposed edges is 1186mm. 25 Preferably the distance between centres of said vertical studs is 600mm or 1200mm. Other aspects of the invention may become apparent from the following description which is given by way of example only and with reference to the accompanying drawings. 30 For the purposes of this specification, the term "plastic" shall be construed to mean a general term for a wide range of synthetic or semisynthetic polymerization products, and generally consisting of a hydrocarbon-based polymer. For the purposes of this specification, the term "plasterboard panel" shall be construed to mean a general term for a wide range of panels used for cladding internal 35 and/or external surfaces, and includes, but shall not be limited to: * cement fibre board panels, * gypsum board panels WO 2014/097197 PCT/IB2013/061121 14 * drywalling panels; * wallboard; * wood panels; * aluminium panels 5 0 and any other similar panels. For the purpose of this specification, where method steps are described in sequence, the sequence does not necessarily mean that the steps are to be chronologically ordered in that sequence, unless there is no other logical manner of interpreting the sequence. 10 As used herein the term "and/or" means "and" or "or", or both. As used herein "(s)" following a noun means the plural and/or singular forms of the noun. The term "comprising" as used in this specification means "consisting at least in part of". When interpreting statements in this specification which include that term, 15 the features, prefaced by that term in each statement, all need to be present but other features can also be present. Related terms such as "comprise" and "comprised" are to be interpreted in the same manner. The entire disclosures of all applications, patents and publications, cited above and below, if any, are hereby incorporated by reference. 20 This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of said parts, elements or features, and where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are 25 deemed to be incorporated herein as if individually set forth. BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described by way of example only and with reference to the drawings in which: 30 Figure 1a: shows an isometric assembly view of the outer retaining member cover, outer retaining member and inner retaining member; Figure 1b: shows a front view of Figure la's retaining members engaged; Figure 2a: shows another isometric assembly view of the outer retaining member cover, outer retaining member and inner retaining member; 35 Figure 2b: shows a front view of Figure 2a's retaining members engaged; Figure 3a: shows another isometric assembly view of the outer retaining member cover, outer retaining member and inner retaining member; WO 2014/097197 PCT/IB2013/061121 15 Figure 3b: shows a front view of Figure 3a's retaining members engaged; Figure 4a: shows another isometric assembly view of the outer retaining member cover, outer retaining member and inner retaining member; Figure 4b: shows a front view of Figure 4a's retaining members engaged; 5 Figure 5a: shows another isometric assembly view of the outer retaining member cover, outer retaining member and inner retaining member; Figure 5b: shows a front view of Figure 5a's retaining members engaged; Figures 6-23: shows isometric views of variously configured junction cap members; 10 Figure 24: shows a perspective view of possible configurations of the trim assembly; Figure 25: shows a perspective view of possible configurations of the trim assembly; Figure 26: shows an isometric view of the outer retaining member cover, outer 15 retaining member and inner retaining member; Figure 27: shows a front view of a plasterboard panel between two frame members; Figure 28: shows a side cross section view of a plasterboard panel between a skirting and ceiling; 20 Figure 29: shows an isometric above view of a junction cap member Figure 30: shows an isometric below view of a junction cap member; and Figure 31: shows an isometric view of a junction as used in the plasterboard panel retaining system. 25 DETAILED DESCRIPTION OF THE INVENTION With reference to the above drawings, a plasterboard panel retaining system according to a first aspect of the invention is generally indicated by the numeral 1000 (Figure 31). In one embodiment now described there is a plasterboard panel retaining 30 system 1000 for holding and securing a plasterboard panel 1500 (Figure 31) to a construction. The construction can be one or more of multiple building surfaces such as floors, ceilings, walls and construction framing. Where there are one or more plasterboard panel corners, it is defined as a junction 1700 (Figure 31). This is typically where two or more edges of the same or of adjacent plasterboard panels 35 meet and are not parallel each other. The plasterboard panel retaining system 1000 comprises an inner retaining member 1100 (Figure 26). The inner retaining member 1100 is fastened to a WO 2014/097197 PCT/IB2013/061121 16 construction frame, such as to the dwangs, studs or joists by fasteners such as screws 233, nails or adhesive. These may pass through flanges 1104 of the inner retaining member as can be seen in figure 28 and into a stud on the other side. As seen by way of explanation in figure 26, the inner retaining member 1100 is 5 elongate in shape. It is preferably of a constant cross section and may hence lend itself to being conveniently extruded. The inner retaining member 1100 has an inner retaining member channel 1101 in the elongate direction. The inner retaining member channel 1101 opens outwards from the wall. The inner retaining member channel 1101 comprises an inner retaining member connector formation 1103. 10 In a preferred embodiment the inner retaining member connector formation 1103 is a barb formation, with the inner retaining member barbs facing inwardly towards the elongate axis of the inner retaining member channel 1101. It is also envisaged that the inner retaining member connector formation 1103 can be a snap type fit, an adhesive formation, or any interlocking connecting formation. 15 The inner retaining member 1100 comprises an operational inner retaining surface 1102 which acts against the inner major surface 1501 of a plasterboard panel 1500. This inner retaining surface 1102 in the preferred embodiment is located on inner retaining member flanges 1104 which extend perpendicularly out from the elongate axis of the inner retaining member 1100. 20 The inner retaining member flanges 1104 stabilise the inner retaining member 1100 on the construction, as well as operationally engage the inner surface 1501 of the plasterboard panel 1500. The inner retaining member flanges 1104 are able to sit against the building structure or construction surface on multiple types of construction surface, including a planar construction where the inner retaining member flanges 25 1104 on either side of the inner retaining member channel 1101 are coplanar (Figures 1B - 3B), or between an internal or external corner (Figures 4B - 5B) where the inner retaining member flanges 1104 on either side of the inner retaining member channel 1101 are at substantially right angles to each other. Preferably the inner retaining member 1100 is composed of plastic. More 30 preferably the inner retaining member 1100 is composed of extruded plastic. In an alternative embodiment, the inner retaining member 1100 is composed of extruded aluminium. The plasterboard panel retaining system 1000 also comprises an elongate outer retaining member 1200 (Figure 26). The outer retaining member 1200 comprises an 35 outer retaining member connecting formation 1203 configured and adapted to connect with a complementary connecting formation on the inner retaining member's 1100.

