JPH045631Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an insulating base material for waterproofing construction used when insulating and waterproofing flat roofs such as flat roofs, the roofs of reinforced concrete buildings, etc.

(Prior Art) Asphalt waterproofing method and sheet waterproofing method have been widely known as construction methods for waterproofing flat roofs such as the rooftops of reinforced concrete buildings and flat roofs of wooden buildings. Recently, construction methods that combine heat insulating materials have been mainly used for the purpose of retaining heat inside buildings and for preventing cracks in concrete slabs caused by changes in outside temperature. Waterproofing and insulating the roof of a building are
Compared to insulating the inside of a building, this method is advantageous in that there is less danger from the spread of fire in the insulation material.

Asphalt waterproofing has been the mainstream method of waterproofing buildings for a long time, but the construction work is cumbersome, it emits odors during construction, and when used in combination with insulation materials, it causes the following problems: There are drawbacks. In other words, during construction, high-temperature molten asphalt (240 to 270
Since the heat insulating material is bonded to the heat insulating material at a temperature of 100°F (°C), the heat insulating material is deformed and deteriorated due to thermal expansion, making the adhesion unstable and making it impossible to obtain long-term durability. Especially in the winter, the molten asphalt cools down rapidly, resulting in insufficient adhesion of the insulation material, and even after construction, the asphalt hardens in the winter.
When cracks occur in a concrete slab, the insulation material integrated with the asphalt is directly affected, causing the insulation material to lift up and peel. However, when this method is used, the unevenness of the slab surface is leveled out, and the installation height of the insulation materials installed in parallel on the top surface is adjusted. ) can be prevented from occurring.

On the other hand, when applying sheet waterproofing, the insulation is first adhered to the surface of the base of the building using a solvent-based adhesive, and then a waterproof sheet is adhered over two or more insulation materials. Although the workability of construction is easier than that of asphalt waterproofing, it is directly affected by unevenness of the roof base and uneven thickness of the insulation materials, resulting in unevenness between the insulation materials installed side by side. There is a problem with the formation of land.
In order to solve this problem, in the past, elastic and flexible insulation materials were used, and the unevenness between them was adjusted through compression deformation. However, when using a thin insulation material, the adhesion to the base material and the waterproof sheet to the heat insulating material are not sufficiently bonded by pressure, and the adhesion becomes unstable. The reality was that the lack of insulation was compensated for by installing insulation on the indoor side.

For this reason, an insulating base material for waterproof construction as shown in Japanese Utility Model Application Publication No. 57-131925 was developed and used, but this material does not create unevenness on the construction surface and has sufficient adhesion. It has high strength, excellent heat insulation properties, and durability, and can overcome the drawbacks of the conventional construction methods, making it a practically effective method.

(Problem to be solved by the invention) However, according to the heat insulating base material for waterproof construction disclosed in Japanese Utility Model Application Publication No. 57-131925, when adhering the waterproof sheet onto the base material, the adhesion surface of the base material It is difficult to completely bond the entire surface due to the presence of foreign objects and variations in crimping.
Small unbonded areas tended to occur.

If such an unbonded part exists, it may be heated by direct sunlight, causing the air remaining in the unbonded part to expand and cause the waterproof sheet to swell. In addition, in the adhesive layer of the concrete slab on the bottom, indoor moisture pressure is high during winter, and moisture infiltrates through the concrete slab to the bonding surface between the base material and the slab, expands as the outside temperature rises, and causes damage to the base material. It may also cause the bulge to bulge. This idea solves these problems.

(Means for solving the problem) In other words, this invention is a base material used for waterproofing construction on the rooftops and roofs of buildings, with a core layer made of a hard synthetic resin foam board that has heat insulating properties and strength, and a waterproof layer on the surface side. A breathable sheet is integrated with a waterproof sheet on the back side, and a synthetic resin foam sheet with elasticity and flexibility is used as a buffer layer for absorbing unevenness with a waterproof sheet on the back side. This is an insulating base material for waterproof construction, which is characterized by being integrally equipped with a waterproof sheet.

(Example) An example of this invention will be described below with reference to the drawings. The figure shows waterproof sheets 3 and 4 pasted using adhesive on both the front and back sides of a hard synthetic resin foam board 1, a breathable sheet 2 pasted on the outer surface of the waterproof sheet 3 on the front side, and a waterproof sheet on the back side. An example is shown in which a synthetic resin foam sheet 5 having elasticity and flexibility and a breathable sheet 6 are pasted on the outer surface of the sheet 4 and are laminated into six layers. Of course, it is not limited to products manufactured in this way, but a hard foamable synthetic resin material is applied on the waterproof sheet 3 of a sheet in which the waterproof sheet 3 and the breathable sheet 2 are laminated in advance,
After foaming, the waterproof sheet 4 is laminated with a waterproof sheet 4, a synthetic resin foam sheet 5, and a breathable sheet 6 on the surface thereof, and a hard synthetic resin board 1 is formed by foaming and curing the synthetic resin material, and the synthetic resin is then foamed. It can also be obtained by laminating and integrating the materials using their self-adhesive strength. Any method or order of laminating and integrating these six layers may be used.

