DK181543B1

DK181543B1 - A method for mounting a roof window, a kit comprising a roof window and at least two flashing members, and a roof structure with a roof window mounted therein

Info

Publication number: DK181543B1
Application number: DKPA202270482A
Authority: DK
Inventors: Melsen Michael; Gaw Kevin
Original assignee: Vkr Holding As
Priority date: 2022-10-03
Filing date: 2022-10-03
Publication date: 2024-04-23
Also published as: WO2024074182A1; DK202270482A1

Abstract

A method for mounting a roof window in an inclined roof structure (3) is disclosed. It comprises the steps of A) arranging at least a frame (4) of the roof window so that a frame opening (40) coincides with an opening (30) in the roof structure, B) arranging at least two flashing members (21, 22; 24, 25) so that they extend along opposite sides of the opening (30), so that after completion of steps A) and B) the flashing members extend along respective frame members (41, 42; 44, 45), C) bringing a flashing locking section (23) each of said flashing members into a locking engagement with a frame locking section (43) on the respective frame member, and D) attaching each of said at least two flashing members to the roof structure. A kit, a flashing member, a roof window and a roof structure with a roof window are also disclosed.

Description

DK 181543 B1 1

Title of Invention

A method for mounting a roof window, a kit comprising a roof window and at least two flashing members, and a roof structure with a roof window mounted therein.

Technical Field

The present invention relates to a method for mounting a roof window in a roof structure inclined in a direction of inclination comprising the steps of:

A) arranging at least a frame of the roof window with a top frame member and a bottom frame member extending horizontally and two side frame members extending in the direction of inclination, and so that a frame opening delimited by said frame members coincides with an opening in the roof structure; and B) arranging at least two flashing members, so that they extend along opposite sides of the opening in the roof structure with a first leg of each flashing member extending in a height direction away from the roof structure towards an exterior, with a second leg of each flashing member extending in a width direction along an exterior side of the roof structure, and with a length direction of each flashing member extending in parallel with the respective side of the opening in the roof structure, said length direction being perpendicular to the height direction and to the width direction, so that after completion of steps A) and B) the flashing members extend along respective frame members with the first legs extending along outer sides of the frame members, said outer sides facing away from the frame opening. The invention further relates to a kit comprising a roof window and at least two flashing members, and to a roof structure with a roof window mounted therein.

In this context, “an exterior” is to be understood as the surroundings of the building covered by the roof structure and “an exterior side” as a side facing the exterior, i.e. facing away from the interior of the building.

Background Art

When mounting a roof window in a roof structure inclined in a direction of inclination, the frame of the roof window is traditionally arranged in an

DK 181543 B1 2 opening in the roof structure, the frame is then secured to the roof structure by means of mounting brackets, and flashing members are then used for covering the joint between the frame and the roof structure. While this principle works very well, it is desired to improve the environmental impact of the roof window installation.

Summary of Invention

It is therefore the object of the invention to provide a method for mounting a roof window in an inclined roof structure, which reduces the environmental impact of the roof window installation.

This and further objects are achieved with a method as defined in the introduction further comprising the steps of: C) bringing a flashing locking section on the first leg of each of said at least two flashing members into a locking engagement with a frame locking section on the outer side of the respective frame member, said locking engagement preventing relative movement of the flashing member and the respective frame member both in the height direction and in the width direction, and D) attaching the second leg of each of said at least two flashing members to the roof structure.

By establishing a locking engagement between the first legs of the flashing members and the frame members and attaching the second legs of the flashing members to the roof structure, the flashing members may transfer loads from the roof window to the roof structure, thereby wholly or partially taking over the loadbearing function of the mounting brackets traditionally used.

Ultimately, this means that it will be possible to instal the roof window without the use of mounting brackets, or at least that the mounting brackets can be made from alternative materials. Thereby it may be possible to reduce the material consumption and/or use materials having a lower carbon footprint than the materials used for traditional mounting brackets. Moreover, the flashing members may provide a continuous support along the length of the respective frame members whereas many traditional mounting brackets provide local support, for example by four separate mounting brackets being arranged one at each corner of the frame or two at each side frame member. This in turn may

DK 181543 B1 3 allow the use of alternative materials in the manufacture of the frame, including the use of materials with better thermal insulating properties, thereby also potentially contributing to a lower energy consumption for heating or cooling of the building in which the roof window is installed. Also, or alternatively, reinforcement previously used in the frame, such as metal inlays or corner inserts used for interconnecting extruded frame profiles, may no longer be necessary. Consequently, the carbon footprint of the roof window itself may also potentially be reduced.