WO 2014/097197 PCT/IB2013/061121 17 Preferably the outer retaining member connecting formation 1203 is a barb formation; this barb formation system comprises multiple barbs to allow for a variety of locking positions relative to the inner retaining member 1100. This variation of locking positions allows different thickness plasterboard panels to be used with the 5 plasterboard panel retaining system 1000. The outer retaining member 1200 also comprises an outer retaining member channel 1201 in the elongate direction of the outer retaining member 1200. The outer retaining member channel 1201 is able to be used as a conduit for wiring or piping for light fixtures, power supplies, local area network connections etc. 10 The outer retaining member channel 1201 negates the need to create holes or orifices in the plasterboard panel 1500, as well as the need for application and preparation of joint compound to cover imperfections in the plasterboard panel 1500 afterwards. The outer retaining member channel 1200 also allows flexibility to change 15 wiring if required. The outer retaining member 1200 comprises outer retaining member flanges 1206 that present a outer retaining surface 1204 which acts against the outer major surface 1501 (Figure 27) of a plasterboard panel. Outer retaining member flanges 1206 extend outwardly from the elongate axis of the outer retaining member 1200, and preferably parallel to the lower retaining 20 member flanges 1104. The outer retaining member flanges 1206 abut against and engage with the outer major surface 1501 of a plasterboard panel to push it against the inner retaining surface 1204 of the inner retaining member flanges 1104. The outer and inner retaining surfaces 1204 1102 are held together at a distance by the engaged inner retaining member connector formation 1103 and outer retaining 25 member connector formation to prevent the plasterboard panel 1500 from being released, and help prevent the plasterboard panel 1500 from being torn at its edges. In one embodiment the outer retaining member 1200 is composed of extruded plastic. In an alternative preferred embodiment, the outer retaining member 1200 is composed of extruded aluminium. 30 The plasterboard panel retaining system 1000 may also comprise an outer retaining member cover 1300 (Figure 26); this cover comprises an elongate shape in the elongate direction of the outer retaining member 1200. The outer retaining member cover 1300 has connecting formation 1301 configured and adapted to connect with the outer retaining member channel 1201. 35 Preferably the outer retaining member cover connecting formation 1301 is a barb formation. It is also envisaged that the outer retaining member cover connecting WO 2014/097197 PCT/IB2013/061121 18 formation 1301 can be a snap type fit, an adhesive formation, or any interlocking connecting formation. The outer retaining members cover 1300 is designed to cover and hide the channel any wiring in the outer retaining member channel 1201. 5 The outer retaining member cover 1300 may be pre-cut to the length between junction cap members 1400. In an alternative embodiment, the outer retaining member cover 1300 is cut to length. In another alternative embodiment the outer retaining member cover 1300 is flexible and can follow the continuous channel made by the outer retaining member 10 channel and the junction cap channel. Preferably the outer retaining member cover 1300 is composed of plastic. More preferably the outer retaining member cover 1300 is composed of extruded plastic. In an alternative embodiment, the outer retaining member cover 1300 is composed of stamped or cast aluminium. 15 The plasterboard panel retaining system 1000 comprises a junction cap member 1400 (Figure 29 & 30). The junction cap member 1400 comprises a body member configured to cover a junction. The junction cap member 1400 comprises at least one or more connector formations 1401 for operationally connecting the body member to at least one outer or inner retaining member 1200 1100. 20 It is envisaged that the junction cap member 1400 is configured to be able to connect to either or both of the outer retaining member 1200, and the inner retaining member 1100. This allows ease of assembly as, if the outer retaining member 1200 is slightly shorter than the inner retaining member 1100 or vice versa, the junction cap member 1400 can hide the overlap. 25 The junction cap member 1400 engages preferably with the inner retaining member 1100 and/or the outer retaining member 1200 by a series of junction cap protrusions 1401 which form an interference or tight fit between the junction cap member 1400 and the retaining members. It is also envisaged that the junction cap member could connect with a snap fit, 30 an adhesive joint, or any appropriate interlocking or engaging formation. The junction cap member 1400 comprises a junction cap channel 1403 for visual continuation of the upper retaining member channel and for any passage of conduit or wiring. In a preferred embodiment the junction cap channel 1403 is reflected by and continues through the junction cap member 1400; however in certain 35 junction types (as shown in Figures 9, 13 & 20) the junction cap channel 1403 may not extend across the entire junction cap 1400.

