JP2005090165A - Outer wall structure in framework construction method for wooden building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outer wall structure which is excellent in fire resistance, waterproofness, ventilation, and workability, and fitted for inexpensive construction of a wooden building conforming to the Building Standard Law even in a densely built-up residential area. <P>SOLUTION: The outer wall structure is constructed according to a framework construction method for the wooden building, which consists of a heat resistant/heat insulating structural wall, a moisture-permeable waterproof layer, and a synthetic resin siding layer. The heat resistant/heat insulating structural wall is formed by setting up a wooden frame formed of wooden members connected together by means of nails, filling a heat insulating layer in the wooden frame, sticking a plaster board layer to the inside of the heat insulating layer, and sticking an inorganic reinforcing plate body layer formed of an inorganic foam, a fibrous material, and a binder, to the outside of the heat insulating layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an outer wall structure in a framework wall construction method of a wooden building, and more particularly to an outer wall structure in a framework wall construction method of a wooden construction that can be inexpensively constructed even in a densely populated residential area in a cold region.

  In recent years, metal siding materials such as painted aluminum plates and steel plates, ceramic siding materials such as tiles, ceramic plates, bricks and cement plates, vinyl chloride resin, A siding material for an outer wall such as a synthetic resin siding material such as a polyolefin resin is used (see, for example, Patent Document 1).

Among these siding materials for outer walls, synthetic resin-based siding materials such as vinyl chloride resin are relatively inexpensive, have excellent colorability, and have a breathability in the siding material itself. Even if the air-permeable layer is not formed and the indoor air is cooled by the outside air temperature, the moisture in the air does not condense inside the siding material and does not condense or freeze.
Therefore, the synthetic resin siding material does not need to form a ventilation layer on the indoor side of the siding material layer constructed like other metal siding materials or ceramic siding materials, but has poor fire resistance. For this reason, it is stipulated in the Building Standards Act that if the construction is to be carried out in a densely populated area, a fireproof layer such as gypsum board must be provided on the indoor side of the synthetic resin siding material such as vinyl chloride resin. (For example, refer nonpatent literature 1).
However, gypsum board with fire resistance is cracked by nailing, weak, brittle, and weak in water resistance, so synthetic resin siding material should be fixed directly on fireproof layer such as gypsum board with nails etc. I can't. For this reason, the synthetic resin siding material must be fixed using commercially available nails or screws with fixing brackets such as a barrel edge or a connecting spacer separately fixed to a pillar or the like.

On the other hand, the ceramic siding material has excellent fire resistance, but its weight is large, so if it is supported on the existing wall of a building such as a wooden house, the support burden is large and the support is large. A material having a large value as strength as a material is required, and in order to maintain waterproofness, it is necessary to use a sealing material in the vicinity of an opening such as a window or a joint portion with an accessory.
However, since such a sealing material is easily deteriorated, the thinning and cracking occur several years after the construction, so that rainwater enters from there and causes rain leakage and corrosion of wood.
In cold regions, the invading rain water freezes and expands due to a decrease in the outside air temperature, which may cause a serious problem of so-called frost damage that destroys the siding material.

Moreover, in the metal siding material, it is relatively light weight and is used in a wide range because it is a material excellent in fire resistance and waterproofness, but like the ceramic siding material, there is no moisture permeability, Due to poor heat insulation, in cold districts, air inside the room containing a lot of moisture is cooled by the outside air temperature, and moisture in the air is condensed on the room side of the siding material to form water droplets. When the water droplets are absorbed by the wood parts such as the plywood and pillars on the indoor side, the plywood and the wood parts are corroded or easily broken by freezing, which causes a serious structural problem.
Therefore, when constructing using these metal siding materials and ceramic siding materials, the indoor air containing a lot of moisture is cooled by the outside air temperature, and the moisture in the air condenses into water droplets. Under the Building Standards Act, a ventilation layer is formed between these siding material layers and the indoor heat insulating material layer so that the condensed water droplets are easy to dry so that corrosion is not likely to occur in plywood and wood parts. Construction is an essential condition (see, for example, Patent Document 2).