To be able to transfer loads from the roof window to the roof structure, the flashing member may need to be made from a different material than the sheet aluminium traditionally used for flashing members. In one embodiment, the flashing member is made from stainless steel. Stainless steel provides both good weather resistance and a high loadbearing capacity and has a low thermal conductivity — less than one tenth of the thermal conductively of aluminium — which may be advantageous both in preventing heat-loss during cold weather and in protecting the roof window from overheating when the weather is warm. While stainless steel may have a higher carbon footprint than aluminium, the reduction in material consumption may more than compensate for that, resulting in a reduction of the carbon footprint of the installed roof window. Furthermore, the thermal advantage of using stainless steel described above may in itself result in a reduced carbon footprint when seen over the lifetime of the installed roof window.

Some roof windows are heavier than others depending for example on their size and on the type of pane used. It may therefore be advantageous to provide flashing members of different strengths for different installation situations. For this purpose, flashing members may made from different materials and/or having different material thickness and/or be provided with reinforcement, such as flanges or thickened sections.

In one embodiment, during step B), the flashing members are arranged with their length directions extending in the direction of inclination of the roof structure. In other words, the flashing members are side flashing members extending along the side frame members in the mounted state. This

DK 181543 B1 4 embodiment may be advantageous for mounting centre-hung roof windows, where a sash carrying a pane is connected to the side frame members via hinges and where the side frame members will therefore be subject to relatively high loads. Furthermore, the side frame members are usually longer than the top and bottom frame members and locking the side frame members to the flashings members attached to the roof structure may therefore provide a better support for the roof window. A still further advantage of the flashing members being side flashing members apply when the roof window is mounted in a roof comprising laths for supporting a roofing material. In that case the side flashing members may extend over several laths and may even out a possible height difference of the laths by spanning over laths located deep and pressing down laths located high.

It is presently preferred that the step A) is performed after step B), so that the flashing members are attached to the roof structure before mounting (the frame of the roof window. In this way the flashing members, which are comparatively easy to handle, can be securely attached to the roof structure before arranging the more bulky and typically also heavier frame. It is noted that when installing roof windows having both a frame and a sash carrying a pane, it is common practice to remove the sash from the frame, mount the frame, and then reattach the sash in order to avoid having to carry the weight of the sash and pane during attachment to the roof structure. For this reason, reference is made to arranging at least the frame of the roof window, but it is to be understood that this does not exclude mounting of the entire roof window.

In fact, this may be necessary if the roof window is not openable and does not include a sash.

In one embodiment where step A) is performed after step B), the frame of the roof window is moved in the height direction during step A). This may for example involve moving the frame in a direction substantially perpendicular to the plane of the roof structure, down between the flashing members, pressing the flashing members aside by bending their first legs. It may also be done by bringing the flashing locking section of one flashing member into a locking engagement with a frame locking section on one frame member, and then

DK 181543 B1 swinging the frame about the length axis of the one flashing member until the frame locking section of the opposite frame member comes into engagement with the flashing locking section of the other flashing member.

In another embodiment where step A) is performed after step B), the 5 frame of the roof window is moved in the length direction of the flashing members during step A). This may be done by displacing the frame in relation to the flashing members thereby sliding the frame locking sections into the flashing locking sections or vice versa.

It is also or alternatively possible to first bring the frame of the roof window into engagement with the flashing locking section of one of the flashing members and subsequently into engagement with the flashing locking section of the other flashing member. This may for example be done by swinging as described above. Alternatively, or in addition, the method may comprise bringing one flashing member into engagement with the frame of the roof window before steps A) and B), arranging the other flashing member to extend along a side of the opening in the roof structure before step A), and bringing the frame of the roof window into engagement with the other flashing member during step A). This may be done either by swinging or sliding the frame into place or by moving the frame in the width direction until it comes into engagement with the other flashing member.

