JPS60119859A - Exterior wall finishing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exterior wall finishing method for a building, and more specifically, a net-like material is attached to a base material for a building formed by coating a cement mortar adhesive layer on a plate-shaped substrate. The present invention also relates to an exterior wall finishing method characterized in that an exterior wall finishing material is integrally applied from the upper surface of the net-like material.

A mortar base material for construction, in which a waterproof layer and a cement mortar adhesion layer are formed in advance on a plate-shaped substrate, was devised as a base material for mortar construction of wooden buildings, and is often used as a labor-saving component in the wet method 1 method. has been done.

This base material is lath base board, waterproof paper lining, lath wire mesh lining,
Or omit the undercoat and apply an intermediate coat.

It is a base material that only needs to be coated with a top coat, and it can sufficiently save labor in construction.

In addition, if a cement mortar adhesion layer containing foamed synthetic resin particles is formed on a plate-shaped substrate, the thickness of the cement mortar adhesion layer can be increased, which is superior in terms of weight reduction and workability. It is used as a nearly dry base material.

However, in this kind of base material, even after it has been placed between the structural members, due to drying shrinkage of the applied finishing mortar over time, warping occurs with the structural material as the fulcrum. As a result, a new problem has arisen in that cracks occur not only at butt joints between base materials but also along structural members.

Furthermore, as a result of the formation of a contact interface between the cement mortar adhesion layer and the base material, external impact forces tend to concentrate on this interface, resulting in the so-called peeling phenomenon at the interface.

On the other hand, since the finishing material is applied directly to the base material, it has the advantage of increasing the overall strength of the exterior wall material, even though the peeling phenomenon described in "2" does not occur. Since the outer wall surface is directly subjected to dimensional changes such as ′/M, the effect of preventing cracks on the outer wall surface cannot be expected to be very effective. Furthermore, compared to conventional construction methods, the closed structure eliminates the flow of water vapor between the outside and the inside of the wall, making it easier for dew to form inside the wall, which often causes the foundation and base material to rot. There were also points.

In order to solve these problems with base materials, warping and bending can be prevented by making the plate-like substrate itself thicker, by installing horizontally between structural members, and by reducing the spacing between structural members. However, some attempts are made to prevent cracks at the joints by attaching a strip of netting to the joints of the base material.
In addition, external wall finishing materials such as cement mortar, which were applied to the Murakami base, were selected to have minimal drying shrinkage. Measures to prevent condensation included strengthening the antiseptic treatment of foundations and base materials, and installing special air inflow and outflow ports to improve air circulation within the walls.

However, in all cases, the expected effects were not obtained despite the high construction effort and component costs.

Therefore, the present invention secures the advantages of a construction base material in which a waterproof layer and a cement mortar adhesion layer are formed on a plate-shaped substrate, while attaching a net-like material to the base material and applying the finishing material from the top surface. The present invention aims to provide a method for raising exterior wall materials that solves the above problems.

Hereinafter, the exterior wall finishing method of the present invention will be explained in detail based on the drawings.

Fig. 1 shows a mesh material 2 on the surface of a construction base material 1 that is stretched and sealed on a structural material erected on the foundation B of a building.
It is a perspective view of the state where is attached.

As shown in FIG. 2, the architectural base material 1 has a cement mortar adhesion layer 13 formed on the upper surface of a plate-shaped substrate 11 with a waterproof layer 12 interposed therebetween. The plate-shaped substrate 11 is usually a plywood board with a thickness of about 2 to 15 mm.

Wooden substrates such as particle board and fiberboard, as well as plastic plates, inorganic plates, and metal plates are used.

Waterproofing 912 is a resin used in ordinary paint film waterproofing methods, such as acrylic and ethylene vinyl acetate.

Synthetic resins such as water-based vinyl urethane, or styrene, etc.
Synthetic rubber such as butadiene rubber or butyl rubber, or asphalt is used, and is coated on the upper surface of the plate-shaped substrate 11 to a desired thickness using a coating unit such as a roll coater.

In some cases, this waterproof layer 12 alone forms a cement mortar adhesion layer 13 on the plate-shaped substrate 11.

The cement mortar adhesion layer 13 is often made of inorganic materials such as cement and fine sand, or a mixture of these inorganic materials and synthetic resin foam particles made of polystyrene, polyurethane, or the like. Since the cement mortar adhesion layer 13 contains the above-mentioned foamed synthetic resin particles, the weight of the entire base material is reduced, and it also becomes an architectural base material with excellent heat insulation performance and workability such as cutting and nailing. There is.

In addition, the cement mortar adhesion layer may be filled with inorganic aggregate to improve heat insulation, or it may be made of a foamed synthetic resin layer coated with synthetic resin granules so that it adheres to the cement mortar only on the surface. be.

FIG. 3 is a schematic cross-sectional view showing a state in which the net-like material 2 is attached to the base material 1 for construction.

The net-like material 2 is a highly flexible net-like material such as a lath wire mesh such as so-called metal lath, wire lath, or librus, a synthetic resin molded product such as polypropylene, polyethylene, or vinylon, or cheesecloth.

In this net-like material 2, a construction base material is stretched over the frame of a building, and after the joints are sealed, metal objects 3 such as staples and nails are generally covered on the top surface of the cement mortar adhesion layer 13. It was attached mechanically using the

In this example, the mesh 2 is stapled 3.3...
In order to attach to the surface of the cement mortar adhesion layer 13 by using the staples 3, 3..., it is preferable to strike the staples 3, 3... at longer intervals from the viewpoint of strength and moisture permeability;
m spacing is most preferred. The staples or nails to be used are not particularly limited, but have a wire diameter of 0.5 to 1.5.
A thin one (m+n) is preferable because it reduces water leakage and ensures moisture permeability, and the length should be at least long enough to reach the waterproof layer 12.

