JPH0988201A - Method of outside heat-insulating construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability and to prevent dew condensation more completely. SOLUTION: In a method of outside heat-insulating construction in which heat-insulating materials are installed on the outdoor side of a separation wall, a plurality of heat-insulating materials (12, 13) are laminated while a resin sheet material 14 is interposed between the heat-insulating materials. The resin sheet material forms a waterproof layer. The waterproof layer is not brought into contact with a separation wall 11 and a sheathing material 16, and held between the heat-insulating materials and protected. Not only a wall but also a roof, a floor, a ceiling, etc., may be applied as the separation wall 11. The heat-insulating materials and the sheet material can also be formed in the layers or more. According to the method of construction, an excellent soundproof effect is also obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an outer heat insulating construction method in which a heat insulating material is provided on the outdoor side of a boundary wall.

[0002]

2. Description of the Related Art The so-called outside insulation method in which a heat insulating material is placed on the outside of a boundary wall such as a wall, roof, or floor has a structure in which the building is wrapped from the outside, so that the number of breaks in the heat insulating material is reduced and the heat insulating efficiency is reduced. Is advantageous in that. In addition, there is an advantage that local dew condensation is unlikely to occur at a cold heat bridge or a corner portion, which is a problem in a bolt penetration portion or a cut of a heat insulating material. Furthermore, when used in a concrete building, a concrete wall with a large heat capacity functions as a heat storage material to prevent a sudden drop in room temperature and wall temperature, so heating was stopped, for example, at bedtime or when going out. Also in this case, it is possible to effectively suppress the occurrence of dew condensation.

On the other hand, even in such outer heat insulation, it is necessary to install some exterior finishing material on the outside of the heat insulating material, so that moisture that has entered from the seams or cracks of the boundary wall will condense on the inner surface of the exterior material. However, there may be a problem that the heat insulating material is wetted or watered to lower the heat insulating property or the heat insulating material is deteriorated. Further, in the summer when the outside air is hot and humid and the indoor temperature is low, there is a problem that dew condensation tends to occur rather than the inner heat insulation provided with a heat insulating material on the indoor side of the boundary wall.

On the other hand, as an improvement of such outer heat insulation, for example, Japanese Patent Laid-Open No. 3-87441, a water impermeable layer for blocking moisture is formed between a boundary wall and a heat insulating material. As shown in FIG. 4, a film material 3 is disposed on the surface of a base material (boundary wall) 2 such as a gypsum board attached to a stud 1, and a heat insulating material 4 and an exterior finishing material 5 are sequentially laminated. The film material 3 is made of, for example, a sheet material obtained by laminating rubberized asphalt and polyethylene film, and blocks air, water, and steam to prevent moisture in the room from entering the heat insulating layer 4 from seams or cracks in the base material. .

[0005]

By the way, such a conventional outer insulation method has the following problems even in Japanese Patent Laid-Open No. 3-87441, and there is still room for improvement.
The first issue is durability. Structures are subject to various vibrations from the ground on a daily basis, such as vibrations caused by cars running on nearby roads and trains running on railroads. In Japan, they are often subject to shaking and vibration due to earthquakes. . On the other hand, in the method disclosed in Japanese Patent Laid-Open No. 3-87441,
Since it has a structure in which the waterproof membrane is directly adhered to the base material,
The vibration of the base material may scratch and damage the waterproof film. For example, even if a comparatively small earthquake that does not damage the base material, the relative displacement vibration between the base material and the exterior material due to the shaking causes the base material and the exterior material to be disposed. There is a concern that the base material may be scratched and scratched by the base material as it extends to the waterproof membrane that is in close contact with the material. If the surface of the base material is smooth, it will be less damaged, but when applying a waterproof film to an exposed concrete surface such as an RC building, the unevenness of the surface of the base material may damage the waterproof film. Are likely to cause cracks and tears.

Further, since the waterproof film adhered to the base material is directly subjected to the temperature change of the base material, in a region where there is a large difference in temperature between summer and winter, such as Hokkaido, years after construction As a result, the membrane itself may become fragile, or the joints between the waterproof membranes and the adhesive portion to the boundary wall may deteriorate and the airtightness may decrease. In particular, the waterproof film has a lower strength than the base material and the exterior material, and the damage (holes and cracks) in one part greatly impairs its function (overall airtightness). It is desirable to take some measures to protect the.

