JPH09125539A - Heat insulating board for foundation and foundation heat insulation airtight construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the high heat insulating property and high airtightness between foundation/ground sill portions by having a foundation heat insulating board provided with an airtight film on a synthetic resin foam board giving work execution to the board, at a foundation rise section, and fixing the ear section of the airtight film to the side face of the ground sill. SOLUTION: An airtight film 12 is provided on one side surface of a synthetic resin foam board 11 while an ear section 12a capable of covering the upper end face of the foam board 11 is extended, and a foundation heat insulating board 10 is formed. A resin mortar layer is preferably formed on the surface of the foam board 11 on the opposite side to the installed face of the airtight film 12. The foundation heat insulating board 10 is executed at the rise section of a foundation 101 while the installed face of the airtight film 12 is located on the concrete foundation 101 side. The ear section 12a of the airtight film 12 is fixed to the side face of a ground sill 105, and airtightness processing is applied between the foundation 101 and the ground sill 105.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basic heat insulation construction method in which a space under a floor is a space inside a building, and more particularly to a technique for improving heat insulation / airtightness between a foundation and a base in a wooden house.

[0002]

2. Description of the Related Art Conventionally, in wooden houses, various measures have been taken in order to secure heat insulation and airtightness, and to improve durability and living environment. For example, on the floor surface, a heat insulating layer or a moisture-proof layer is generally provided under the floor, and a moisture-proof treatment is also performed on the floor base plate surface.

In the above-mentioned general floor surface insulation method, when the underfloor space has a low temperature during the heating period and stagnation of moist air occurs on the entire underfloor surface, dew condensation occurs. Therefore, a ventilation opening is provided in the cloth foundation. However, if the ventilation holes do not provide sufficient ventilation, or if the floorboard surface is not sufficiently moisture-proof, the underfloor space cannot be made sufficiently dry, especially in cold regions with dew condensation, which occurs under the floor. Decay of wood due to Namidatake, a kind of decay fungus, has been a problem.

In order to solve various problems caused by the floor insulation method, the basic insulation method has been widely used in recent years, especially in cold district houses. The basic insulation method is
As shown in FIG. 8, the heat insulating material 102 is applied to the rising portion of the foundation 101, and a conventional construction method will be briefly described.

The heat insulating material 102 is installed inside (or as a mold of) the cloth foundation mold, and concrete is poured up to several cm below the upper end of the heat insulating material. When the formwork is removed after hardening of the concrete, the heat insulating material and the wall surface of the cloth foundation are bonded and integrated. Level-adjusted leveling mortar 103 is applied to the upper surface of the cloth foundation, and the heat insulating material 102 is cut according to the level of the leveling mortar 103. In the foundation heat insulation method, since airtightness between the foundation and the foundation is required, the packing material 104 is laid on the leveling mortar 103, and then the foundation 105 is fixed.

As described above, the foundation insulation method thermally insulates the underfloor space from the outside space by insulating the foundation surface,
This is a construction method in which the space under the floor is used as the space inside the building. Because of this,
There is no need to install a heat insulating layer or a moisture proof layer on the floor surface, and there is no need to provide a ventilation opening in the cloth foundation.

[0007]

However, in the above-mentioned conventional basic heat insulation construction method, if the level of the leveling mortar 103 is poor, the airtightness between the foundation and the base is sufficiently high even if the packing material 104 is laid. There was a problem that it could not be constructed and caused adiabatic defect.

Further, as the heat insulating material 102, a plastic heat insulating material such as polystyrene foam or urethane foam which does not retain water is generally used. Such a heat insulating material is an anti-termite agent or an antiseptic agent applied to a base or a pillar. There is also a problem that some of them melt due to this, and there is also a problem that this insulation causes a heat insulating defect. Further, when expanded polystyrene is used as the heat insulating material, there is a problem that the surface is deteriorated by ultraviolet rays before the surface is finished. Further, since the heat insulating material 102 is in a state of protruding from the upper surface of the foundation after the mold is removed and before the leveling mortar is applied, the heat insulating material made of the foam may be damaged by an operator's trampling or the like. ,
There is also a problem that adiabatic defect occurs due to such damage.

