JP2002242329A - Externally heat insulating method and building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple and sure construction method which implements external heat insulation of a wooden framework building and mortar finishing of an external wall. SOLUTION: According to the construction method, foamed heat insulation board is arranged on a structural skeleton of the wooden framework building, and wire mesh or lath having ribs at predetermined intervals is attached to columns or studs such that the ribs extend in the horizontal direction. Then, mortar is applied to the wire mesh or lath, whereby the foamed heat insulation board and the mortar are united to the lath having the ribs in one body. As a result, an external wall structure which is prevented from cracking at the mortar portion, small in thickness, light in weight, and mechanically strong, is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying external heat insulation to a painted wall or a painted finish of a wooden frame building.

[0002]

2. Description of the Related Art In a wooden framed wall construction method, after bonding a foamed plastic insulation board to a plywood of a framed wall,
A method of laminating a glass net on the heat insulating board, fixing the glass net to a structural frame with a fastener, applying external heat to the wooden framed wall construction by applying mortar to the surface, and finishing the exterior with mortar. Is being done. In a wooden frame building, a foamed plastics insulation board is provided on the structural body, and a rigid plate such as an inorganic board such as calcium silicate or cement board or a plywood is laminated thereon. Mortar or paint finish.

[0003]

When performing mortar finishing, the mortar alone or together with the base material is subjected to wind pressure,
Outer wall requirements such as earthquake resistance, impact, fire protection, water tightness and durability must be met. In the wooden frame wall construction method, the bending elastic modulus, which is a drawback of the foamed plastics insulation board, is improved by bonding the plywood back to the foamed plastics insulation board and reinforcing the strength.
High mechanical strength to withstand wind positive pressure and negative pressure, shock and earthquake resistance. In addition, by stacking a glass net on the entire surface of the foamed plastic insulation board and fixing it to the structural body with a fastener, and applying mortar on it, it is caused by drying and temperature change of the mortar and expansion and contraction due to heat Prevents cracking. On the other hand, for a wooden framed building, unlike the framed wall method, a foamed plastic insulation board is directly provided on the structural body, but the surface of the insulation board has properties as an outer wall base material such as an inorganic board or plywood. Laminate the underlying material. Without requiring the mechanical strength required for the outer wall of the foam plastic insulation board,
The surface of the outer wall base material is finished with mortar or paint. In addition, joints are provided at the joints of the inorganic board and the plywood of the outer wall base material in order to prevent damage due to expansion and contraction of the outer wall base material due to heat, temperature, water content, etc., and the joint is provided with a caulking treatment. Later, exterior finishing by painting is performed. When applying mortar to the plate-like material, mortar is applied by stacking glass nets on the outer wall base material to prevent cracks at the mortar and joints. When using the plastic insulation board for the external insulation construction method in either the wooden frame wall construction method or the wooden frame construction method, a rigid plate-like material such as plywood is provided inside the heat insulation board, or the plastics insulation board is provided outside. It is necessary to bond the outer wall base material which does not require mechanical strength to the heat insulating board.

Accordingly, an object of the present invention is to provide a plywood with a backing function for supplementing the mechanical strength of a heat insulating board when performing an external heat insulating method using a foamed plastic heat insulating board in a wooden frame building, and to have rigidity on the outside of the heat insulating board. The outer wall base material is not attached, and the original wooden frame structure is easily heat-insulated, while maintaining the mechanical strength of the outer wall, excellent fire protection performance, and cracking even in high heat such as changes in the external environment and flames. This is a method of applying mortar as a thin and lightweight outer wall without durability.

[0005]

Means for Solving the Problems A foamed plastics heat insulating board is provided outside the frame of a wooden frame building, and a wire mesh with ribs is fixed to the structural frame with screws. The ribbed wire mesh is formed by attaching ribs to a wire mesh at a predetermined interval, and includes a rib with a integrally formed rib. Mortar is applied to the ribbed wire mesh. The mortar according to the present invention includes a mixture of water, cement and aggregate, or a resin mortar obtained by mixing a synthetic polymer with the mixture. This makes it possible to easily finish the mortar as the outer wall while providing external insulation to the wooden frame building easily. The foamed plastic insulation board uses foamed plastics such as polystyrene, urethane, phenol, or polyethylene or polypropylene. The compressive strength of the foam plastic board is 0.5k
g / square centimeter or more is preferred. If a foamed plastics insulation board smaller than this is used, the ribbed wire mesh may be buried in the foamed plastics insulation board when laminating the wire mesh with ribs, and in the mortar construction, the mortar is formed by the metal mesh and the insulation board. And the wire mesh does not function to improve the mechanical strength of the mortar or to prevent cracking. FIG. 1 shows a wire mesh with ribs welded at predetermined intervals. FIG. 2 shows an example in which a lath and a wire mesh are integrally manufactured, and a structure in which ribs protrude from the lath surface at predetermined intervals in a convex shape is used. The ribbed wire mesh is provided such that the rib is in direct contact with the foamed plastics heat insulating board to provide a gap between the wire mesh and the heat insulating board. By this construction method, the ribbed wire mesh can be constructed with less eccentricity in mortar or resin mortar. By embedding the wire mesh of the wire mesh with ribs in a mortar or a resin mortar, the mortar is exposed to high heat due to a flame, etc. Can be performed. The rib portion of the ribbed wire mesh fixed to the structural frame is a mortar or a resin mortar serving as an outer wall to improve the flexural modulus required for wind pressure or external impact, and to prevent pull-off from the structural frame. Is responsible for. When the mechanical strength against bending of the rib is insufficient with the rib with a rib in which the rib and the lath are integrally formed, the mechanical strength of the rib with the rib can be increased by fitting a metal rod into the concave portion of the rib and attaching it to the structural frame. I can do it.

