JP2007146400A - Outside insulation wall structure of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outside insulation wall structure which is free from deformation caused by solar heat, facilitates the securement of fire-proof fire-resistant performance in the case of a fire, allows vapor from the underlying wall of a building to pass from a wet-coated finish surface to the outside of the building, leading to the reduction of condensation, and eliminates the risk of peeling of the wet-coated finish layer. <P>SOLUTION: The outside insulation wall structure is constructed by sticking a heat insulation panel to the front surface of the underlying wall of the building, and applying wet-coated finishing to the external surface of the heat insulation panel. The heat insulation panel is formed of a phenol foamed heat insulation panel having a nonwoven fabric, a woven fabric or fiber-containing paper laminated on the external surface in one body, and then the wet-coated finishing is carried out on the external surface of the phenol foamed heat insulation panel via a reinforcing mesh. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an outer heat insulating wall structure of a building.

Up to now, as for the outer heat insulating wall structure constituted by the heat insulating panel in the building, for example, as in the prior art of Japanese Patent Laid-Open No. 8-1846 (Patent Document 1), the bead method polystyrene foam heat insulating is applied to the base wall of the building. There is a technique in which a panel is attached and wet coating finish such as mortar is applied to the outer surface of the panel through a glass fiber mesh. Here, the beaded polystyrene foam heat insulation panel has a moisture permeability coefficient as large as about 72 ng / m ² · s · Pa (measured by the present inventor) even when the panel thickness is 100 mm, and easily permeates water vapor. Therefore, it is a technology that can reduce the occurrence of dew condensation in the wall by allowing water vapor that has been generated inside the building and permeated through the basement wall to pass through the beaded polystyrene foam insulation panel from the wet finish to the outdoors. Conventionally, it has been widely used.

However, in the technique of Patent Document 1, since the heat deformation temperature of the beaded polystyrene foam is low, the surface temperature of the wall surface is reduced by solar heat due to the thin finish thickness or the direction of the surface to be constructed or the gradient of the wall. When the temperature rises to around 80 ° C., the outer surface is deformed and irregularities appear, which may cause a problem in appearance. Also, in the event of a fire, it was necessary to ensure sufficient fireproofing performance on the basement wall side of the building because the flame was easily spread by igniting the polystyrene foam foam.
On the other hand, as an improved technique for solving the technical problem of Patent Document 1, as in the prior art of Japanese Patent Application Laid-Open No. 2002-235386 (Patent Document 2), phenol having flame retardancy on the foundation wall of a building In recent years, a technology has been developed in which a foam heat insulating panel is attached and a wet coating finish such as mortar is applied to the outer surface of the foam insulating panel via waterproof paper and iron net.

In the technique of Patent Document 2, since a phenol foam heat insulating panel having flame retardancy is used, a problem that the wall surface is deformed by solar heat and a problem that the flame tends to spread by igniting the heat insulating panel at the time of a fire is avoided. Can be done. In addition, mortar and other wet coating finishes are applied to the outer surface of the phenol foam insulation panel via waterproof paper and iron mesh, so the waterproof paper has no water absorption and is due to water absorption of wet coating finishes such as mortar. It was possible to reduce cracks due to stretching and iron wrinkles, and improve mortar workability and wall finishing accuracy.
However, in the technique of Patent Document 2, since water-resistant paper having a small moisture permeability coefficient is interposed on the outer surface of the phenol foam heat insulating panel, water vapor generated in the interior of the building and transmitted through the base wall and the heat insulating panel It was blocked by waterproof paper with a low moisture permeability coefficient, and it was highly likely that moisture would accumulate and cause condensation problems. For example, the waterproof paper specifically shown in the examples includes MT sheet (manufactured by Asahi DuPont) and asphalt felt 430 (JIS A 6005), but obviously has a small moisture permeability coefficient. The MT sheet is a laminated sheet of polypropylene / spunbond nonwoven fabric “Zaburn” and a crosslinked polyethylene foam, and the asphalt felt 430 is obtained by infiltrating asphalt into a base paper made mainly of organic natural fibers.