JP 2001-230778 A JP 2000-240256 A Building Standard Act Construction Order Article 80-2 No. 1

  Therefore, although the synthetic resin siding material itself is relatively inexpensive, it has poor fire resistance, so if you are going to construct it in a densely populated area, a fireproof layer such as gypsum board will be provided in the construction of the synthetic resin siding material. Therefore, even if it is constructed using a relatively inexpensive synthetic resin siding material, if it is constructed with a refractory layer such as gypsum board, the construction cost will be expensive, or synthetic resin will be applied to the gypsum board itself. The construction was not easy because the siding material could not be fixed directly.

  In addition, when using metal siding materials and ceramic siding materials, they are excellent in fire resistance and waterproofing, but they are not moisture permeable and have poor heat insulation properties. The indoor air that contains a lot of water is cooled by the outside air temperature, and moisture in the air is condensed to form water droplets on the indoor side of the siding material, which is absorbed by the wooden parts such as plywood and pillars on the indoor side Then, these wooden parts may be corroded or destroyed by freezing expansion, so a ventilation layer should be formed between the base material and the siding material so that the condensed water droplets can be easily dried. However, because it is an indispensable condition in the Building Standard Law, there was a drawback that the construction cost would be expensive.

  As a result of intensive studies in view of the above problems, the present inventor has used a relatively inexpensive synthetic resin siding material as an outer wall structure in a framed wall construction method of a wooden building, and a specific material using a specific material By adopting a laminated structure, it becomes excellent in fire resistance, breathability and waterproofness like metal siding materials and ceramic siding materials, so a ventilation layer is formed between the base material and siding material The present invention has been completed based on the knowledge that a wooden building conforming to the Building Standard Law can be constructed at low cost.

  That is, the outer wall structure in the frame construction method of the wooden building of the present invention is a structural wall assembled by striking plywood or gypsum board on a wooden frame produced by joining wood with nails, and a chamber of the structural wall. In the outer wall structure in the framework wall construction method of the wooden building composed of the siding layer stuck on the outside, the inside surrounded by the wooden framework manufactured by joining the wood with nails is filled with an insulating material layer, Heat resistance and heat insulation assembled by pasting a gypsum board layer on the indoor side of the wooden framework and pasting an inorganic reinforcing plate layer formed of an inorganic foam, fibrous material, and binder on the outdoor side It is composed of a structural wall, a moisture-permeable waterproof layer disposed on the outdoor side of the inorganic reinforced plate-like body layer of the heat-resistant and heat-insulating structural wall, and a synthetic resin siding layer disposed on the outdoor side. It is characterized in.

  The outer wall structure in the frame wall construction method of the wooden structure of the present invention is constructed with a synthetic resin siding material. However, as with a metal siding material or a ceramic siding material, it has fire resistance and air permeability. Since it is excellent in waterproofness and workability, it is possible to construct a wooden building that conforms to the Building Standards Law at a low cost even in densely populated areas without forming a ventilation layer.

[I] Exterior wall structure in the frame construction method of wooden construction
(1) Structure The outer wall structure 1 in the frame wall construction method of the wooden construction of the present invention is shown in FIG. 1, FIG. 2 and FIG. A wooden frame 4 manufactured by joining with nails 3 is filled with a heat insulating material layer 5 formed of a glass fiber heat insulating material, a rock wool heat insulating material, or the like, and a gypsum board layer 6 is formed on the indoor side of the wooden frame 4. And a heat-resistant / heat-insulating structural wall 9 manufactured by attaching an inorganic reinforcing plate-like body layer 8 formed of an inorganic foam, a fibrous material, and a binder to the outdoor side, and the heat-resistant / heat-insulating structural wall 9 is composed of a moisture-permeable waterproof layer 10 affixed to the outside of the inorganic reinforced plate-like body layer 8 and a synthetic resin siding layer 11 affixed to the outdoor side thereof.

(A) Heat-resistant / heat-insulating structural wall A heat-resistant / heat-insulating structural wall 9 constituting the outer wall structure 1 in the frame wall construction method of the wooden structure of the present invention is surrounded by a wooden frame 4 manufactured by joining wood 2 with nails 3. The inside is filled with a heat insulating material layer 5 formed of a glass fiber heat insulating material or a rock wool heat insulating material, and a gypsum board layer 6 is pasted on the indoor side of the wooden framework 4 and an inorganic foam is formed on the outdoor side. And an inorganic reinforced plate-like body layer 8 formed from a fibrous material and a binder.