A structurally simple way of establishing the locking engagement is to use a flashing locking section and a frame locking section which are embodied as a male part and a matching female part. In one embodiment, the locking engagement is established by such male and female parts snap-locking with each other during step C). In another embodiment such male and female parts are brought into engagement by displacing the frame along the length direction of the flashing members, so that the male part is inserted into the female part by relative displacement in the length direction. It is presently considered advantageous that the flashing locking section constitutes the male part and that the frame locking section constitutes the female part.

The male and female parts may have substantially the same overall shape, such as the shape of the Greek letter omega or a dovetail shape, as

DK 181543 B1 6 this may result in a good and stabile engagement with a good load transfer capability. It is, however, also possible to match a larger and/or more open female shape with a smaller and/or differently shaped male part, such as for example a female part having a rectangular internal shape with an opening in one of the longer sides of the rectangle and a male part having a dovetail shape. This may facilitate the insertion of the male part into the female part and may contribute to a snap-locking function.

Using a male and female part as locking sections may have the advantage that the locking engagement between the frame members and the first legs of the flashing members may be achieved without the use of screws, which are traditionally used for attachment of mounting brackets to the frame.

This means that the number of components necessary for the mounting of the roof window can be reduced, and since the frame members will not be penetrated there will be more design options with respect to the materials that can be used and their mutual position.

In one embodiment, one of at least two possible locking engagements between flashing locking section and frame locking section is chosen during step C). The two possible locking engagements may for example be achieved by one of the locking sections comprising two female part and the other of the locking sections comprising one male part. The male part can then be inserted in one or the other of the female parts. As an example, the two female parts may be located at different positions in the height direction so that the roof window can be arranged in different heights in relation to the roof structure, depending on which of the two female parts is chosen. A similar effect may be achieved using three female parts and two male parts or other configurations allowing more than one mutual positioning. Two or more male parts may provide a more stable locking engagement between the flashing locking section and the frame locking section as they will be better at hindering relative rotation about the length direction than a single male part. Using more than one male part may also provide additional resistance against unintentional relative movement of the flashing member and the frame in the length direction and/or against disengagement of the flashing locking section and the frame locking

DK 181543 B1 7 section.

The attachment of the second leg of each flashing member to the roof structure may for example be achieved by passing screws, nails or like fasteners through one or more openings in the second leg and into one or more parts of the roof structure, such as one or more laths. It may then be advantageous to provide more openings at different positions, so that the installer can chose the one(s), which is/are most advantageous with respect to achieving a good attachment to the roof structure. Such openings may for example be arranged in a line extending over the entire length of the second

Jeg. Alternatively, groups of openings may be provided at intervals along the length of the second leg. Each opening or group of openings may constitute an attachment section of the flashing member.

Alternatively, or additionally, the flashing member may comprise one or more flanges extending in the height direction and/or one or more flaps, which can be bent to extend in the height direction, said flanges and/or flaps being configured for engagement with the roof structure, so that they can serve as attachment sections. Such flanges and/or flaps may for example come into engagement with laths of the roof structure, thereby preventing movement in the length direction of the flashing member. If the flashing member is a side flashing member, this may prevent the side flashing member from sliding in the direction of inclination of the roof structure. Such a flange or flap may be provided with an opening for attachment to the roof structure using a screw, nail or like fastener.

For fixation of the frame in the length direction the method may further comprise the steps of:

E) arranging one or more additional flashing member(s) so that it/they extend(s) between the two flashing members arranged in step B), and

F) fixating the additional flashing member(s) in relation to the roof structure.

The fixation of the additional flashing member(s) in relation to the roof structure may be achieved by attaching the additional flashing members directly to roof structure and/or by attaching them to another item attached to

DK 181543 B1 8 the roof structure, such as to the flashing members arranged in step B).

In one embodiment, the flashing members arranged in step B) are side flashing members and the additional flashing members are a top flashing member and a bottom flashing member. In another embodiment, the flashing members arranged in step B) are a top flashing member and a bottom flashing member and the additional flashing members are side flashing members.