In addition, because waterproof paper and iron mesh are attached to the outer surface of the phenol foam insulation panel, the vertical in-plane load acting on the phenol foam insulation panel is not only the weight of the mortar wet coating finish, but also waterproof paper and iron. There is an increase in in-plane burden due to the weight of the net, good heat insulation, and concern about condensation in the wall, so when using a phenol foam insulation panel with a relatively large moisture permeability coefficient, that type of phenol foam insulation panel is Because of its low density and low strength, there is anxiety about the adhesiveness at the interface between the phenol foam insulation panel and waterproof paper, especially the base material peeling of the phenol foam insulation panel, and wet coating finishes such as mortar There was concern about delamination. Here, “low density” means a density of 20 to 49 kg / m ³ , and “relatively large moisture permeability” means 10 to 100 ng / m ² · s · Pa.
Furthermore, waterproof paper has no water absorbency and poor wettability, so it has a fixing effect with wet coating finishes such as mortar via iron nets, but also on the adhesion between waterproof paper and mortar. There was a sense of anxiety, and there was also concern about the peeling of the wet coating layer such as mortar.
JP-A-8-1846 JP 2002-235386 A

The problem of the present invention is that there is no problem of deformation due to solar heat in the outer heat insulating wall structure in which a heat insulating panel is pasted on the front surface of the basement wall of the building and wet coating finish such as mortar is applied to the outer surface of the heat insulating panel, Providing an outer heat insulating wall structure that can easily ensure fireproofing in the event of a fire, and allows moisture from the basement wall of the building to penetrate from a wet-finished surface such as mortar to the outdoors, reducing the occurrence of condensation. It is to be.
In addition, because of good heat insulation and concern about condensation in the wall, even when using a phenol foam heat insulation panel with a relatively high moisture permeability, an external heat insulation wall structure that does not cause peeling of wet paint finish layers such as mortar is provided. It is to be.

According to a first aspect of the present invention according to claim 1, in the outer heat insulating wall structure in which a heat insulating panel is attached to the front surface of the ground wall of a building and wet coating is applied to the outer surface of the heat insulating panel, It is characterized by using a phenol foam insulation panel in which nonwoven fabric, woven fabric or fiber mixed paper is laminated and integrated on the outer surface, and wet coating finish is applied to the outer surface of the phenol foam insulation panel through a reinforcing mesh. The outer heat insulating wall structure.
Next, according to a second aspect of the present invention according to claim 2, the moisture permeability coefficient of the phenol foam heat insulation panel is 10 to 100 ng / m ² · s · Pa. It is an outer heat insulating wall structure.

Further, according to a third aspect of the present invention, the inner surface of the phenol foam heat insulating panel is laminated and integrated with a nonwoven fabric, a woven fabric, or a fiber mixed paper, and the front surface of the foundation wall of the building. On the other hand, the phenol foam heat insulation panel is pasted with a mortar or an adhesive via a non-woven fabric, a woven fabric or a fiber mixed paper laminated and integrated on the inner surface. This is an outer heat insulating wall structure.
Finally, 4th invention of Claim 4 by this invention is characterized by the adhesion area of the said phenol foam heat insulation panel affixed with respect to the foundation wall of a building being less than half of the whole area, It is characterized by the above-mentioned. The outer heat insulating wall structure according to claim 3.

  According to the first invention of the outer heat insulating wall structure according to the present invention, as the heat insulating panel, a phenol foam heat insulating panel in which a nonwoven fabric, a woven fabric or a fiber mixed paper is laminated and integrated on the outer surface is used, and a phenol foam heat insulating panel is used. With a structure that has been wet coated with mortar, etc., through a reinforcing mesh on the outer surface of the foam, the flame resistance of the phenol foam insulation panel eliminates the problem of deformation caused by solar heat, making it easy to ensure fire resistance in the event of a fire In addition, non-woven fabric, woven fabric or fiber mixed paper and reinforcing mesh are all entangled with fibrous materials and easily transmit water vapor. Water vapor can be permeated from the wet finish to the outdoors through the phenol foam insulation panel to reduce the occurrence of condensation in the wall.

  In addition, a phenol foam insulation panel in which nonwoven fabric, woven fabric, or fiber mixed paper was laminated and integrated on the outer surface, and wet coating finish such as mortar was applied to the outer surface of the phenol foam insulation panel through a reinforcing mesh. Because of the structure, in addition to the fixing effect with wet coating finishes such as mortar through a reinforcing mesh, the fibrous material constituting the nonwoven fabric, woven fabric or fiber mixed paper and the wet coating finish such as mortar are entangled and fixed Therefore, it is possible to fix a wet coating finish layer such as mortar more firmly. Nonwoven fabrics, woven fabrics or fiber mixed papers and reinforcing meshes are all lightweight, and in particular, use a phenol foam insulation panel with a relatively high moisture permeability because of good heat insulation and concern about condensation in the walls. In other words, even when a low-density and low-strength phenol foam heat insulating panel is used, an outer heat insulating wall structure that does not worry about peeling of a wet paint finish layer such as mortar due to weight load is possible. As a result, a phenol foam heat insulation panel having a low density and good heat insulation can be used, so that an outer heat insulation wall structure with better heat insulation becomes possible.