(a) Wooden frame layer The inside surrounded by the wooden frame 4 manufactured by joining the wood 2 with the nail 3 is filled with a heat insulating material layer 5 and exhibits the heat insulating effect in the outer wall structure 1 of the present invention. It is something that can be done.
As the timber 2 forming the wooden frame layer 4 in the frame construction method of a wooden building, so-called 2 inches × 4 inches (actual dimensions are 1.5 inches × 3.5 inches) and 2 inches × 6 inches (actual dimensions are 1 .5 inch × 5.5 inch) standard wood with a nominal cross-sectional dimension is used. Four such woods 2 are used and their ends are joined together with nails to form a square, thereby producing a wooden framework 4.

(b) Gypsum board layer (indoor layer)
By sticking the gypsum board layer 6 on the indoor side of the wooden framework 4, the strength of the wooden framework 4 can be remarkably improved so that it can be exhibited as the structural wall 9 in the outer wall structure 1 of the present invention. .

(c) Inorganic reinforced plate-like body layer (outdoor layer)
Further, the strength of the wooden framework 4 is further improved by attaching an inorganic reinforcing plate-like layer 8 formed of an inorganic foam, a fibrous material, and a binder to the outdoor side of the wooden framework 4. Thus, the structure wall 9 can be exhibited and heat resistance, moisture permeability and heat insulation can be imparted.
In the outer wall structure 1 in the frame construction method of the wooden building of the present invention, it is important to provide the inorganic reinforcing plate-like body layer 8 formed of the inorganic foam, the fibrous material and the binder on the outdoor side of the wooden framework 4. In addition, by fixing the inorganic reinforced plate-like body layer 8 formed of such an inorganic foam, a fibrous material, and a binder by nailing or the like, fire resistance, heat insulation, and moisture permeability are imparted. It is something that can be done.
When gypsum board 6 or the like is pasted in place of the inorganic reinforcing plate-like body layer 8 formed from the inorganic foam, the fibrous material, and the binder, the fire resistance is excellent. In addition, the moisture permeability and freezing property are somewhat poor, and the strength of the heat-resistant and heat-insulating structural wall 9 is remarkably reduced (see Comparative Example 2).
In addition, when the plywood layer 7 is pasted instead of the inorganic reinforcing plate-like layer 8 formed from the inorganic foam, the fibrous material, and the binder, the strength of the heat-resistant and heat-insulating structural wall 9 is remarkably improved. However, the fire resistance is inferior (see Comparative Example 1).
Therefore, in order to remarkably improve the strength of the heat-resistant / heat-insulating structural wall 9 and to make the heat-resistant / heat-insulating structural wall 9 excellent in fire resistance, a plate-like body is formed by adding a binder to an inorganic foam and fibrous material. It is essential to use the inorganic reinforced plate-shaped body 8 formed into the above.
By using an inorganic reinforcing plate-like body layer 8 formed of an inorganic foam, a fibrous material, and a binder on the heat-resistant / heat-insulating structural wall 9, the wall strength can be made 4.5 or more, Since an inorganic foam is used, the specific gravity can be as light as wood with a specific gravity of 0.6 to 0.9. Furthermore, the inorganic reinforced plate-like body layer 8 formed from the inorganic foam, the fibrous material and the binder has a moisture permeability resistance of 2.3 to 3.0 m ² · h · mmHg / g, and is a structural plywood. It is 1/3 or less of 10.0 m ² · h · mmHg / g, and moisture on the indoor side can be discharged to the outside.
As the inorganic reinforced plate-like body layer 8 formed from the inorganic foam used for the outdoor side of the wooden framework 4, the fibrous material, and the binder, the inorganic foam and the fibrous material are mixed with the binder. An inorganic reinforced plate-like body 8 formed into a shaped body is used.
The inorganic reinforced plate-like body 8 formed by mixing a binder with such an inorganic foam and fibrous material and formed into a plate-like body can be made into a material that can be screwed or nailing.

Inorganic Reinforced Plate Material Layer Inorganic Reinforced Plate 8 formed from the inorganic foam, fibrous material, and binder, specifically, for example, calcium carbonate, calcium sulfate, calcium silicate, silica sand, Inorganic plate-like body 8b in which micro-silica, slag, aluminum hydroxide or the like is formed into a plate-like body, and inorganic such as pearlite, shirasu foam, silica flower, glass foam on at least one surface of the inorganic plate-like body 8b A plate made of foam, rock wool, slag wool, mineral wool, glass fiber, pulp, polypropylene fiber, etc., and a synthetic resin such as polyvinyl alcohol resin, phenol resin, acrylic resin, or a binder such as starch. A screw-fixable inorganic reinforcing layer 8a is provided.