Fixation of the frame in the length direction may alternatively or additionally be achieved by the engagement between a flashing locking section and a frame locking section, for example be embodying these as local male and female parts such as a local circular projection engaging with a local circular depression. In one embodiment the flashing locking section and the frame locking section are configured for allowing the frame to slide in between the flashing members as described above and then come into a snap-locking engagement when reaching its intended position. This may for example by having a local male part on the frame member and by the flashing member being provided both with a first female part extending over the entire length and a second, slightly deeper and local female part at one end of the first female part. The male part may then travel along the first female part, while being slightly compressed or pressing the flashing member slightly aside, and then snap into the second female part at the end of the sliding movement.

It is also possible to fixate the frame in the length direction by connecting it to one or more flashing members using fasteners, such as screws, nails, or clamps, or using an adhesive.

The method may further comprise arranging an edge of an underroof of the roof structure, an underroof collar, and/or one or more insulating members between the frame of the roof window and the flashing members.

One or more insulating members may also be attached to the flashing members and mounted together with them.

A second aspect of the invention relates to a kit comprising a roof window for mounting in a roof structure inclined in a direction of inclination and at least two flashing members for extending along respective frame members of a frame of the roof window,

DK 181543 B1 9 said frame being configured for being mounted with a top frame member and a bottom frame member extending horizontally and two side frame members extending in the direction of inclination, said frame members defining a frame opening and each having an outer side facing away from the frame opening, and said flashing member(s) comprising a first leg and a second leg, said first leg extending in a height direction of the side flashing member and being configured for extending along the outer side of a respective frame member, said second leg extending in a width direction of the flashing member and being configured for extending along an exterior side of the roof structure, said height direction and said width direction being angled in relation to each other and perpendicular to a length direction of the flashing member, where the first leg of each of said at least two flashing members comprises a flashing locking section and the respective frame member comprises a frame locking section, said flashing locking section and said frame locking section being configured for coming into a locking engagement with each other, said locking engagement preventing relative movement of the flashing member and respective frame member in the height direction and in the width direction, and where the second leg of each of said at least two flashing members is configured for attachment of the flashing member to the roof structure.

In one embodiment the at least two flashing members are side flashing members configured for extending along the side frame members in the mounted state and these side flashing members are configured for transferring the entire load of the roof window to the roof structure in a mounted state.

A third aspect of the invention relates to a roof structure with a roof window mounted therein by the method according to the first aspect of the invention and/or using a kit according to the second aspect of the invention, where each of the at least two flashing members extend along a respective frame member of the frame of the roof window located on opposite sides of the frame opening with the first leg extending along the outer side of the respective frame member, where the flashing locking section on the first leg of each of

DK 181543 B1 10 said at least two flashing members is in a locking engagement with the frame locking section on the respective frame member, said locking engagement preventing relative movement of the flashing member and the respective frame member both in the height direction and in the width direction, and where the second leg of each of said at least two flashing members is attached to the roof structure.

Embodiments and advantages described with reference to one aspect of the invention also applies to the other aspects of the invention unless otherwise stated. As an example, the male and female locking sections described with reference to the first aspect of the invention may also be used in the kit, the flashing member, and the roof window of the second, and third aspects.

Brief Description of Drawings

In the following description embodiments of the invention will be described with reference to the schematic drawings, in which

Fig. 1 is a perspective sketch showing flashing members being attached to a roof structure,

Fig. 2 corresponds to Fig. 1, but showing the subsequent installation of a roof window frame,

Fig. 3 corresponds to Fig. 2, but showing different embodiments of the flashing members and the roof window frame,

Fig. 4 corresponds to Fig. 1-3, but showing the attachment of additional flashing members, and

Fig. 5 is a perspective view of a side flashing member with attachment sections.