WO 2014/097197 PCT/IB2013/061121 19 The junction cap member 1400 is configured to operationally hide the junction 1700 of the outer retaining member 1200 and / or the inner retaining member 1100, and between adjacent outer retaining members. This flexibility allows for variation in the construction process by allowing the inner retaining member 1100 and the outer 5 retaining member 1200 to be of differing lengths, and means that the retaining members need not be cut exactly to size to fit against each other to form an aesthetically desirable junction. The junction cap member 1400 is composed of molded plastic or any other suitable material. Preferably, the junction cap member 1400 will be composed of 10 injection molded plastic. In one embodiment, the junction cap member 1400 comprises a tab for handling. This tab allows the junction cap member 1400 to be hung in a particular position and coated with a finish of a particular colour, material or texture. The junction cap member tab is configured to be attached by a frangible connector piece so that it can be broken off before installation. 15 The plasterboard panel retaining system 1000 may also comprises a junction cap cover for operationally covering and connectively engaging with the junction cap channel 1403. The junction cap member cover allows for hiding of said wiring in the junction cap channel 1403. The junction cap member cover is preferably an aesthetic continuation of the outer retaining member cover 1300. In an alternative embodiment 20 it is envisaged that the outer retaining member cover 1300 and the junction cap cover can be one and the same, composed of a flexible material to follow the path of the outer retaining member 1200 channel and the junction cap channel 1403. The junction cap cover also comprises junction cap cover connector formations that are configured for fitting securely with the junction cap channel 1403. The junction cap 25 cover is preferably composed of plastic, further more preferably injection molded plastic. In an alternative embodiment it is envisaged that the junction cap cover is made from alternative materials, such as aluminium. The plasterboard panel retaining system 1000 also comprises at least one prefabricated sized plasterboard panel 1500 (Figure 28). The preferred plasterboard 30 panel can be secured to a pair of frame members 1600 on a construction, the frame members 1600 spaced apart at a predetermined distance L 4 from each other (Figure 27). The distance between said frame members 1600 is typically an standard in the building industry. The plasterboard panel comprises an inner major surface 1502 and an outer major surface 1501 extending between edges where said major surfaces 35 intersect with minor surfaces. The distance between edges of the plasterboard panel along a major surface is equal to the distance between the two or more frame members 1600 less the width of the portion of the retaining member L 5 that extends WO 2014/097197 PCT/IB2013/061121 20 between the minor surfaces of said adjacent plasterboard panels. This allows the inner retaining members 1100 to be attached to the frame members 1600 around the eventual periphery of the plasterboard panel, without the need to construct more frame members, or cut the plasterboard panel 1500 to size. The width of a 5 plasterboard panel (Figure 27) is: Plasterboard panel Width L 6 = L4 - L5

L

6 is the plasterboard panel width. L 4 is the distance between the centres of two 10 parallel frame members 1600. These may be immediately adjacent frame members or not. L 5 is the distance between the inner retaining member 1100 defined gap of adjacent panels butting up to the retaining member. In one embodiment, the width between the two or more frame members 1600 is the regulatory width stated in a regional building code. In another embodiment, the 15 distance between centres of frame members 1600 is 300 millimetres. In another embodiment, the distance between centres of frame members 1600 is 600 millimetres. Preferably 600mm. The plasterboard is preferably rectangular in shape and is width of between 1150mm and 1195mm. Preferably its of a width that is between 1180 and 1190mm. 20 Preferably it's width is 1186mm. It preferably has paper cover sheet wrapped around the edges to that no plaster is exposed at the edges side edges. This may not be so at the top and bottom edges (eg the edges defining the ends of the length of the sheet). The height of the plasterboard panel 1500 is also prefabricated for the plasterboard panel retaining system 1000. The height of the plasterboard panel where 25 a skirting junction is used is (Figure 28): Plasterboard panel Height = L 3 - L1 - L 2 The height of the plasterboard panel (Figure 27) where a skirting junction is not 30 used is: Plasterboard panel Height = L 3 - L1