Structure of inorganic reinforced plate-like body layer As the above-mentioned inorganic reinforced plate-like body 8 that can be screwed, the inorganic reinforced layer 8a formed from an inorganic foam, a fibrous material, and a binder, or the above-mentioned inorganic plate It has a three-layer structure in which an inorganic foam and an inorganic reinforcing layer 8a in which a binder is mixed with a fibrous material are laminated on both the front and back surfaces of the solid body 8b, or an inorganic foam on one side of the inorganic plate-like body layer 8b. An inorganic reinforced plate-like body layer 8 having a two-layer structure in which an inorganic reinforced layer 8a formed from a body, a fibrous material, and a binder is formed.
Among these inorganic reinforced plate-like body layers 8, those having a laminated structure having a three-layer structure or a two-layer structure are preferable, and it is particularly preferable to use the inorganic reinforced plate-like body layer 8 having the three-layer structure.

Thickness of the inorganic reinforcing plate layer The thickness of the inorganic plate layer 8 is generally 7 to 15 mm, preferably 9 to 12 mm.

Effect of inorganic reinforced plate-like body layer By providing such an inorganic reinforced plate-like body 8, fire resistance, nailing strength, durability, water resistance, and workability can be remarkably improved.
The inorganic reinforced plate-like body 8 formed from the inorganic foam, the fibrous material, and the binder is already marketed as “Dielite MS” by Daiken Industry Co., Ltd.

(B) Moisture permeable waterproof layer
(a) Material of moisture-permeable waterproof layer The moisture-permeable waterproof layer 10 constituting the outer wall structure 1 in the frame wall construction method of the wooden building of the present invention is a layer that is waterproof but waterproof. Specific examples include an asphalt-impregnated waterproof sheet and a moisture-permeable waterproof sheet (moisture-permeable film).
Specifically, such a moisture-permeable waterproof sheet (moisture-permeable film) is commercially available, for example, as a nylon sheet manufactured by DuPont, USA under the trade name “DuPont Tyvek 1060B (JIS A 6111)”.

(b) Effect of moisture-permeable waterproof layer The moisture-permeable waterproof layer 10 used here is constructed to completely block rainwater that has permeated through the gaps of the synthetic resin siding layer 11 described later in the event of a typhoon or the like with severe wind and rain. Is done. However, it is important to provide moisture permeability in order to exhaust moisture in the indoor air to the outdoor side of the moisture permeable waterproof layer 10. And the moisture exhausted to the outdoor side of the moisture-permeable waterproof layer 10 is condensed by contact with the outside air, but the water drops are protected by the moisture-permeable waterproof layer 10 and do not enter the indoor side, On the day when it becomes clear and warm, it is discharged out of the outer wall structure 1 due to the gap and air permeability of the synthetic resin siding layer 11 described later.

(c) Thickness of moisture-permeable waterproof layer The thickness of the moisture-permeable waterproof layer 10 used here is generally 0.1 to 0.5 mm, preferably 1.5 to 0.3 mm.

(C) Synthetic resin siding layer
(a) Material of Synthetic Resin Siding Layer As the synthetic resin siding layer 11 constituting the outer wall structure 1 in the frame wall construction method of the wooden building of the present invention, a siding material made of thermoplastic resin is usually used. Examples of the thermoplastic resin include vinyl chloride resins, polyolefins such as polyethylene and polypropylene, polymethyl methacrylate, styrene copolymers, acrylate-styrene-acrylonitrile copolymers (AAS resins), chlorinated polyethylene, acrylonitrile-styrene copolymers. A polymer (ACS resin), fiber reinforced plastic (FRP), etc. can be mentioned. Among these thermoplastic resin siding materials, it is important to use a synthetic resin siding material exhibiting moisture permeability. Specific examples include a siding material made of vinyl chloride resin and a siding material made of polyolefin resin.
Among these synthetic resin-based siding materials, the siding material made of vinyl chloride resin exhibits excellent moisture permeability and does not cause freezing destruction, and has excellent resistance to salt damage, acidity and alkalinity. It is an optimal synthetic resin to achieve the above.
Vinyl chloride siding material is a decorative material that maintains the excellence of buildings such as houses over a long period of time, and protects heat insulation materials and other building components located indoors from siding materials, and is also flame retardant. Can be maintained. Further, it is a synthetic resin having a high degree of freedom in coloring the resin and a shape design at the time of molding, a decrease in physical properties over a long period of time, and flame retardancy.
As such a siding material made of vinyl chloride resin, specifically, for example, as a single layer siding material made of vinyl chloride resin made by United States Tartin Seed Corporation (trade name), trade names “Hamilton Park”, “Monogram”, It is marketed as “Carolina Beded”, “Main Street”, etc.
Additives such as pigments, processing aids, heat stabilizers, ultraviolet absorbers, and the like are added to the synthetic resin plates constituting these siding materials as necessary.