In view of the above-mentioned circumstances, the present invention provides a novel basic heat insulation and airtight construction method capable of realizing high heat insulation and airtightness of the foundation / base part of a wooden house, and a foundation heat insulation plate used in the construction method. For the purpose of provision.

[0010]

The configuration of the present invention which has been achieved to achieve the above object is as follows.

That is, the first aspect of the present invention is that an airtight film is attached to the upper part of the one side surface of the synthetic resin foam plate with an ear portion capable of covering the upper end surface of the foam plate being exposed. It is a characteristic heat insulating plate for foundation.

The first heat insulating plate for foundation of the present invention further has a feature that "the ears of the airtight film are extended to one side or two sides of the synthetic resin foam plate". , "A resin mortar layer is formed on the surface of the synthetic resin foam plate opposite to the surface on which the airtight film is provided".

A second aspect of the present invention is to apply the above-mentioned heat insulating plate for foundation of the first aspect of the present invention to a foundation rising portion with the airtight film-attached surface as a base side, and to use the airtight film to make a foundation / This is a basic adiabatic airtight construction method characterized by performing airtight treatment between the foundations.

The second basic heat insulating and airtight construction method of the present invention is further characterized by "fixing the ear portion of the airtight film to the side surface of the base" and "installing the foundation heat insulating plate at the foundation rising portion". In this case, it is used as a formwork ”.

In principle, the heat insulation position in the foundation heat insulation method is outside the foundation, but the present invention is not limited to this, and can be applied to inside or both sides heat insulation. Further, the present invention can be applied not only to the cloth foundation but also to the foundation of the earth floor. However, when applied to the foundation of the earth floor, it is limited to external insulation.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A typical example of a foundation heat insulating plate of the present invention is shown in FIGS. In the figure, 11 is a synthetic resin foam plate, 12 is an airtight film, and the foundation heat insulating plate 10 of the present invention has these as essential constituent members.

In the foundation heat insulating plate of the present invention, the synthetic resin foam plate 11 has an ear portion 12a of a size large enough to cover the upper end surface (end surface A in FIG. 1) of the upper surface on one side. The airtight film 12 is attached. The up-down direction of the foundation heat insulating plate 10 corresponds to the up-down direction when it is used in the basic heat insulating airtight construction method of the present invention described later.

In FIG. 1 (a), the width of the airtight film 12 is equal to the width W of the synthetic resin foam plate 11, and the ear portion 1 in the side direction.
2a is not protruding, FIG. 1 (b) shows that the ear portion 12a extends in the side 1 direction, and FIG. 1 (c) shows that the ear portion 12a extends also in the side 2 direction. Shows an example of.

Although the width W of the synthetic resin foam plate 11 can be freely set, it is usually 50 in consideration of the transportability and the site workability.
It is about 0 to 2500 mm. The height H can be appropriately set according to the height of the rising portion of the foundation to be constructed, and is usually several cm higher than the height of the rising portion of the foundation. The thickness is determined in consideration of the design environment temperature and the like for each area, and is usually about 50 mm to 100 mm.

As the material of the synthetic resin foam plate 11, a material having excellent heat insulating property is used, and it is particularly preferable that it has no water retention property and excellent durability. For example, polystyrene foam or hard urethane foam. , Phenol foam and the like.

When the synthetic resin foam plate 11 is made of a material such as polystyrene foam which is likely to be deteriorated by ultraviolet rays until the exterior finish, as shown in FIG. It is preferable to form a resin mortar layer 13 on the surface of the resin (FIG. 2 is shown in FIG.
An example in which a resin mortar layer is added to the above configuration is shown. ).

The resin mortar layer 13 can be formed by coating resin mortar slag on the surface of the synthetic resin foam plate, and the coating thickness is usually about several mm. Specifically, for example, a resin mortar obtained by adding 0 to 100 parts of silica powder, 5 to 25 parts of a resin such as styrene butadiene latex, and 50 to 100 parts of water to 100 parts of cement can be used.