Second, as a finishing material for construction, any combination of mortar can be used, such as mortar made by mixing ordinary Portland cement and sand in a ratio of 1.3, or pre-mixed colored mortar.

FIG. 4 is a schematic cross-sectional view showing a state in which the net-like material 2 is attached in the same manner as described above to an adhesion layer 13a made of a foamed synthetic resin layer containing foamed synthetic resin particles to improve heat insulation.

In the construction base material 1 constructed as described above, the mesh material 2 attached to its upper surface, and the finish material, the finishing material is applied by stretching between the structural materials, so-called studs 4 and 4. The method will be explained with reference to FIGS. 1 and 5.

Studs 4°4...
will be erected.

A construction base material 1 is stretched between the studs 4, 4 as shown in FIG.

As this tensioning and fixing means, it is fixed to the stud abutment surface 41 of the building base material 1 via metal objects such as nails. Next, the side end surface of another architectural base material 1' (
In FIG. 5, the left end surface) is brought into contact with the stud 4 and fixed to the stud 4 in the same manner. The abutting portions of the architectural base materials 1 and 1' are abutted on the outer surface of the stud 4. Also, this butt joint part J is covered with sealant S for waterproofing.
Perform sealing process. Then, the net-like material 2 is fixed from above using staples or metal objects 3 such as nails. In this case, since the finishing mortar will adhere to the base material, the mesh 2 may be stretched to the extent that it roughly covers the base material, and the joint portions J do not necessarily need to be overlapped. Staple 3 is
Usually, using a manual or automatic tacker, 5 to 30 cm
Drive the net-like material 2 in between so as to fix it.

In this way, the architectural base materials 1 and 1' are connected to each other with studs 4.4...
After being stretched and fixed in between and facing, the net-like material 2 is stretched on the surface of the architectural base material 1, l' using staples 3, 3, etc. so as to roughly cover it. Then, construct its successor ``Nigezai 5''.

Various finishing methods such as troweling or stuccoing are used for the finishing material 5. In the construction of this finishing material 5, as described above, the net-like material 2 is attached in a bridging state between the surface convex portions of the cement mortar adhesion layer 13, so that the finishing material 5 is attached to the surface concave portions in the bridging state. 13o, 13p
..., and the so-called finishing material 5 is integrally applied to the cement mortar adhesion layer 13 via the net-like material 2 as an anchor material.

The finishing material 5 and the cement mortar adhesion layer 13 are also directly bonded to each other at the surface recesses 13o, 13p, . . . , so they have a so-called double bonded structure.

According to the exterior wall finishing method of the present invention, the net-like material is interposed between the cement mortar adhesion layer and the finishing material, thereby acting as a buffer material, and also acting as an anchor material for the finishing material. As a result, it can sufficiently follow and even resist external impact forces and changes over time in the structural material itself.

Therefore, not only is there very little peeling between the cement mortar adhesion layer and the finishing material, but also very little cracking on the surface of the finishing material.

In addition, there is no need to horizontally lay the base material for construction, and the degree of freedom in constructing the base material increases.
The spacing between structural members can also be determined only by general design values. Furthermore, the peeling off of finishing mortar material due to rust on lath wire mesh and staples, which conventionally occurs, can be eliminated by strengthening the adhesion between the cement mortar adhesion layer and the finishing material. When a large number of staples are driven across the entire surface of the plate-shaped substrate, penetrating the waterproof layer, fine holes are created in the thickness direction of the architectural base material, ensuring the waterproof performance of the architectural base material. These fine pores improve moisture permeability and have great secondary effects, such as less rot due to dew condensation, which is unique to this type of architectural base material.

As described above, according to the construction method of the present invention, the construction of a building base material is extremely stable and simplified, and the durability of buildings produced by this construction method is further improved.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing the state in which a net-like material has been attached to a structural material using the finishing method of the present invention. FIG. 3 is a schematic cross-sectional view of a state in which the mesh is attached to the cement mortar adhesion layer via metal fittings; FIG. 4 is a cross-sectional view showing the state in which the mesh is attached according to another embodiment. Schematic diagram: FIG. 5 is a sectional view illustrating the construction method according to the present invention. l... Architectural base material, 11... Plate-shaped substrate. 12...Waterproof adhesive layer. 13...Cement mortar adhesion layer. ! 3a, 13b---surface convex portion, 13o, +3p--four surface parts. 2... Net-like material, 21... Juyo. 3...Hardware such as staples, 4,4...Studs. 5... Finishing material, J... Joint part. S...Sealing material. Applicant Sanyo Kokusaku Pulp Co., Ltd. Agent Patent Attorney Kuninori Funahashi Figure 1 Figure 2 Figure 3] Figure 4 1 Figure 5

Claims (1)

[Claims] 1. A base material with a waterproof layer and a cement mortar adhesion layer formed on a plate-shaped substrate is assembled and pasted, and after the joint part is sealed waterproof, the net-like material is penetrated through the waterproof layer using metal objects such as staples or nails. An exterior wall finishing method characterized in that the net-like material is installed by driving it into place, and then a finishing material is applied from the top surface of the net-like material.