(b) Structure of Synthetic Resin Siding Layer The structure of the synthetic resin siding material 11 is not particularly limited, but is usually composed of a single synthetic resin plate, laminated with a plurality of synthetic resin plates, A composite or the like in which an appropriate foam is bonded to the back side of a layer or a plurality of synthetic resin plates can be given. When laminating a plurality of synthetic resin plates, the same resin material is preferable from the viewpoint of separation and recycling. For example, a co-extruded two-layer structure using vinyl chloride resin, the base layer part is composed of a low-cost resin compound material mainly composed of recycled materials, and the surface layer part is a virgin resin compound material with excellent weather resistance It is economical to configure using
In particular, by providing a material layer with good weather resistance on the surface layer and laminating a low-cost material on the lower layer, it is possible to ensure economy while improving durability. In the case of a composite that combines a single layer or multiple synthetic resin plates with appropriate foam, make up for the lack of rigidity of the thin synthetic resin siding, reinforce the heat insulation performance, and improve handling and workability. Can do. Examples of the foam include foamed polyurethane, foamed polystyrene, and isocyanurate foam. In this case, the foam has a thickness of about 1 to 10 mm.
In particular, by providing a material layer with good weather resistance on the surface layer and laminating a low-cost material on the lower layer, it is possible to ensure economy while improving durability. In the case of a composite that combines a single layer or multiple synthetic resin plates with appropriate foam, make up for the lack of rigidity of the thin synthetic resin siding, reinforce the heat insulation performance, and improve handling and workability. Can do. Examples of the foam include foamed polyurethane, foamed polystyrene, and isocyanurate foam. In this case, the foam has a thickness of about 1 to 10 mm.

(c) Size of siding material The size of the siding material is not particularly limited. Usually, in the case of an extrusion-molded product, the vertical dimension is 100 to 400 mm, the horizontal dimension is 1000 to 5000 mm, and in the case of an injection-molded product. The vertical dimension is preferably about 500 to 1000 mm and the horizontal dimension is about 500 to 2000 mm. In particular, the normal construction of siding materials is performed from the bottom to the top of the building (or vice versa), or laterally, so that each dimension is in the range of 100 to 5000 mm. Things are convenient in construction. The thickness of the siding material is not particularly limited, but is preferably about 0.5 to 10 mm.
An uneven pattern portion can be formed on the surface of the synthetic resin siding material used in the present invention.

(d) Properties of siding material
Surface Density The surface density of the siding material is usually 0.5 to 15 kg / m ² or less, preferably 0.5 to 10 kg / m ² . When the surface density is excessively small, the strength as the exterior material is weak, and when the surface density is excessively large, the siding material becomes too heavy, and a reinforcing structure for holding the siding material may be required. Rigidity increases, and workability particularly in narrow places is reduced.

(e) Attachment It is preferable that the synthetic resin siding material 11 is directly attached to the outdoor side of a building such as an existing wall of a general house without providing, for example, a trunk edge or a connecting spacer. As a result, the synthetic resin siding material 11 can be directly attached to the mounting surface of the building via the moisture-permeable waterproof layer 10, so that it can be firmly attached or can be easily constructed, so that the construction is inexpensive. can do.

(2) Effect It is preferable to attach directly to the outdoor side of buildings such as existing walls of ordinary houses without providing a trunk edge or connecting spacer. As a result, the synthetic resin siding material 11 can be directly attached to the mounting surface of the building via the moisture-permeable waterproof layer 10, so that it can be firmly attached or can be easily constructed, so that the construction is inexpensive. can do.