Further, instead of adding the resin mortar layer, by bonding a calcium silicate plate, a flexible board or the like, it is possible to use the foundation heat insulating plate of the present invention also as an exterior.

As the material of the airtight film 12, a material having excellent moisture resistance and airtightness is used, and examples thereof include a polyethylene film and a vinyl chloride film. Particularly preferred are those having excellent weather resistance and chemical resistance. For example, a polyethylene film to which various additives are added is desirable. The thickness of the airtight film 12 is usually 10
It is about 0 to 200 μm.

The airtight film 12 is a synthetic resin foam plate 11.
Is attached to the upper part of one side surface, and particularly preferably to the upper end. It will be described in detail later that the airtight film 12 is attached to the lower part of the synthetic resin foam plate 11 as will be described in detail later, but when the airtight film 12 is applied to the foundation rising part with the airtight film attachment surface facing the foundation (see FIG. 3), The adhesion between the rising part and the heat insulating plate for foundation is hindered.

Further, the airtight film 12 is attached with the ear portion 12a of a size large enough to cover the upper end surface of the synthetic resin foam plate 11. That is, the height h of the ear 12a
(See FIG. 1) is equal to or larger than the thickness of the synthetic resin foam plate 11.

Airtight film 12 on synthetic resin foam plate 11
The attachment can be performed, for example, by applying a hot melt adhesive to the airtight film in advance and adhering it with a hot roll or the like.

Next, an example of one embodiment of the basic adiabatic airtight construction method of the present invention will be specifically described with reference to FIG. Incidentally, FIG. 3 shows an example of the outer heat insulation construction of the cloth foundation by the foundation heat insulation airtight construction method of the present invention.

First, the foundation heat insulating plate 10 of the present invention described above.
As shown in FIG. 3 (a), the end face A is placed on the upper side and the attached surface of the airtight film 12 is placed on the base side at the rising portion of the base 101.

Specifically, the heat insulating plate 10 for the foundation is provided on the inner surface of the foundation form with the airtight film-attached surface on the concrete pouring side.
, Or the foundation heat insulating plate 10 itself is used as a mold for the foundation rising portion, and concrete is poured while the end face A is covered with the airtight film 12 to form the foundation.

At this time, the foundation is formed so that the level of the upper surface thereof is slightly lower than the upper end of the synthetic resin foam plate 11 (corresponding to the thickness of the leveling mortar described later). Further, preferably, the height at which the airtight film 12 and the foundation rising portion come into contact with each other is about several cm. As a result, the foundation after foundation hardening and the heat insulation board for foundation 1
0 is integrated, and the airtight film 12 is also integrated with the base. When the height at which the airtight film 12 and the foundation rising portion contact each other is larger than necessary, the foundation and the foundation heat insulating plate 1
It is preferable that the contact height is 10 cm or less because the integration of 0 may be alienated and adiabatic defect may occur.

As described above, when the basic heat insulation plate of the present invention is used to perform basic heat insulation, the upper surface of the synthetic resin foam plate 11 can be covered with the ears 12a of the airtight film 12,
Since this portion can be reinforced by this, it can contribute to the prevention of damage to the foundation heat insulating plate by an operator or the like.

Subsequently, as shown in FIG. 3B, the leveling mortar 103 is applied to the upper surface of the foundation until the level is approximately the same as the level of the synthetic resin foam plate 11, and the leveling mortar 103 is placed on the leveling mortar 103. After laying packing material 104, base 1
Fix 05. Further, structural members such as pillars 106 are fixed on the base 105, and the legs of the pillars 106 and the base 105 are fixed.
An anti-termite agent or an antiseptic agent is applied to.

At this time, the polyethylene film or the like suitably used as the airtight film 12 is made of the synthetic resin foam plate 1.
Since it has excellent chemical resistance as compared with the polystyrene foam used in 1), by covering the upper surface of the synthetic resin foam plate 11 with the ear portion 12a of the airtight film 12,
It can also function as a protective layer against termites and preservatives.