L

3 is the distance between the floor and ceiling. L 1 is the distance between the ceiling 35 and a plasterboard panel abutment point 203 (Figure 28). In one embodiment L 1 is 2.4 metres. In an alternative embodiment the plasterboard panel height is prefabricated to the wall height. In an alternative WO 2014/097197 PCT/IB2013/061121 21 embodiment, the plasterboard panel retaining system 1000 can be used without any specific plasterboard panel; such plasterboard panel can be formed or cut to suit the construction requirements. The junction cap member 1400 can be configured in a wide variety of 5 configurations (as shown in Figures 6 to 23) to conceal a wide variety of associated junction types. Some of the junction cap member configurations are listed below and shown in operation in Figures 24 and 25. One configuration of a junction cap member 117 is configured to cover the junction between two coplanar plasterboard panel corners against a surface or 10 opening. This is used where two adjacent plasterboard panel corners meet near a doorway, window or opening. One configuration of a junction cap member 118 is configured to cover the junction around a corner of an opening. This is used where an internal corner is cut out of a plasterboard panel for a doorway, window or opening. 15 One configuration of a junction cap member 119 is configured to cover the junction between two corners of plasterboard panels aligned at right angles to each other at an internal corner, against a surface aligned at right angles to both of the plasterboard panels. This could be used at a wall to ceiling corner, where both wall and ceiling are against a wall at right angles that is not part of the plasterboard panel 20 retaining system 1000. One configuration of a junction cap member 120 is configured to cover the junction between two corners of plasterboard panels aligned at right angles to each other at an external corner, against a surface aligned at right angles to both plasterboard panels. This could be used at an overhang where the overhang is against 25 a wall at right angles that is not part of the plasterboard panel retaining system 1000. One configuration of a junction cap member 110 is configured to cover the junction between four coplanar plasterboard panel corners. One configuration of a junction cap member 111 is configured to cover the junction between two coplanar plasterboard panel corners and an edge of a 30 plasterboard panel. One configuration of a junction cap member 112 is configured to cover the junction between a corner of a plasterboard panel and an internal cutaway corner in a coplanar plasterboard panel. One configuration of a junction cap member 113 is configured to cover the 35 junction between the corners of two coplanar plasterboard panels and a continuous edge of a coplanar skirting.

WO 2014/097197 PCT/IB2013/061121 22 One configuration of a junction cap member 116 is configured to cover the junction between the corners of two plasterboard panels aligned at right angles to each other at an internal corner against skirtings coplanar with each of the plasterboard panels. 5 One configuration of a junction cap member 121 is configured to cover the junction between the corners of a first set of two coplanar plasterboard panels with the corners of a second set of two coplanar plasterboard panels aligned at right angles to the first set of two coplanar plasterboard panels at an external corner. This could be used at an overhang where the overhang comprises of more than one length of 10 plasterboard panel. One configuration of a junction cap member 122 is configured to cover the junction between the corners of a first set of two coplanar plasterboard panels with an edge of a plasterboard panel aligned at right angles to the first set of two coplanar plasterboard panels at an external corner. This could be used at an external corner of 15 two walls, where one wall comprises one wall board and the other wall comprises two plasterboard panels. One configuration of a junction cap member 125 is configured to cover the junction between a first plasterboard panel corner and a second plasterboard panel corner aligned at right angles to each other, with the inside corner of a third 20 plasterboard panel aligned at right angles to both the first plasterboard panel and the second plasterboard panel. This could be used at an overhang, where the overhang abuts against the wall of a plasterboard panel retaining system 1000. One configuration of an extended junction cap member 123 is configured to cover the junction down to the floor between two plasterboard panels aligned at right 25 angles with each other at a floor. This could be used at an external corner of two walls, where the walls meet the ground. This junction cap member 123 hides the junction of two outer retaining members 1200 configured for skirting 103. This junction cap member 123 protects the corner from damage due to kicks or knocks. One configuration of a junction cap member 114 is configured to cover the 30 junction between the corners of