The present invention will be described more specifically with reference to the following examples and comparative examples, but the present invention is not limited to these examples.
[I] Evaluation method
(1) Fire resistance As a fire resistance measurement method, the Building Standard Act Article 23 and the Building Standard Act Construction Ordinance Article 109-6 No.1 and No.2 which are certification tests for fire prevention structures approved by the Ministry of Land, Infrastructure, Transport and Tourism (Outer wall (bearing wall): 20 minutes each)

(2) Waterproofness As a measuring method of the waterproofness test, it was carried out under the following conditions.
Test device: Water-tight test device having an opening with a width of 2,000 mm and a height of 2,000 mm that meets the specifications of JIS A1517 (joint water-tightness test method)
・ Size: 2,000mm width x 2,000mm height

(3) Moisture permeability The measurement method of the moisture permeability test was performed under the following conditions.
Test method・ Install a test wall (H2,400mm × W500mm × D89mm) in a laboratory building ・ Install a container with water in the test wall and measure the amount of water loss in the container.

(4) Freezing property The measuring method of the freezing property test was performed under the following conditions.
Equipment used: Constant temperature and humidity chamber Test piece: Several cutouts were made in the siding width Test conditions: [Immersion in water (25 ° C., 24 hours) / Freezing (−30 ° C., 24 hours)] × 10 times It was conducted.

(5) Workability As a method of measuring workability, the ease of construction when heat-resistant and heat-insulated structural walls were constructed was evaluated.

(6) Strength The strength was measured by evaluating the performance of the frame wall method bearing wall measurement method for accreditation based on Article 8-3 of the Building Standard Law Regulations.

[II] Examples and Comparative Examples
Example 1
(1) Construction of the outer wall structure (A) Construction of the wall frame of the wooden construction framework wall construction method In the construction of the wooden construction framework wall construction method, the wood frame vertical frame (38mm x 89mm) is bonded to the nail by 500mm. A wall frame surrounded by a wooden frame was produced by attaching it at intervals.

(B) Attaching the inorganic material reinforced plate-like material On the wall frame of the above-mentioned wooden frame, an inorganic material reinforced plate-like material made of volcanic glassy multilayered board (Dailite Industrial Co., Ltd. exterior construction material “Dielite MS” “9 mm, product number GMS0413-11) was attached using a 3.1 mmφ × 50 mm stainless screw nail.

(C) Attaching a moisture permeable waterproof layer And, on top of it, a moisture permeable and waterproof sheet (sheet made by DuPont's polyethylene continuous ultrafine fibers bonded with high heat, trade name “Tyvek”, thickness 0 .18 mm) were attached with staples at intervals of 100 mm. The overlapping portion of the moisture permeable / waterproof sheet was 100 mm and sealed with waterproof tape.

(D) Construction of heat insulating material Glass wool was filled between the vertical frame (38 mm × 89 mm) and a vertical frame adjacent thereto, and a gypsum board having a thickness of 12.5 mm or more was attached by nailing.
Next, a draining plate was attached in the horizontal direction on the moisture permeable / waterproof sheet on the outdoor side.

(E) Attaching the vinyl chloride resin siding layer Single-layer vinyl chloride resin siding material (trade name “monogram”, thickness 1.1 mm, width 205 mm, manufactured by CertainTeed Corporation) as vinyl chloride resin siding , Length 3,820 mm).
Attaching the starter and deciding where to attach the starter, marking out the horizontal reference, and then attaching the exit and entry corners with screws. The screw had a head diameter of 8 mm and a length of 55 mm, and was able to penetrate the inorganic material reinforced plate layer and be fixed to the vertical frame.
Installation of the exit corner and the entrance corner The installation of the exit corner and the entrance corner is performed from the top, and the uppermost part is the upper end of the screw hole, and the other is the center of the screw hole, and the interval is 500 mm or less. The screws were tightened loosely rather than tightened, and it was confirmed that the projecting corner and the entering corner moved up and down by hand (the same as when other siding members are attached).
Next, install the starter. The distance between the screws for attaching the starter is 455 mm or less. The intervals between the protruding corners at both ends, the entering corners, and the J channel are set at 10 to 20 mm.
Attaching the J channel Install the J channel. The J channel is used around the opening, eaves, and the joint between the second floor wall and the first floor roof. The J channel is also attached to the vertical frame with an interval of 500 mm or less through the inorganic material using the above screws.
Next, a trim is installed in the J channel under the opening and in the horizontal eaves.
Attaching the siding material The siding material is attached in order from the bottom to the top.
A stainless steel tapping screw having a head diameter of 3.0 mm and a length of 50 mm is used to penetrate the inorganic material-reinforced plate-like body layer and fix it to the vertical frame at intervals of 500 mm or less. At this time, the upper fitting portion of the main body and the lower fitting portion of the siding material to be mounted on the upper fitting portion must be properly fitted. Also make sure that the fixed siding material moves left and right. Both ends of the siding material (protruding corners, entering corners, joints with the J channel) are provided with a clearance of about 6 to 15mm, and the main bodies are joined to each other by lap construction. And The width of the overlapped portion is 10 to 25 mm. This clearance and overlap width need to be changed depending on the construction time.
Sealing must not be used for the siding material, between the objects, or between the main body and the object. In addition, sealing must not be used at the joint between a member such as a window frame and a vinyl chloride resin plate.