The hard synthetic resin foam board 1 is a heat insulating material made of a strong hard plate-like material, and suitable materials include hard polyurethane foam, polystyrene foam, phenol foam, isocyanurate foam, urethane-modified isocyanurate foam, and epoxy foam. be. The thickness of the plate is not particularly limited, as it can be set according to the required heat insulation performance.

The synthetic resin foam sheet 5 having elasticity is a synthetic resin foam having flexibility and flexibility,
Sheet materials made of flexible polyurethane foam, semi-rigid polyurethane foam, polyethylene foam, flexible polyvinyl chloride foam, etc. are suitable. The thickness of these sheet-like materials is usually 1 m/m to 10 m/m, as it is sufficient to absorb small irregularities on the roof and unevenness between the insulation boards.

The breathable sheets 2 and 6 are made of polyester nonwoven fabric,
Glass non-woven fabrics or other breathable materials with excellent water resistance, heat resistance, and humidity and heat stability can be used.

As the waterproof sheets 3 and 4, kraft paper, aluminum foil, asphalt roofing paper, plastic film, or a suitable combination of these materials may be used.

When performing sheet waterproofing construction using the base material of this invention, on the base surface of the roof or rooftop of the building,
The synthetic resin foam sheet 5 side having elasticity and flexibility is attached using a solvent type adhesive, and two or more base materials are installed on the entire surface of the base material, and then the base material is straddled over each base material. A waterproof sheet (not shown) is pasted over the entire surface. In this case, the synthetic resin sheet 5 having elasticity and flexibility acts as a buffer layer, the rigid synthetic resin foam plate 1 having central strength acts as a core layer, and the buffer layer is supported by the core layer together with the breathable sheet 6. Pressure-welded in the state,
When the substrate has irregularities, it adapts to the shape and is firmly bonded. Further, the buffer layer is compressively deformed within its thickness range according to the degree of pressurization, and unevenness between adjacent base materials can be eliminated.

(Effects of the invention) As described above, in the base material of this invention, the breathable sheets 2 and 6 with a slight thickness are interposed at the joint surface with the roof base surface and the joint surface with the upper waterproof sheet. Therefore, when pasting the upper waterproof sheet, air is vented through the breathable sheet 2, and it is supported by the hard synthetic resin foam board 1, and can be effectively crimped by the elasticity of the underlying buffer layer. Therefore, the waterproof sheet can be easily and successfully adhered. In addition, even if an unbonded part occurs between the waterproof sheet and the breathable sheet 2 and is heated and air stagnant in the unbonded part expands, it will migrate to the edge of the base material through the breathable sheet and close the edge joint. Since the water escapes from the outside to the outside, it can prevent the waterproof sheet from blistering due to air. Similarly, even if an unbonded part occurs on the joint surface with the base surface of the roof, moisture from the base will escape to the outside from the joint at the end of the base material through the breathable sheet 6 even if heated and expanded. It can prevent blistering of the base material.

In addition, the base material of this invention has waterproof sheets 3 on both the front and back sides of the hard synthetic resin foam board 1 that serves as the core layer.
4, it is possible to block moisture rising from an adhesive base such as a concrete slab and prevent moisture absorption into the hard synthetic resin foam board 1, and therefore, its heat insulation performance is not deteriorated.

Furthermore, the waterproof sheets 3, 4 and nonwoven fabrics 2, 6 provided on both sides of the hard synthetic resin foam board 1 function as dimensional stabilizers or reinforcing materials, and can withstand large temperature differences between the front and back of the base material caused by sunlight. This has the effect of effectively preventing warping and dimensional changes. In this way, the base material of this invention uses the asphalt construction method.
This eliminates the drawbacks of the sheet construction method and improves adhesion.

[Brief explanation of the drawing]

The figure is a sectional view showing one embodiment of the base material of this invention. 1... Hard synthetic resin foam board, 2, 6... Breathable sheet, 3, 4... Waterproof sheet, 5... Synthetic resin foam sheet having elasticity and flexibility (buffer layer).

Claims (1)

[Scope of utility model registration request] In the base material used for waterproofing construction on the rooftops and roofs of buildings, the core layer is a hard synthetic resin foam board with heat insulation and strength, and a breathable sheet is integrally provided on the front side with a waterproof sheet interposed on the back side. A thermal insulation for waterproof construction, characterized in that a synthetic resin sheet having elasticity and flexibility is used as a buffer layer for absorbing unevenness via a waterproof sheet, and a breathable sheet is further integrated with the buffer layer. Base material.