A heat insulating board made of foamed plastics is provided directly on a wooden frame structure, and the heat insulating board is stacked on the heat insulating board so that the ribs of the metal mesh with ribs are oriented in the horizontal direction. Join at the posts or studs. By applying mortar to this, a composite structure in which the foamed plastic insulation board, the wire mesh with ribs and the mortar are integrated can be obtained. This composite structure has a large flexural modulus and satisfies the necessary requirements for the outer wall material. By such means, it is possible to complete the external insulation work on the structural frame and the mortar finish as the external wall.

The exterior finish of the mortar is completed by a coating process, but when the mortar is to be tile-coated, the mortar is laminated on a heat insulating material with the ribs of the ribbed wire mesh outside. Apply mortar to the wire mesh so that a part of the rib is visible.
The ribs are used as horizontal guides for applying tiles, and tiles are applied immediately after mortar application and buried in the mortar, so that the tiles are supported by the ribs, and it is possible to prevent the tile from dripping or falling. Easy and efficient construction.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A foamed plastic insulation board is provided on a pillar of a structural frame of a wooden frame building so that a joint portion of the insulation board becomes a pillar or a stud. The ribs are stacked on the board side, and the ribs are fixed to the structural body via the heat insulating board using screws.
As a result, a gap of about 3 to 10 mm corresponding to the height of the rib is formed between the heat insulating board and the wire mesh, and the wire mesh is easily buried with mortar or resin mortar. The ribbed wire mesh is obtained by welding metal ribs to the wire mesh. For the ribbed lath, ribs that are convex on the lath are machined at predetermined intervals when the lath is manufactured. The ribs are not of a net structure but of a structure in which a steel plate is manufactured by folding plate processing to increase the mechanical strength. The shape of the wire mesh or lath is rhombic, rectangular, or the like, and the size of the mesh has an equivalent area of 1 square centimeter or more and 3 square centimeters or less. The thickness of the wire mesh is 0.3 mm to 0.7 mm, but is not particularly limited. The flexural strength of the rib depends on the thickness of the foamed plastic insulation board and the thickness of the mortar applied to the ribbed wire mesh, but the rib direction of the composite structure in which the ribbed wire mesh is embedded in the foamed plastic insulation board and the mortar is applied. Flexural strength of JISA1414
Any material may be used as long as it has a bending fracture load of 800 kg / m 2 or more in the “test method for performance of building components (panels) and its components”. Since the lath with ribs and the ribs are integrally formed of the same steel plate, when the rib strength is insufficient, the rib strength is reinforced by fitting a metal rod into the recess of the rib.

In the case of a lath with ribs, the strength of the joint between the lath and the adjacent lath is improved by overlapping the concave portion of the rib with the lath. The mortar is undercoated and overcoated. The undercoat is thick enough to embed a wire mesh or lath with ribs, and the overcoat is thick enough to secure the strength of the outer wall. The total of the undercoat and the overcoat is 7 mm or more.

[0010]

Example 1 A foamed polystyrene board having a thickness of 50 mm was attached to a wooden frame by nails. 10mm x 27m
m on a lath with a 45-degree diamond-shaped mesh at intervals of 75 mm,
A rib with a rib having a trapezoidal rib having a cross section of 3 mm on the upper side, 6 mm on the lath side, and 5 mm in height was fastened from the rib portion to the structural body with a 100 mm long screw so that the rib was in contact with the heat insulating board. . The horizontal spacing of the screws was 455 mm and the vertical spacing was 225 mm. Mortar was applied to the entire surface. The thickness of the mortar was 10 mm. The flexural fracture strength of the mortar composite structure of the heat insulating board and the lath with a rib according to JIS A1414 is 12 in this embodiment.
It was 00 kg / square meter.

[0011]

Example 2 In Example 1, the lath with the ribs was laminated on the heat insulating material with the ribs on the outside (front) side. Mortar was applied so that the surface of the rib could be visually observed. Tiles with dovetails on the back were buried between the ribs. The joint part of the tile was filled with joint mortar, and the exterior insulation work was performed by tile exterior finishing.

[0012]

According to the construction method according to the present invention, external insulation can be easily constructed on a traditional wooden frame building. In the conventional inner heat insulation method of loading a heat insulating material between pillars, dew condensation in the wall becomes a problem. However, dew condensation in the wall does not occur due to the outer heat insulation construction, and the durability of the house is dramatically increased. Further, since the wire mesh with ribs is stacked on the foamed plastics heat insulation board and mortar is applied, the construction is simple, and the strength and life of the mortar are increased because the mortar contains a wire mesh. In the absence of ribs, plywood construction was necessary inside the insulation board to ensure wind resistance and impact resistance, but using a wire mesh with ribs enabled construction methods that did not require plywood construction. . The efficiency of tile construction has dramatically improved compared to conventional tile construction.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wire mesh with ribs.

FIG. 2 is a sectional view of a rib with a rib.

FIG. 3 is a configuration diagram of external heat insulation of a tile exterior finish buried between ribs.

[Explanation of symbols]

 1: wire mesh 2: rib 3: lath 4: tile 5: thermal insulation

Claims (3)

[Claims] 1. A wooden structure in which a foamed plastic insulation board is provided from the outside of a structural frame of a wooden frame building, a wire mesh with ribs is laminated on the heat insulating board and fixed to the structural frame, and mortar is applied to the wire mesh with ribs. External insulation construction method for framed buildings 2. A method according to claim 1, wherein tiles are attached to the mortar along the ribs. 3. A building having the structure of claim 1 or 2.