  Furthermore, because the nonwoven fabric, woven fabric, or fiber mixed paper is integrated with the outer surface of the phenol foam insulation panel, even if an external impact load is applied, etc., unless the structure of the phenol foam base material is destroyed, There is no worry that the wet coating finish will peel off. Such an impact load needs to be so great that the wet coating finish layer is damaged. According to the configuration of the first invention, the phenol foam heat insulating panel and the wet type are used as the outer heat insulating wall structure using the phenol foam heat insulating panel. The coating finish layer has necessary and sufficient adhesion performance.

Next, according to the second invention of the outer heat insulating wall structure according to the present invention, the moisture permeability coefficient of the phenol foam heat insulating panel is 10 to 100 ng / m ² · s · Pa, the moisture permeability coefficient is increased, Since the permeability was further improved, the water vapor generated in the interior of the building and permeating through the basement wall was passed from the wet paint finish to the outdoors through the phenol foam insulation panel without concentrating the water vapor between the joints of the phenol foam insulation panel. Can be transmitted. Here, when the moisture permeability coefficient of the phenol foam heat insulation panel is 10 ng / m ² · s · Pa or less, water vapor tends to concentrate between the joints of the phenol foam heat insulation panel, and the possibility of condensation there increases. Therefore, in the configuration of the second invention, it is appropriately selected to reduce the panel thickness and to select a phenol foam having a large moisture permeability, and the moisture permeability coefficient of the phenol foam heat insulating panel is set to 10 to 100 ng / m ² ···. By setting it within the range of s · Pa, it is possible to further reduce the occurrence of condensation in the wall.

The larger the moisture permeability coefficient, the more significant these effects are. Therefore, the upper limit of 100 ng / m ² · s · Pa has no special meaning, but here the density is 27 kg / m ^3. If the panel thickness is about 10 mm, the moisture permeability coefficient is about 100 ng / m ² · s · Pa. Actually, an external insulation wall structure with a panel thickness of 10 mm or less is also considered. The upper limit was set because it was difficult. Further, in the measurement by the present inventor, for example, if the density is a low density of about 27 kg / m 3, the moisture permeability is 105 ng / m · s · Pa and the panel thickness is 12.5 mm, When the moisture coefficient was 82 ng / m ² · s · Pa and the panel thickness was 100 mm, the moisture permeability coefficient was 10.5 ng / m ² · s · Pa. The moisture permeability coefficient was measured according to a moisture permeability test method for JIS Z 0208 moisture-proof packaging material.

Further, the phenol foam heat insulation panel having a moisture permeability coefficient of 10 to 100 ng / m ² · s · Pa according to the second invention is a low-density phenol foam heat insulation panel having good heat insulation properties, and has an outer heat insulation wall structure with better heat insulation properties. Is possible.
Next, according to the third invention of the outer heat insulating wall structure according to the present invention, a non-woven fabric, a woven fabric or a fiber mixed paper is laminated and integrated on the inner surface of the phenol foam heat insulating panel. Since the phenol foam insulation panel is bonded to the front surface of the wall with a mortar or an adhesive and laminated and integrated on the inner surface via a nonwoven fabric, woven fabric, or fiber mixed paper, the nonwoven fabric, woven fabric Or since the fibrous material which comprises a fiber mixed paper, and a mortar or an adhesive agent are entangled and fixed, it is possible to fix a phenol foam heat insulation panel to the foundation wall of a building more firmly.

  Finally, according to the fourth invention of the outer heat insulating wall structure according to the present invention, the phenol foam heat insulating panel is bonded to the base wall of the building, the bonding area is less than a majority of the entire area. Water vapor generated inside the building and permeating through the basement wall is transferred to the phenol foam insulation panel without being shielded by mortar or adhesive, and through the phenol foam insulation panel, from wet finish to outdoor It is possible to permeate, and it is possible to reduce the occurrence of condensation on the inside of the wall, particularly on the inner surface of the phenol foam insulation panel.