a first two coplanar plasterboard panels, and the corners of a second two coplanar plasterboard panels extending at right angles to the first two coplanar plasterboard panels. One configuration of a junction cap member 115 is configured to cover the junction between the edges of two coplanar plasterboard panels and a plasterboard 35 panel extending at right angles to said coplanar plasterboard panel. One configuration of a junction cap member 124 is configured to cover the junction between the corners of three plasterboard panels each extending at right WO 2014/097197 PCT/IB2013/061121 23 angles to each other, at an internal corner. This could be used in an internal 3 way corner in a room, such as between two walls and a ceiling. One configuration of a junction cap member 126 is configured to cover the junction between the corners of three plasterboard panels each extending at right 5 angles to each other, at an external corner. This could be used in an external 3 way corner in a room, such as on an overhang. One configuration of a junction cap member 127 is configured to cover the junction between the internal corners of two plasterboard panels at right angles to each other, and an internal cutaway corner in a plasterboard panel at right angles to 10 the other two plasterboard panels. In use, the wallboard retaining system will be installed as described below. The inner retaining member 1100 is fastened to a building construction or frame, such as to the dwangs, studs or joists of a house, by fasteners such as screws, nails or adhesive. The inner retaining members 1100 are attached to the construction 15 where the eventual periphery of a plasterboard panel will be. Once the inner retaining members 1100 are attached, the wall board can be placed in abutment with them, with the inner retaining members surrounding the periphery of the plasterboard panel panels. It is envisaged that fasteners may be used to hold the plasterboard in place, although this is not necessary, as will be described 20 below Once the plasterboard panel panels are placed in abutment with the inner retaining members, the outer retaining members 1200 are pushed into the inner retaining members 1100 to hold the plasterboard panel panels in place. The outer retaining member barb formations 1203 and inner retaining member barb formation 25 1103 form a tight join between the outer and inner retaining members 1100 1200, to securely hold the plasterboard panel panel(s) in place between the outer and inner retaining surfaces 1204, 1102. Once the plasterboard panels are located securely, the junction cap member 1400 can be fitted at the junctions. The junction cap members 1400 are pushed into 30 place, securely fitting within either the inner retaining member 1100 or outer retaining member 1200 (Figure 31). Once the junction cap members 1400 are pushed into place, the outer retaining member channel 1201 and the junction cap channel 1403 align with each other. This continuous channel acts as a conduit for wiring or similar to be routed through. 35 To cover the outer retaining member channel 1201, an outer retaining member cover 1300 is used. The outer retaining member cover 1300 is located into the outer retaining member channel 1201 by way of a snap-fit type engagement. The outer WO 2014/097197 PCT/IB2013/061121 24 retaining member cover 1300, once located, preferably will sit flush with the outer surfaces 1205 of the outer retaining member 1200. To cover the junction cap channel 1403, the junction cap cover is pushed and located into the junction cap channel 1403. 5 In this way, the many varieties of inside and outside corners, and other junctions typical of a wall construction can be covered by junction cap members to provide an aesthetically desirable finish in a convenient manner. In one preferred embodiment, all of the connections described within the plasterboard panel retaining system 1000, except for the fastening of the inner 10 retaining member 1100 to the construction frame 1600, are easily disconnectable. This allows for flexibility in the building process, and also allows the removal or change of wiring in the channels. This flexibility in construction allows construction of walls or ceilings to be created without damaging the plasterboard panel. This dramatically improves construction time, and removes the need for joint compound. 15 Where in the foregoing description reference has been made to elements or integers having known equivalents, then such equivalents are included as if they were individually set forth. Although the invention has been described by way of example and with reference to particular embodiments, it is to be understood that modifications and/or 20 improvements may be made without departing from the scope or spirit of the invention. In addition, where features or aspects of the invention are described in terms of Markush groups, those skilled in the art will recognise that the invention is also thereby described in terms of any individual member or subgroup of members of the 25 Markush group.