Secondly, there is a problem of dew condensation when the temperature and humidity are high outdoors (for example, in summer). As described above, in the summer when the outdoors are hot and humid, the outer heat insulating layer is generally more likely to cause dew condensation than the inner heat insulating layer. However, the same is true in Japanese Patent Laid-Open No. 3-87441.
That is, the water vapor that has penetrated into the wall from the exterior material side is blocked by the waterproof film, but since this waterproof film is in close contact with the base material, it will be directly affected by the base material temperature. Condensation occurs on the waterproof membrane.

Further, in Japanese Patent Laid-Open No. 3-87441, FIG.
As shown in FIG. 3, in order to discharge the water that has entered the heat insulating material 4 through the defective portion of the outer material 5 to the outside, a drain hole 7 that penetrates the outer material 5 and the heat insulating material 4 and reaches the waterproof film 3 is formed at the lower end. The structure formed on the portion (upper part of the foundation 6) is shown, and it is considered that dew condensation water can be discharged from the water drain hole 7, but providing such a water drain hole complicates the wall surface structure. , The construction is complicated and the cost is increased.

Therefore, an object of the present invention is to obtain a new outer heat insulating construction method having excellent durability and capable of completely preventing dew condensation.

[0010]

In order to achieve the above object and solve the problems, the outer insulation method according to the present invention is a method of laminating a plurality of heat insulating materials on the outdoor side of a boundary wall and It is characterized in that a resin sheet material is interposed therebetween.

[0011]

In the heat insulation method according to the present invention, the resin sheet material is interposed between the heat insulation materials laminated on the outdoor side of the boundary wall, and this sheet material blocks the flow of moisture (water vapor) invading the wall. To do. For example, in the winter (heating period), the water vapor in the room permeates to the outside where the water vapor pressure is lower,
The sheet material arranged between the heat insulating materials blocks the flow of this water vapor, and the indoor moisture does not penetrate the heat insulating material to reach the outer covering material, so that it easily occurs at the boundary between the outer covering material and the heat insulating material. It is possible to prevent dew condensation on the wall.

On the other hand, even in the summer when the flow of water vapor is reversed from the outdoor direction to the indoor direction, the sheet material arranged between the heat insulating materials blocks moisture and prevents water vapor permeated from the outside air from reaching the boundary wall. Moreover, since the sheet material is separated from the boundary wall via the heat insulating material, even if the temperature in the room is lower than the outside air, the dew point on the surface of the sheet material does not easily fall below the dew point, and the occurrence of dew condensation in the wall can be prevented. I can.

Further, since the sheet material is held between the heat insulating materials and does not come into contact with the boundary wall or the exterior material, it is not directly affected by the temperature change of the boundary wall and the like, and is not easily damaged mechanically. As the heat insulating material, various existing heat insulating materials, for example, foamed plastic foam, Styrohome (trade name), Styrofoam, etc. can be used, and as the sheet material, polyethylene film, vinyl sheet, plastic sheet, rubber sheet, etc. It is possible to use various types of resin sheet materials. Furthermore, since the heat insulation method of the present invention can be applied not only to walls but also to roofs, floors, ceilings, etc., the term "boundary wall" as used in the present specification does not mean only walls, but roofing materials and floors. It also means materials, ceiling materials, etc.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view showing an example of a heat insulating structure by an outer heat insulating method according to the present invention. As shown in the figure, in this construction method, while the heat insulating materials 12 and 13 are laminated on the outdoor side of the boundary wall 11, the resin sheet material 14 is interposed between the laminated heat insulating materials 12 and 13. As the heat insulating materials 12 and 13, for example, foamed plastic foam, foamed polyethylene foam, Styrohome (trade name), Kanelite foam (trade name), Sunnylite (trade name), Styrofoam, urethane foam, etc. can be used. Also, various existing heat insulating materials can be used. Incidentally, reference numeral 15 in the drawing is an exterior finishing material. Further, an interior material such as a cloth may be appropriately provided inside the boundary wall 11 (inside surface of the room).

As the sheet material 14, various resin sheet materials such as polyethylene film, vinyl sheet, plastic sheet, rubber sheet, asphalt roofing, moisture-proof cellophane, etc. can be used. Further, this sheet material is not limited to a single material, but a combination of two or more kinds of materials, for example, a paper material sandwiched between a plurality of (for example, two) resin sheet materials, or a paper material. A polyethylene laminated paper in which polyethylene is laminated on the material, or a laminated foil in which an aluminum foil and the above various resin sheet materials are laminated for the purpose of blocking radiation are also usable. The sheet material 14 is preferably flexible from the viewpoint of ease of construction and the like, but the use of a hard panel-shaped material is not prohibited.