Description of Embodiments

Referring initially to Fig. 1, an installer 1 is shown attaching a side flashing member 21 to a roof structure 3, which is inclined in a direction of inclination I. The side flashing member 21 extends along an opening 30 in the roof structure, and a corresponding, only mirror-inverted, side flashing member

DK 181543 B1 11 22 has been arranged along an opposite side of the opening in the roof structure. Each side flashing member 21, 22 has a first leg 211, 221 extending in a height direction H away from the roof structure 3 towards an exterior, and a second leg 212, 222 extending in a width direction W along an exterior side ofthe roof structure. A length direction L of each flashing member 21, 22, which is perpendicular to the height direction H and to the width direction W, extends in parallel with the respective side of the opening 30 in the roof structure, so that the length direction extends in the direction of inclination |.

In Fig. 1 the installer 1 uses an electric screwdriver 11 for fastening the second leg 212 of the side flashing member 21 to laths 32 of the roof structure 3, by passing screws (not shown) through the second leg, but other means of attachment may be employed. As indicated at the bottom right-hand side of the opening 30 in the roof structure, it may not be necessary to apply an auxiliary batten 33 to support the ends of the laths 32, as it has sometimes been done in traditional roof window installations, as the side flashing member 21 has sufficient strength and stiffness to bridge the gaps between the laths.

Turning now to Fig. 2, both side flashing members 21, 22 have been attached to the roof structure and the frame 4 of a roof window is installed. As may be seen, the frame has been arranged with two side frame members 41, 42 extending in the direction of inclination | and with a top frame member 44 and a bottom frame member 45 extending horizontally. A frame opening 40 delimited by said fame members coincides with the opening 30 in the roof structure. Each of the side flashing members 21, 22 thus extend along a respective side frame member 41, 42 with the first legs 211, 221 extending along outer sides of the frame members, said outer sides facing away from the frame opening 40.

As is best seen in the enlarged section of Fig. 2, a flashing locking section 23 on the side flashing member 22 has been brought into a locking engagement with a frame locking section 43 on the outer side of the frame 4.

In this embodiment the frame locking section 43 is a dovetail-shaped male part extending along the entire length of the side frame member 42 and the flashing locking section 23 is a similarly shaped female part. The frame locking section

DK 181543 B1 12 and flashing locking section provided on the other side frame member 41 and the other side flashing member 21 may be embodied in the same way, only mirror-inverted, but it is within scope of the invention to have different locking sections on opposite sides. Likewise, it is to be understood that the flashing locking section 23 may constitute the male part and the frame locking section 43 the female part.

The frame 4 may be brought into engagement with the side flashing members 21, 22 by displacing it in parallel to the plane defined by the roof structure, i.e. moving it in the length direction L of the flashing members, and the male part will then slide into the female part. Alternatively, the frame 4 may be moved in the height direction H, pressing the first legs 211, 221 of the side flashing members 21, 22 apart, until the male part eventually snaps into the female part. The latter option will require that at least the first legs of the side flashing members have a relatively high elasticity and/or that the frame locking section 43 and the flashing locking section 23 are configured for allowing a snap-locking engagement. To allow a snap-locking engagement it may be advantageous to make the female part slightly larger than the male part or to make the male part with a somewhat more rounded shape than shown in Fig. 2. A further possibility is to first bring the frame into engagement with the flashing locking section of one of the side flashing members and subsequently swinging or turning it into engagement with the flashing locking section of the other side flashing member. A still further possibility is to bring one of the flashing members 21, 22 into engagement with the frame 4 before arranging it on the roof 3 and arranging the other flashing member to extend along a side of the opening in the roof structure as described above. The frame locking section 43 on the one side will then be pre-engaged with the one flashing locking section 23 and the frame locking section on the other side will be brought into engagement with the other flashing locking section during installation of the frame. This may provide additional flexibility with respect to the possibility for relative movement of the frame and the flashing members.

An alternative embodiment of the locking sections 23, 43 is shown in

Fig. 3. Here the flashing locking section 23 constitutes the male part and the

DK 181543 B1 13 frame locking section 23 the female part. The male part comprises two projections each having the cross-sectional shape of the Greek letter omega, and the female part comprises three grooves of substantially the same shape.