Claims

1. A junction cap member suitable for at least partly covering a junction between plasterboard panel edges that are at least partly retained to a building structure by at least one retaining member, said junction cap member comprising; 5 a. a body member configured to cover at least part of said junction; and b. at least one or more connector formations for operationally connecting the body member to said at least one retaining member to facilitate retention of said junction cap member with said at least one retaining member. 10

2. A junction cap member as claimed in claim 1 wherein the junction cap member comprises one or more junction cap channel formations that, when in-situ, is located intermediate of edges of said plasterboard panel at said junction.

3. A junction cap member as claimed in claim 2 wherein the junction cap channel extents across the junction cap member. 15

4. A junction cap member as claimed in any one of claims 2 or 3 wherein the junction cap member comprises a removable junction cap cover for operationally covering and connectedly engaging at the junction cap channel.

5. A junction cap member as claimed in any one of claims 1 to 4 wherein the junction cap member is configured to operationally hide at the junction one or more of 20 the inner retaining member and adjacent edges of the plasterboard panels.

6. A junction cap member as claimed in any one of claims 1 to 5 wherein the junction cap member is configured and adapted to cover at one predetermined junction selected from one or of the following: * a junction between two coplanar plasterboard panel corners against a 25 surface or opening; * a junction around a planar corner of an opening; * a junction between two corners of plasterboard panels aligned at right angles to each other at an internal corner, against a surface aligned at right angles to both of the plasterboard panels; 30 0 a junction between two corners of plasterboard panels aligned at right angles to each other at an external corner, against a surface aligned at right angles to both plasterboard panels; * a junction between four coplanar plasterboard panel corners; * a junction between two coplanar plasterboard panel corners and an edge 35 of a plasterboard panel; * a junction between a corner of a plasterboard panel and an internal cutaway corner in a coplanar plasterboard panel; WO 2014/097197 PCT/IB2013/061121 26 * a junction between the corners of two coplanar plasterboard panels and a continuous edge of a coplanar skirting; * a junction between the corners of two plasterboard panels aligned at right angles to each other at an internal corner against a skirting coplanar with each of 5 the plasterboard panels; * a junction between the corners of a first set of two coplanar plasterboard panels with the corners of a second set of two coplanar plasterboard panels aligned at right angles to the first set of two coplanar plasterboard panels at an external corner; 10 0 a junction between the corners of a first set of two coplanar plasterboard panels with an edge of a plasterboard panel aligned at right angles to the first set of two coplanar plasterboard panels at an external corner; * a junction between a first plasterboard panel corner and a second plasterboard panel corner aligned at right angles to each other, with the inside corner 15 of a third plasterboard panel aligned at right angles to both the first plasterboard panel and the second plasterboard panel; * an extended junction going down to the floor between two plasterboard panels aligned at right angles with each other at a floor; * a junction between the corners of a first two coplanar plasterboard 20 panels, and the corners of a second two coplanar plasterboard panels extending at right angles to the first two coplanar plasterboard panels; * a junction between the edges of two coplanar plasterboard panels and a plasterboard panel extending at right angles to said coplanar plasterboard panel; * a junction between the corners of three plasterboard panels each 25 extending at right angles to each other at an internal corner; * a junction between the corners of three plasterboard panels each extending at right angles to each other at an external corner; and * a junction between the internal corners of two plasterboard panels at right angles to each other, and an internal corner in a plasterboard panel at right 30 angles to the other two plasterboard panels.

7. A plasterboard panel retaining system comprising * at least one or more plasterboard panel retaining members configured for securing at least an edge of a plasterboard panel to a construction; and * at least one junction cap member configured and adapted for being 35 secured to said plasterboard panel retaining members; * wherein said junction cap member is configured and adapted to cover at least part of one junction of plasterboard panel edges; and WO 2014/097197 PCT/IB2013/061121 27 * wherein the junction cap member is configured to engage securely with one or more of said one or more retaining members.

8. A plasterboard panel retaining system as claimed in claim 7 wherein, the junction is selected from one of the following: 5 0 a junction between two coplanar plasterboard panel corners against a surface or opening; * a junction around a planar corner of an opening; * a junction between two corners of plasterboard panels aligned at right angles to each other at an internal corner, against a surface aligned at right angles to 10 both of the plasterboard panels; * a junction between two corners of plasterboard panels aligned at right angles to each other at an external corner, against a surface aligned at right angles to both plasterboard panels; * a junction between four coplanar plasterboard panel corners; 15 * a junction between two coplanar plasterboard panel corners and an edge of a plasterboard panel; * junction between a corner of a plasterboard panel and an internal cutaway corner in a coplanar plasterboard panel; * a junction between the corners of two coplanar plasterboard panels and 20 a continuous edge of a coplanar skirting; * a junction between the corners of two plasterboard panels aligned at right angles to each other at an internal corner against a skirting coplanar with each of the plasterboard panels; * a junction between the corners of a first set of two coplanar 25 plasterboard panels with the corners of a second set of two coplanar plasterboard panels aligned at right angles to the first set of two coplanar plasterboard panels at an external corner; * a junction between the corners of a first set of two coplanar plasterboard panels with an edge of a plasterboard panel aligned at right angles to the 30 first set of two coplanar plasterboard panels at an external corner; * a junction between a first plasterboard panel corner and a second plasterboard panel corner aligned at right angles to each other, with the inside corner of a third plasterboard panel aligned at right angles to both the first plasterboard panel and the second plasterboard panel; 35 0 an extended junction going down to the floor between two plasterboard panels aligned at right angles with each other at a floor; WO 2014/097197 PCT/IB2013/061121 28 * a junction between the corners of a first two coplanar plasterboard panels, and the corners of a second two coplanar plasterboard panels extending at right angles to the first two coplanar plasterboard panels; * a junction between the edges of two coplanar plasterboard panels and a 5 plasterboard panel extending at right angles to said coplanar plasterboard panel; * a junction between the corners of three plasterboard panels each extending at right angles to each other, at an internal corner; * a junction between the corners of three plasterboard panels each extending at right angles to each other at an external corner; and 10 0 a junction between the internal corners of two plasterboard panels at right angles to each other, and an internal corner in a plasterboard panel at right angles to the other two plasterboard panels.

9. A plasterboard panel retaining system as claimed in any one of claims 7 or 8 wherein the retaining members comprises an outer retaining member and an inner 15 retaining member, each presenting an operational retaining surface for engaging with and respectively holding opposed major surfaces of a plasterboard panel.

10. A plasterboard panel retaining system as claimed in claim 9 wherein the outer retaining member and inner retaining member are elongate.

11. A plasterboard panel retaining system as claimed in claim 9 or 10 wherein the 20 outer retaining member comprises one or more connector formation configured for connecting with one or more complimentary connector formation on the inner retaining member.

12. A plasterboard panel retaining system as claimed in claim 9 or 10 wherein the outer retaining member comprises one or more outer retaining member barb 25 formations configured for connecting with one or more complimentary inner retaining member barb formation on the inner retaining member.