Then, the ear portion 12a of the airtight film 12 covering the upper surface of the synthetic resin foam plate 11 is fixed to the side surface of the base 105. As a result, a continuous airtight layer is formed on the foundation / base, and airtightness between the foundation / base can be secured. Further, the airtight sheet 107 that is constructed on the outside of the wall
It is particularly preferable to fix the (windproof or moistureproof sheet) and the ear portion 12a of the airtight film 12 to the base 105 in a state of being overlapped with each other, thereby forming a continuous airtight layer on the foundation / base / wall. You can

Further, by properly combining the heat insulating materials for foundation as shown in FIGS. 1 (a) to 1 (c), the airtightness between the foundation and the foundation can be secured even in the joint portion of each heat insulating material. . A specific example is shown in FIG. FIG.
1A shows the case where the foundation heat insulating plate as shown in FIG. 1B is used, and FIG. 4B shows the foundation heat insulation as shown in FIGS. 1A and 1C. This is an example of using plates in combination.

As shown in FIG. 4, at the mating portion of each heat insulating material, one heat insulating material is always combined so as to have the ears 12a also in the lateral direction, so that the ears 12a are overlapped with each other. Can be fixed to the base. At this time, in order to ensure sufficient airtightness even in the overlapping portion of the ears 12a, the synthetic resin foam plate 11
Width w of the ear portion 12a protruding in the lateral direction of the body (see FIG. 1)
Is preferably 100 mm or more, and particularly preferably about 150 mm to 300 mm.

As described above, if the foundation heat insulation is performed using the foundation heat insulation plate of the present invention, the foundation and the base are sealed with the airtight film 1.
Since the two can be connected, even if the level of the leveling mortar 103 is poor, the airtightness between the foundation and the foundation can be ensured, and the packing material 104 between the foundation and the foundation can be omitted. The ear portion 12a of the airtight film 12 is attached to the base 10
The air-tightness between the foundation and the foundation can be secured by temporarily fixing it to the No. 5 with a tacker or the like and then fixing it with a heat insulating material of the wall or a draining board, and the packing material 104 between the foundation and the foundation can be secured.
Can be omitted.

If the finishing level of the leveling mortar 103 is lower than the upper end of the synthetic resin foam plate 11,
It is preferable to use the foundation heat insulating plate of the present invention as shown in FIG.

In the foundation heat insulating plate 10 of FIG. 5, the airtight film 12 is attached to the synthetic resin foam plate 11 in a region B from the end face A to a certain level (usually 10 cm or less is sufficient). Adhesion is performed, and the remaining area C is adhered. In such a foundation heat insulating plate 10, since the upper portion of the synthetic resin foam plate 11 can be cut without peeling the airtight film 12 from the synthetic resin foam plate 11, the upper surface of the synthetic resin foam plate 11 can be easily leveled. It can be adjusted to the finishing level of the mortar 103.

In the foundation heat insulation airtight construction method of the present invention, various methods are conceivable as a method of performing airtight treatment between the foundation and the foundation using the airtight film of the foundation heat insulation plate.
Construction examples other than those shown in (b) are shown in FIGS. However, the basic heat insulating and airtight construction method of the present invention is not limited to these.

6 and 7 show an example of construction in which the airtight film 12 of the foundation heat insulating plate is wound under the base 105, and FIG. 6 is a combination with the airtight sheet 107 constructed on the outside of the wall. This is due to the combination with the airtight sheet 108 installed inside the seven walls. In these cases, as in the previous example, foundation / base or foundation / base /
A continuous airtight layer can be formed on the wall.

Although the example of the outer heat insulation construction for the cloth foundation has been described above, the basic heat insulation airtight construction method of the present invention is not limited to this, and it can be applied to the inner heat insulation of both sides or the ground floor of the earth floor. However, the construction in those cases can be performed according to the construction procedure described above, and the operation and effect thereof are also the same as those described above.