According to the outer heat insulating wall structure according to the present invention, there is no problem of deformation due to solar heat, it is easy to ensure fire resistance at the time of fire, and the nonwoven fabric, woven fabric or fiber mixed paper, and the reinforcing mesh, All are entangled with fibrous materials and easily penetrate water vapor, so the water vapor generated inside the building and permeating the base wall is permeated from the wet paint finish to the outdoors through the phenol foam insulation panel, The occurrence of condensation in the wall can be reduced.
In addition, because it has a structure in which the outer surface of the phenol foam insulation panel is subjected to a wet coating finish such as mortar via a reinforcing mesh, in addition to the fixing effect with a wet coating finish such as mortar via a reinforcing mesh, a nonwoven fabric, Since the fibrous material constituting the woven fabric or fiber mixed paper and the wet coating finish such as mortar are entangled and fixed, the wet coating finish layer such as mortar can be fixed more firmly.

The outer heat insulating wall structure according to the present invention will be described with reference to the drawings.
FIG. 1 is a cutaway perspective explanatory view showing an outer heat insulating wall structure of an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing an outer heat insulating wall structure according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view showing the configuration of the phenol foam heat insulation panel of the embodiment of the present invention.
1 and 2, the outer heat insulating wall structure according to the present invention will be described. The nonwoven fabric 1 b is laminated and integrated on the front and back surfaces of the phenol foam 1 a with respect to the front surface of the lath mortar wall of the building foundation wall 6. The phenol foam heat insulation panel 1 is attached to the inner surface of the inner surface with a mortar 5 so that the adhesion area becomes 40% of the entire area, and the base mortar 2 is applied to the outer surface via a reinforcing mesh 3, A coating finish 4 is applied on top, and a wet coating finish is applied. Here, as the base wall 6, in addition to the lath mortar wall, a reinforced concrete wall, a lightweight cellular concrete wall, a siding wall, and the like are possible.

The phenol foam heat insulation panel 1 shown in FIG. 3 has a low thermal conductivity of 0.020 W / m · K, a thickness of 25 mm, a density of about 27 kg / m ³ , and synthetic fibers (polyethylene terephthalate) on the front and back surfaces. ) The nonwoven fabric 1b was laminated and integrated so that the moisture permeability coefficient of the heat insulating panel was 40 ng / m ² · s · Pa. Here, although the synthetic fiber nonwoven fabric was used as the nonwoven fabric 1b, the glass fiber nonwoven fabric by glass fiber, glass pulp mixed paper etc. which used inorganic fiber for others may be used. Of course, other nonwoven fabrics, woven fabrics, or fiber mixed papers may be used.
As the mortar 5, a resin mortar is used. In addition, modified silicone type, modified silicone / epoxy type, urethane type, and epoxy type organic adhesives can be used.

The reinforcing mesh 3 is made of alkali-resistant glass fibers, but other meshes such as alkali-resistant fibers, aramid fibers, and vinylon fibers can be used.
For the base mortar 2, resin mortar in which cement was mixed with acrylic emulsion was used, but mortar such as resin mortar in which cement was mixed with either ethylene vinyl acetate emulsion or synthetic rubber latex was used. Can do.
Although the acrylic emulsion paint was used for the coating finish 4, other acrylic lysine and acrylic mastic paints, the above resin mortar, mortar, and the like can be used.

  Thus, in the outer heat insulation wall structure which affixes the heat insulation panel 1 to the front surface of the foundation wall 6 of a building, and performs the foundation mortar 2 and the coating finish 4 on the outer surface of the heat insulation panel 1, the nonwoven fabric 1b is used as the heat insulation panel 1. Since it has a structure in which the phenol foam heat insulation panel 1 laminated and integrated on the front and back surfaces and the outer surface of the phenol foam heat insulation panel 1 is provided with the base mortar 2 and the coating finish 4 through the reinforcing mesh 3, the solar heat Because there is no problem of deformation due to fire, it is easy to ensure fire resistance in the event of a fire, and the nonwoven fabric 1b and the reinforcing mesh 3 are both intertwined with fibrous materials, and are easy to permeate water vapor. Water vapor generated in the interior of the room and permeating the base wall 6 is transmitted through the phenol foam insulation panel 1 from the wet finish to the outdoors to reduce condensation in the wall. Then, and ease of securing the anti-fire resistance in case of a fire, it is possible to solve the dew condensation reduction of the wall inside the body at the same time.

Furthermore, the moisture permeability coefficient of the phenol foam heat insulation panel 1 is 40 ng / m ² · s · Pa, and the moisture permeability coefficient is increased to further improve the water vapor permeability. The permeated water vapor can be transmitted from the wet coating finish 4 to the outdoors through the phenol foam heat insulating panel 1 without concentrating the water vapor between the joints of the phenol foam heat insulating panel 1. Here permeance of phenolic foam insulation panels 1 can be in the range of 10~100ng ^/ m 2 · s · Pa, but moisture permeation coefficient at ^{40ng / m 2 · s · Pa} , thermal conductivity 0.020W / By using the phenol foam insulation panel 1 with m · K and thickness 25mm, it is possible to reduce the occurrence of dew condensation in the wall, clear the insulation thickness of the new energy saving standard IV area, and have excellent heat insulation wall structure. Is possible. The moisture permeability coefficient is more preferably in the range of 30 to 100 ng / m ² · s · Pa.