13. A plasterboard panel retaining system as claimed in claim 9 or 10 wherein the outer retaining member comprises multiple barb formations to allow for a variety locking of positions relative to the inner retaining member. 30

14. A plasterboard panel retaining system as claimed in any one of claims 9 to 13 wherein the inner retaining member comprises flanges which operationally engage against the inner surface of the plasterboard panel.

15. A plasterboard panel retaining system as claimed in any one of claims 9 to 14 wherein there are a plurality of inner retaining members which are operationally 35 engaged against substantially all edges on the plasterboard panel to define a boundary thereto. WO 2014/097197 PCT/IB2013/061121 29

16. A plasterboard panel retaining system as claimed in any one of claims 9 to 15 wherein the outer retaining member and inner retaining member are elongate.

17. A plasterboard panel retaining system as claimed in any one of claims 9 to 16 wherein the outer retaining member comprises an outer retaining member channel in 5 the elongate direction.

18. A plasterboard panel retaining system as claimed in claim 17 wherein an outer retaining member cover is provided for operationally covering and connectedly engaging with the outer retaining member channel.

19. A plasterboard panel retaining system as claimed in any one of claims 7 to 18 10 wherein the junction cap member comprises one or more junction cap channel.

20. A plasterboard panel retaining system as claimed in claim 19 wherein the junction cap channel is continuous along the junction cap member.

21. A plasterboard panel retaining system as claimed in claims 19 or 20 wherein the junction cap member comprises a junction cap cover for operationally covering and 15 connectedly engaging with the junction cap channel.

22. A plasterboard panel retaining system as claimed in any one of claims 9 to 18 wherein the junction cap member, inner retaining member, outer retaining member, outer retaining member cover and junction cap cover are composed of plastic.

23. A plasterboard panel construction comprising a plasterboard panel retaining 20 system as described with reference to anyone of more of claims 7 to 22.

24. A plasterboard panel cladding kit for surfacing a construction comprising a pair of parallel elongate frame members spaced apart at a distance from each other, said kit comprising * at least one or more planar plasterboard panels, each plasterboard 25 panel comprising an inner major surface and an outer major surface extending between edges where said major surfaces intersect with minor surfaces of a plurality of minor surfaces; and * at least one or more plasterboard panel retaining members configured for extending between minor surfaces of adjacent plasterboard panels to secure at 30 least an edge of at least one or more said plasterboard panels to a frame member; * wherein the shortest distance between minor surfaces of opposed edges of the plasterboard panel along a major surface is equal to the distance, centre to centre, between the two frame members less the width of that portion of the retaining member that extends between adjacent minor surfaces of said adjacent plasterboard 35 panels. WO 2014/097197 PCT/IB2013/061121 30

25. A plasterboard panel cladding kit as claimed in claim 24 wherein the retaining member comprises a plurality of members capable of being removably engageable with each other.

26. A plasterboard panel cladding kit as claimed in claim 25 wherein the retaining 5 member comprises an outer retaining member and an inner retaining member, each presenting an operational retaining surface for engaging with and respectively holding opposed major surfaces of two adjacent plasterboard panels.

27. A plasterboard panel cladding kit as claimed in claims 26 wherein the outer retaining member comprises multiple barbs to allow for a variety of locking 10

28. A plasterboard panel cladding kit as claimed in any one of claims 26 or 27 wherein the inner retaining member comprises flanges which operationally engage against the inner surface of at least one plasterboard panel.

29. A plasterboard panel cladding kit as claimed in any one of claims 26 to 28 wherein the outer retaining member comprises an outer retaining member channel 15 extending in the elongate direction of said outer retaining member.

30. A plasterboard panel cladding kit as claimed in claim 29 wherein the plasterboard panel cladding system comprises at least one or more outer retaining member cover for operationally covering and connectedly engaging with the outer

31. A plasterboard panel cladding kit as claimed in any one of claims 26 to 30 20 wherein the plasterboard panel cladding system comprises at least one or more junction cap members configured and adapted for being operationally secured to one or more of the following; inner retaining member, outer retaining member.

32. A plasterboard panel cladding kit as claimed in any one of claims 24 to 31 wherein the panels are configured and adapted to be secured with a construction 25 providing two or more parallel frame members spaced apart at n multiples of 300 millimetres where n is a number between 1 and 4.

33. A plasterboard panel cladding kit as claimed in any one of claims 24 to 32 wherein the plasterboard panels are rectangular and have a height between a first pair of opposed edges and a width between a second pair of opposed edges, each of the 30 second pair of opposed edges to locate parallel and along a respective frame member.

34. A plasterboard panel as claimed in claim 33 wherein the distance between said second pair of opposed edges is 1186mm.