During installation the two projections can be inserted either in the upper two of the grooves or in the lower two of the grooves, whereby the frame 4 will be located at two different height levels with respect to the roof structure 3. This may for example allow the installation height to be adapted to different roofing materials or different insulation requirements. In this embodiment too, the engagement may be achieved by sliding, or by inserting the frame 4 between the flashing member 21, 22 by movement in the hight direction H, until the projections snap into the grooves. In the latter case the projections will first snap into the upper two grooves and will then need to be pressed out of these for engagement with the lower grooves. To facilitate this, the upper grooves may for example be slightly larger or the upper part of the first leg of the flashing member slightly more flexible than the lower part.

As illustrated by the arrow and the open padlock to the left of the opening 30 in the roof structure in Fig. 2 and the open padlock in Fig. 3, the frame 4 may still be able to move in the length direction L after having brought into engagement with the side flashing members 21, 22, and therefore needs further fixation. This may be achieved by the installation of additional flashing members, as illustrated by a top flashing member 24 and a bottom flashing member 25 extending between the two side flashing members 21, 22 in Fig. 4.

In Fig. 4 the top flashing member has already been mounted and the bottom flashing member is being attached to the frame 4 by the installer 1 using an electric screwdriver 11. It is to be understood that at least one of the top and bottom flashing members 24, 25 needs to be fixated in relation to the roof structure 3 to lock the frame 4 in the length direction L. If one of them is attached both to the frame and to the roof structure, it may suffice to attach the other only to the frame, and due to the influence of gravity, urging the frame towards the bottom flashing member 25, it may in theory be sufficient to attach the bottom flashing member to the roof structure to lock the frame. Attaching both the top flashing member 24 and the bottom flashing member 25 to the frame 4

DK 181543 B1 14 may, however, be desirable as it will help to maintain a good contact between the flashing members and the frame, thus reducing the risk of water penetration.

In the embodiment shown in Fig. 4, the bottom flashing member 25 comprises a skirt member 251 configured for projecting over a roofing material in the mounted state, but it is to be understood that this is not of importance to the present invention.

Turning now to Fig. 5, a side flashing 21 is shown with five different embodiments of attachment section configured for use in attaching the side flashing member to the roof structure 3.

A first attachment section 51 in the form of a flange projecting downwards from the upper end of the side flashing member, i.e. into the roof structure 3 in the mounted state, is configured for coming into engagement with a lath and prevent the side flashing member from sliding in the direction of inclination of the roof structure. This attachment section is advantageous in that it does not interrupt the second leg 212 of the side flashing member but requires a precise positioning of the side flashing member in relation to the lath, which may require the installation of an auxiliary lath (not shown) if the regular laths are not in an appropriate position relative to the intended position of the roof window.

A second attachment section 52 in the form of a series of holes is configured for receiving screws or like fasteners passing through the side flashing member and into the roof structure 3. It is to be understood that the series of holes may comprise a different number of holes, possibly extending over the entire length of the side flashing member, and that the size, shape and position of the holes may be different from what is shown. This attachment section is advantageous in that it allows those holes, which are positioned appropriately in relation to for example laths, to be used, while the rest are left unused, but it interrupts the second leg 212 of the side flashing member which may be disadvantageous from a waterproofing point of view. To alleviate this problem, the holes may be provided with a rubber covering or the like, which is broken by the fastener(s) during insertion and providing a tight contact

DK 181543 B1 15 therewith.

A third attachment section 53 in the form of an elongate hole is configured for receiving screws or like fasteners passing through the side flashing member and into the roof structure 3. It is to be understood that several such holes may be provided over the length of the side flashing member, and that the size, shape, and position of the hole(s) may be different from what is shown. This attachment section is advantageous in that it allows a screw to be inserted at different positions depending on the position of for example laths and in that the side flashing member may move in relation to the fastener, for example to allow position of the side flashing member to be adjusted during installation and/or to compensate for thermal expansion or retraction. As for the second attachment section 52, the interruption of the second leg 212 of the side flashing member may however be disadvantageous from a waterproofing point of view and a rubber covering as described above may be employed.

A fourth attachment section 54 in the form of a flap, which can be bent out to project downwards from the second leg 212 of the side flashing member 21, i.e. into the roof structure 3, is configured for coming into engagement with a lath as described with reference to the first attachment section 51. Several such flaps may be provided and only that/those positioned appropriately in relation to for example laths can be used. As for the second attachment section 52, the interruption of the second leg 212 of the side flashing member may however be disadvantageous from a waterproofing point of view.