Furthermore, the phenol foam heat insulation panel 1 in which the nonwoven fabric 1b is laminated and integrated on the front and back surfaces of the phenol foam 1a is used, and the outer surface of the phenol foam heat insulation panel 1 is coated with the base mortar 2 and the finish 4 via the reinforcing mesh 3. In addition to the fixing effect of the base mortar 2 and the coating finish 4 through the reinforcing mesh 3, the fibrous material constituting the nonwoven fabric 1b, the base mortar 2 and the coating finish 4 are entangled. Since it adheres, it is possible to adhere the base mortar 2 and the coating finish 4 more firmly.
Furthermore, the nonwoven fabric 1b and the reinforcing mesh 3 are both lightweight, and even if the phenol foam heat insulating panel 1 having a low density of about 27 kg / m ³ and a low strength is used, the foundation mortar 2 and the coating finish 4 due to the weight load can be obtained. An outer heat insulating wall structure that does not cause peeling is possible.

Furthermore, since the nonwoven fabric 1b is integrated with the outer surface of the phenol foam heat insulating panel 1, even when an external impact load or the like is applied, the base mortar 2 is used as long as the structure of the base material of the phenol foam 1a is not destroyed. And there is no worry that the coating finish 4 peels off.
Further, the nonwoven fabric 1b is laminated and integrated on the inner surface of the phenol foam heat insulating panel 1, and the phenol foam heat insulating panel 1 is adhered to the inner surface with an adhesive 5 on the front surface of the foundation wall 6 of the building. Since the structure is affixed via the laminated nonwoven fabric 1b, the fibrous material constituting the nonwoven fabric 1b and the mortar 5 are entangled and fixed. Therefore, the phenol foam heat insulating panel 1 is more firmly attached to the building. It is possible to adhere to the base wall 6.

  Furthermore, since the adhesion area where the phenol foam heat insulating panel 1 is bonded to the base wall 6 of the building is less than a majority of the total area, water vapor generated in the room of the building and transmitted through the base wall 6 Can be transferred to the phenol foam insulation panel 1 without being shielded by the mortar 5 and further transmitted through the phenol foam insulation panel 1 from the base mortar 2 and the coating finish 4 to the outside. It is possible to reduce the occurrence of condensation on the inner surface of the phenol foam heat insulating panel 1.

  The present invention can be suitably used as an outer heat insulating wall structure for a building.

Cutaway perspective view showing an outer heat insulating wall structure of an embodiment of the present invention Cross-sectional explanatory drawing which shows the outer heat insulation wall structure of the Example of this invention Cross-sectional explanatory drawing which shows the structure of the phenol foam heat insulation panel of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Phenolic foam heat insulation panel 1a Phenolic foam 1b Nonwoven fabric 2 Base mortar 3 Reinforcement mesh 4 Coating finish 5 Mortar 6 Base wall 7 Pillar 8 Interior

Claims (4)

A heat insulating panel is attached to the front surface of the foundation wall of a building, and the outer surface of the heat insulating panel is wet-coated. As the heat insulating panel, non-woven fabric, woven fabric or fiber mixed paper is laminated on the outer surface. An outer heat insulating wall structure characterized by using an integrated phenol foam heat insulating panel and applying a wet coating finish to the outer surface of the phenol foam heat insulating panel via a reinforcing mesh. ^2. The outer heat insulating wall structure according to claim 1, wherein the moisture permeability coefficient of the phenol foam heat insulating panel is 10 to 100 ng / m ² · s · Pa. Nonwoven fabric, woven fabric, or fiber mixed paper is laminated and integrated on the inner surface of the phenol foam heat insulation panel, and the phenol foam heat insulation panel is bonded to the front surface of the base wall of the building with mortar or adhesive. The outer heat insulating wall structure according to claim 1 or 2, wherein the outer heat insulating wall structure is affixed to the inner surface via a non-woven fabric, a woven fabric, or a fiber mixed paper laminated and integrated. The outer heat insulating wall structure according to claim 3, wherein an adhesion area of the phenol foam heat insulating panel attached to the base wall of the building is less than a majority of the entire area.

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