(2) Evaluation Fire resistance, breathability, waterproofness, moisture permeability, and workability of the outer wall structure in the framed wall construction method of the wooden building of the present invention obtained by the above construction were measured.
The evaluation results are shown in Table 1.

Examples 2-3 and Comparative Examples 1-6
In Example 1, it implemented like the method of Example 1 except having implemented by the method described in Table 1. FIG.
In Example 2, an inorganic material reinforced plate (Dailite Industrial Co., Ltd., “Dailite MS” 9 mm, product number GMS0413-11) was used as an inorganic material reinforced plate (Daiken Industry Co., Ltd.). ) Made of exterior work material “Dielite MS” 12 mm, product number GMS0513-11). Also, the vinyl chloride resin siding was changed to a single-layer vinyl chloride resin siding material (trade name “Hamilton”, 1.0 mm in thickness, 255 mm in width, and 3,640 mm in length) manufactured by Certified Teed Corporation. Used.
Further, in Comparative Example 1, plywood is used for the exterior material layer, in Comparative Example 2, gypsum board is used for the exterior material layer, in Comparative Example 3, the trunk edge is constructed, and cement siding is used for the siding layer. In No. 4, a waterproof sheet was used in place of the moisture-permeable waterproof sheet. In Comparative Example 5, plywood was used as the interior material layer, and in Comparative Example 6, it was used for a building structure having a column beam structure.

  The outer wall structure in the frame wall construction method of the wooden building of the present invention is excellent in fire resistance, breathability, waterproofness, moisture permeability, and workability. Since a wooden building conforming to the Building Standard Law can be constructed at low cost, it is extremely important industrially, and its industrial applicability is very large.

FIG. 1 is a partially cutaway perspective view of an outer wall structure in a framed wall construction method for a wooden building according to an embodiment of the present invention. 2 is a longitudinal sectional view of the outer wall structure shown in FIG. FIG. 3 is an enlarged view of the outer wall structure shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer wall structure 2 Wood 3 Nail 4 Wooden framework 5 Glass fiber or rock wool heat insulation layer 6 Gypsum board layer 7 Plywood layer 8 Inorganic reinforcement layered body layer 8a Inorganic reinforcement layer 8b Inorganic sheet layer 9 Heat resistance and heat insulation structure Wall 10 Moisture permeable waterproof layer 11 Synthetic resin siding layer

Claims (2)

  A framework of wooden construction that consists of a structural wall assembled by striking plywood or gypsum board, etc., on a wooden framework made by joining wood with nails, and a siding layer affixed to the outside of the structural wall In the outer wall structure in the wall construction method, a heat insulating material layer is filled in an interior surrounded by a wooden frame made by joining the wood with nails, a gypsum board layer is pasted on the indoor side of the wooden frame, and the outdoor side A heat-resistant / heat-insulating structural wall assembled by sticking an inorganic reinforced plate-like layer formed from an inorganic foam, a fibrous material, and a binder, and an inorganic reinforced plate-like layer of the heat-resistant / heat-insulating structural wall The outer wall structure in the frame wall construction method of a wooden building, characterized in that it is composed of a moisture-permeable waterproof layer disposed on the outdoor side and a synthetic resin siding layer disposed on the outdoor side   The outer wall structure according to claim 1, wherein the synthetic resin siding layer is a vinyl chloride resin siding material.

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