35. A plasterboard panel as claimed in claim 33 or 34 wherein a paper coating is wrapped around said second pair of opposed edges. 35

36. A plasterboard panel construction comprising a plasterboard panel cladding kit as described.

37. A plasterboard panel construction comprising WO 2014/097197 PCT/IB2013/061121 31 * at least one or more plasterboard panels, each plasterboard panel defining a pair of major faces and a plurality of minor faces that intersect at edges; * at least one or more plasterboard panel retaining members configured for securing at least an edge of a plasterboard panel to a construction; and 5 0 at least one junction cap member configured and adapted for being secured to said plasterboard panel retaining members; * wherein said junction cap member is configured and adapted to cover at least one junction; and * wherein the junction cap member is configured to engage securely with 10 one or more of said one or more retaining members.. Preferably the junction of plasterboard panel edges is one or more selected from * a junction between two coplanar plasterboard panel corners against a surface or opening; * a junction around a planar corner of an opening, 15 * a junction between two corners of plasterboard panels aligned at right angles to each other at an internal corner, against a surface aligned at right angles to both of the plasterboard panels, * a junction between two corners of plasterboard panels aligned at right angles to each other at an external corner, against a surface aligned at right angles to 20 both plasterboard panels, * a junction between four coplanar plasterboard panel corners, * a junction between two coplanar plasterboard panel corners and an edge of a plasterboard panel, * junction between a corner of a plasterboard panel and an internal 25 cutaway corner in a coplanar plasterboard panel, * a junction between the corners of two coplanar plasterboard panels and a continuous edge of a coplanar skirting, * a junction between the corners of two plasterboard panels aligned at right angles to each other at an internal corner against a skirting coplanar with each of 30 the plasterboard panels, * a junction between the corners of a first set of two coplanar plasterboard panels with the corners of a second set of two coplanar plasterboard panels aligned at right angles to the first set of two coplanar plasterboard panels at an external corner, 35 0 a junction between the corners of a first set of two coplanar plasterboard panels with an edge of a plasterboard panel aligned at right angles to the first set of two coplanar plasterboard panels at an external corner, WO 2014/097197 PCT/IB2013/061121 32 * a junction between a first plasterboard panel corner and a second plasterboard panel corner aligned at right angles to each other, with the inside corner of a third plasterboard panel aligned at right angles to both the first plasterboard panel and the second plasterboard panel, 5 0 an extended junction going down to the floor between two plasterboard panels aligned at right angles with each other at a floor, * a junction between the corners of a first two coplanar plasterboard panels, and the corners of a second two coplanar plasterboard panels extending at right angles to the first two coplanar plasterboard panels. 10 0 a junction between the edges of two coplanar plasterboard panels and a plasterboard panel extending at right angles to said coplanar plasterboard panel. * a junction between the corners of three plasterboard panels each extending at right angles to each other at an internal corner, * a junction between the corners of three plasterboard panels each 15 extending at right angles to each other at an external corner, and * a junction between the internal corners of two plasterboard panels at right angles to each other, and an internal corner in a plasterboard panel at right angles to the other two plasterboard panels..

38. A plasterboard panel of a planar rectangular plan shape having a first pair of 20 parallel opposed edges and a second pair of parallel opposed edges that are perpendicular to said first pair of opposed edges, said panel comprised of a gypsum core and paper coating on each major surface of said panel, the paper coating also wrapping around said second pair of opposed edges, the distance between said second pair of opposed edges being between 1150mm and 1195mm. 25

39. A plasterboard panel as claimed in claim 38 wherein the distance between said second pair of opposed edges is between 1180 and 1190mm.

40. A plasterboard panel as claimed in claim 38 wherein the distance between said second pair of opposed edges is 1186mm.

41. A plasterboard panel cladding kit for surfacing a wall construction comprising a 30 plurality of parallel straight elongate studs spaced apart at a distance from each other, said kit comprising: * a plurality of planar plasterboard panels rectangular in plan shape and each comprising a first pair of parallel opposed edges and a second pair of parallel opposed edges that are perpendicular to said first pair of opposed edges, 35 0 plasterboard panel retainers each configured for extend between adjacent second pair of opposed edges of two plasterboard panels that are to be WO 2014/097197 PCT/IB2013/061121 33 secured at, and in a manner so that said edges extend parallel the elongate direction of, a stud.

42. A kit as claimed in claim 41 wherein the wall construction comprising a plurality of parallel straight elongate studs have centres spaced apart at a distance of X mm 5 from each other and the shortest distance between said second pair of opposed edges of each plasterboard panel is X mm less the width of the portion of the retainer that extends between adjacent second pair of opposed edges of two plasterboard panels.

43. A kit as claimed in claim 41 or 42 wherein said each panel comprised of a gypsum core and paper coating on each major surface of said panel, the paper coating 10 also wrapping around said second pair of opposed edges.

44. A kit as claimed in anyone of claims 41 to 43 wherein the distance between said second pair of opposed edges is between 1150mm and 1195mm.

45. A kit as claimed in claim 44 wherein the distance between said second pair of opposed edges is between 1180 and 1190mm. 15

46. A kit as claimed in claim 45 wherein the distance between said second pair of opposed edges is 1186mm.

47. A kit as claimed in claim anyone of claims 41 to 46 wherein the distance between centres of said vertical studs is 600mm or 1200mm.