FIG. 2 is a sectional view showing a construction example of this heat insulation method. In order to enhance the heat insulation of the entire building, not only the wall surface 11 but also the roof 21 and floors 22 and 23 as shown in FIG.
It is desirable to carry out the same construction. Insulation 12,1
The thickness of 3 is, for example, 50 mm, and this is 2
It is possible to stack sheets (50 mm + 50 mm). The thickness of the sheet material 14 is, for example, 0.1 mm to 0.5 mm.
Something can be used. The thickness dimensions of the heat insulating material and the sheet material are not limited to these, of course. For example, a plurality of thinner heat insulating materials may be laminated with the sheet material interposed, and a heat insulating material having a larger thickness dimension may be used. Materials may be used. Also, for example, 40 mm and 60 m
It is also possible to appropriately combine heat insulating materials having different thicknesses such as m, 20 mm and 30 mm, and stack them with the sheet material interposed.

This method is used for wooden construction, concrete construction (R
C, SRC, concrete block construction) etc.
2 and 23 may be various materials such as a concrete wall body cast on site, precast boards such as foam concrete board, gypsum board, cement board, concrete block, plywood, mortar and the like.

FIG. 3 is a diagram showing another example of construction by the heat insulation method of the present invention. As illustrated, in this example, the boundary wall 11
A heat insulating material was laminated in three layers on the outside of (21, 22, 23). A resin sheet material 14 is interposed between each heat insulating material. In this way, by forming the heat insulating material in three layers or more (four layers, five layers, ...), the heat insulating property can be further enhanced. Also, the sheet material 14 arranged between the heat insulating materials
As a result, the ability to block water vapor (humidity) is improved, and dew condensation within the wall can be more completely prevented.

Further, it has been found that this structure is also excellent in sound insulation. That is, according to an experiment by the present inventor comparing the case where the heat insulating materials are simply laminated and the case where the resin sheet material is interposed between these laminated heat insulating materials, the latter is
That is, the structure according to the present invention, in which the resin sheet material is arranged, has a significantly better sound insulation effect. Moreover, since the resin sheet material may be very thin, the thickness of the heat insulating layer is hardly increased. Therefore, for example, by applying the present construction method to a house near an airfield or an expressway, noise of an airplane or an automobile can be effectively blocked and soundproofing can be achieved.
In this case, it is desirable to perform the main construction not only on the wall but also on the roof as shown in FIG. Further, it is preferable that the window portion is a double window from the viewpoint of heat insulation efficiency.

Further, in the example shown in FIG. 2, since the main construction is also performed on the outer side (lower side) of the second floor material 22, it is possible to prevent the sound of the second floor (for example, footsteps) from echoing to the lower floor.
In addition, in the example of the figure, the heat insulating material is arranged on the outdoor side for all the boundary walls. The sheet material 14 may be arranged.

[0021]

As described above, according to the outer insulation method of the present invention, it is possible to obtain a structure which is excellent in durability and can prevent dew condensation more completely. Also, a good soundproofing effect can be obtained. Further, since it is sufficient to sandwich the sheet material between the heat insulating materials, the construction is easy and the cost does not increase.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a heat insulating structure by an outer heat insulating method of the present invention.

FIG. 2 is a sectional view showing an example of a heat insulating structure according to the outer heat insulating method of the present invention.

FIG. 3 is a cross-sectional view showing another example of the heat insulating structure by the outer heat insulating method of the present invention.

FIG. 4 is a cross-sectional view showing an example of a wall surface structure by a conventional outside heat insulation method.

FIG. 5 is a sectional view showing an example of a wall structure according to a conventional outer insulation method.

[Explanation of symbols]

 11,12,22,23 boundary wall 12,13,15 heat insulating material 14 resin sheet material 16 exterior finishing material

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location E04B 5/43 E04B 5/43 G E04D 3/35 E04D 3/35 F

Claims (1)

[Claims] 1. An outer insulation method for providing an insulating material on the outdoor side of a boundary wall, wherein a plurality of the insulating materials are laminated, and
An outer heat insulation method characterized in that a resin sheet material is interposed between the heat insulation materials.