A fifth attachment section 55 is also in the form of a flap, which can be bent out to project downwards from the second leg 212 of the side flashing member 21, i.e. into the roof structure 3. This flap, however, is provided in a side flange 213 of the second leg 212 of the side flashing member and hence involves a less critical interruption of the second leg. The use and advantages of the fourth attachment section 54 also applies to this one.

In the description given above, reference is made primarily only to side flashing members, but it is to be understood that it is also possible to provide the flashing locking sections on the top flashing member 24 and the bottom flashing member 25, and that it is even possible to provide flashing locking

DK 181543 B1 16 sections on all four flashing members 21, 22, 24, 25. Providing the flashing locking sections on the top flashing member 24 and the bottom flashing member 25 may for example be relevant when the roofing material to be used for covering the roof structure 3 does not allow the use of side flashing members extending over the entire length of the side frame members. As an example, it is common practice to use several shorter side flashing members (not shown) arranged in a cascading overlapping manner when the roofing material is slate plates, each side flashing having approximately the same length in the length direction L as a slate plate. One or more of such shorter side flashing members may, however, also be provided with a flashing locking section.

The choice of roofing material may also influence on the attachment of the flashing members 21, 22, 24, 25 to the roof structure. Laths 32 are typically used for supporting tiles and/or for spanning gaps between rafters (not shown) of the roof structure 3. If the loadbearing structure of the roof structure is made from slabs of concrete and/or if the roofing material is a roofing felt, there may be no laths, and the flashing members will then be attached in the same way as has traditionally been used for attachment of mounting brackets to such roof structures.

DK 181543 B1 17

List of reference numerals 1 Installer 11 — Electric screwdriver 21 Side flashing member 211 First leg 212 Second leg 213 Side flange 22 Side flashing member 221 First leg 222 Second leg 23 Flashing locking section 24 Top flashing member

Bottom flashing member 251 Skirt 3 Roof structure

Roof opening 32 Lath 33 Auxiliary batten 4 Frame

Frame opening 41 Side frame member 42 Side frame member 43 Frame locking section 44 Top frame member

Bottom frame member

I Direction of inclination

H Height direction

L Length direction

W — Width direction

Claims

DK 181543 B1 18 Patent claim

1. Method for installing a skylight in a roof structure (3) sloping in a slope direction (1), comprising the steps: A) placing at least one frame (4) of the skylight with a top frame element (44) and a bottom frame element (45) ) extending horizontally and two side frame elements (41, 42) extending in the direction of inclination, and such that a frame opening (40), which is delimited by said frame elements, coincides with an opening (30) of the roof structure, and B) to place at least two covering elements (21, 22; 24, 25) such that they extend along opposite sides of the opening (30) in the roof structure with a first leg (211, 221) of each covering element extending in a height direction (H) away from the roof structure towards an exterior, with a second leg (221, 222) of each covering element extending in a width direction (W) along an outer side of the roof structure, and with a longitudinal direction (L) of each covering element extending parallel to the respective side of the opening in the roof structure, which longitudinal direction is perpendicular to the height direction and to the width direction, so that the covering elements (21, 22; 24, 25) after completion of steps A) and B) extend along respective frame members (41, 42; 44, 45) with the first legs (211, 221) extending along outer sides of the frame members which outer sides face away from the frame opening, characterized in that the method further comprises the steps: C) bringing a cover locking section (23) on the first leg (211, 221) of each of said at least two cover elements into a locking engagement with a frame locking section (43) on the outer side of the respective frame element, which locking engagement prevents relative movement of the covering element (21, 22; 24, 25) and the respective frame element (41, 42; 44, 45) both in the height direction (H) and in the width direction (W), and D ) to attach the second leg (221, 222) of said at least two covering elements to the roof structure (3).

DK 181543 B1 19

2. Method according to claim 1, where the covering elements during step B) are placed with their longitudinal directions extending in the direction of inclination of the roof structure.

3. Method according to claim 1 or 2, where step A) is carried out after step B), and where the frame of the skylight during step A) is moved in the height direction.