[0044]

As described above, according to the basic heat insulating airtight construction method using the basic heat insulating material of the present invention, the following effects can be obtained. (1) By fixing the airtight film of the foundation heat insulating plate to the base, a continuous airtight layer can be formed on the base / base, and the airtightness between the base / base can be easily and reliably ensured. . Furthermore, since the airtightness between the foundation and the foundation can be ensured even if the level of the leveling mortar is low, the packing material laid between the foundation and the foundation can be omitted. (2) The upper surface of the synthetic resin foam plate can be covered with an airtight film, and a polyethylene film or the like used as such an airtight film is superior in chemical resistance to polystyrene foam or the like used as the synthetic resin foam plate. Therefore, it is possible to prevent the synthetic resin foam plate from being melted by the ant-preventive agent or the preservative applied to the pillar and the base, and to prevent the generation of the heat insulating defect due to the melting. (3) Since the upper surface of the synthetic resin foam plate can be covered with an airtight film, the operator steps on the synthetic resin foam plate that is protruding from the upper surface of the foundation after the foundation mold is removed and before the leveling mortar is applied. It can be prevented from being damaged due to such damages, and the generation of a heat insulating defect due to this damage can be prevented. (4) To prevent the synthetic resin foam plate from deteriorating due to ultraviolet rays before the exterior finishing when using a heat insulating material for the foundation having a resin mortar layer formed on the surface opposite to the airtight film-attached surface. It is possible to prevent the generation of adiabatic defect due to this deterioration. (5) By exerting the above effects, overall /
Insulation and airtight treatment of the soil part can be performed with extremely high reliability.

[Brief description of the drawings]

FIG. 1 is a view showing an example of a foundation heat insulating plate of the present invention.

FIG. 2 is a view showing an example of a foundation heat insulating plate of the present invention to which a resin mortar layer is added.

FIG. 3 is a diagram for explaining a basic heat insulating and airtight construction method of the present invention.

FIG. 4 is a diagram for explaining an example of construction of a base heat insulating plate mating portion in the basic heat insulating airtight construction method of the present invention.

FIG. 5 is a diagram showing another example of the foundation heat insulating plate of the present invention.

FIG. 6 is a diagram showing an example of construction by the basic heat insulating and airtight construction method of the present invention.

FIG. 7 is a diagram showing an example of construction by the basic heat insulating and airtight construction method of the present invention.

FIG. 8 is a diagram for explaining a basic heat insulation method of a conventional example.

[Explanation of symbols]

 10 Heat Insulation Plate for Foundation 11 Synthetic Resin Foam Plate 12 Airtight Film 12a Ear 13 Resin Mortar Layer 101 Concrete Foundation 102 Heat Insulation Plate 103 Leveling Mortar 104 Packing Material 105 Base 106 Pillar 107 Airtight Sheet

Claims (6)

[Claims] 1. A heat insulating plate for a foundation, characterized in that an airtight film is attached to an upper part of one surface of a synthetic resin foam plate with an ear portion capable of covering an upper end surface of the foam plate being exposed. . 2. The heat insulating plate for a foundation according to claim 1, wherein the ear portion of the airtight film extends in one side or two sides of the synthetic resin foam plate. 3. The heat insulating plate for a foundation according to claim 1, wherein a resin mortar layer is formed on the surface of the synthetic resin foam plate opposite to the surface on which the airtight film is attached. 4. The foundation heat insulating plate according to any one of claims 1 to 3 is applied to a foundation rising portion with the airtight film-attached surface as a foundation side, and the airtight film is used to provide a space between a foundation and a foundation. A basic heat-insulating airtight construction method characterized by performing the airtight treatment of 5. The foundation heat insulating and airtight construction method according to claim 4, wherein the ear portion of the airtight film is fixed to a side surface of the base. 6. The foundation heat insulation airtight construction method according to claim 4, wherein the foundation heat insulation plate is used as a form at the time of constructing a foundation rising portion.