4. Method according to one or more of claims 1-3, where step A) is carried out after step B), and where the frame of the skylight during step A) is moved in the longitudinal direction of the covering elements.

5. Method according to one or more of claims 1-4, where the frame of the skylight is first brought into engagement with the covering locking section of one of the covering elements and subsequently into engagement with the covering locking section of the other covering element.

6. Method according to claim 5, further comprising bringing the covering elements into engagement with the frame of the skylight before steps A) and B), placing the second covering element so that it extends along one side of the opening in the roof structure before step A), and engage the frame of the skylight with the second flashing element during step A).

7. Method according to one or more of claims 1-6, where one of the covering locking section and the frame locking section is a trade, and the other of the covering locking section and the frame locking section is a female, and where the locking engagement is established during step C) by the covering locking section and the frame locking section snap locking with each other.

8. Method according to one or more of claims 1-6, where one of the cover locking section and the frame locking section is a handle, and the other of the cover locking section and the frame locking section is a female, and where the locking engagement is established during step C) by displacing the frame along a

DK 181543 B1 20 longitudinal direction of the covering element, which longitudinal direction is perpendicular to the height direction and to the width direction, so that the trade is inserted into the female part by relative displacement in the longitudinal direction.

9. Method according to any one of claims 1-8, where, during step C), one of at least two possible locking interventions is selected between the covering locking section and the frame locking section.

10. A method according to any one of claims 1-9, further comprising the steps: E) placing one or more additional covering element(s) such that it/they extend between the two covering elements placed in step B), and F ) to fix shared) additional covering element(s) in relation to the roof structure.

11. Set comprising a skylight for mounting in a roof structure (3) inclined in a direction of inclination (1) and at least two covering elements (21, 22; 24, 25) to extend along respective frame elements of a frame (4) of the skylight, which frame (4) is configured to be mounted with a top frame member (44) and a bottom frame member (45) extending horizontally and two side frame members (41, 42) extending in the slope direction, which frame members define a frame opening (40) and each has an outer side which faces away from the frame opening, and said covering element(s) comprises a first leg (211, 212) and a second leg (221, 222), which first leg extends in a height direction (H) of the covering element and is configured to extend along the outer side of a respective frame member, which second leg extends in a width direction (W) of the covering member and is configured to extend along an outer side of the roof structure, which height direction and which width direction are angled in relative to each other and are perpendicular to one

DK 181543 B1 21 longitudinal direction (L) of the covering element, characterized in that the first leg (211, 212) of each of said at least two covering elements (21, 22; 24, 25) comprises a covering locking section (23), and the respective frame element comprises a frame locking section (43), which cover locking section and said frame locking section are configured to come into a locking engagement with each other, which locking engagement prevents relative movement of the covering member (21, 22; 24, 25) and the respective frame member (41, 42; 44, 45) in the height direction and in the width direction, and that the second leg (221, 222) of each of said at least two covering elements is configured for attaching the covering element to the roof structure (3).

12. Kit according to claim 11, wherein the second leg comprises one or more fastening sections, such as flaps, flanges or openings.

13. Kit according to claim 11 or 12, wherein the at least two flashing members are side flashing members configured to extend along the side frame members in the installed condition, and wherein these side flashing members are configured to transfer the entire load of the skylight to the roof structure in an installed condition.

14. Roof structure (3) with a skylight mounted therein by the method according to one or more of claims 1-10 and/or using a kit according to any one of claims 11-13, wherein each of the at least two covering elements (21 , 22; 24, 25) extend along a respective sash member of the skylight window located on opposite sides of the sash opening with the first leg (211, 212) extending along the outer side of the respective sash member, where the cover locking section (23) on the first leg of each of the two covering elements is in a locking engagement with the frame locking section (43) of the respective frame element, which locking engagement prevents relative movement of the covering element (21, 22; 24, 25) and the

DK 181543 B1 22 respective frame element (41, 42; 44, 45) both in the height direction and in the width direction, and where the second leg (221, 222) of each of said at least two covering elements is attached to the roof structure (3).

15. Roof construction according to claim 14, where the at least two covering elements, which are in locking engagement with the frame, carry the entire load of the skylight.