JPH045637Y2 - - 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 undergoes deformation and deterioration due to thermal expansion, making the bond 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 irregularities on the slab surface are smoothed out, and the installation heights of the insulating materials installed in parallel on the top surface are 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, if a thin insulation material is used, it is necessary to sacrifice insulation performance and use a thin insulation material because the adhesion to the substrate and the waterproof sheet to the insulation material cannot be sufficiently bonded by pressure, making the adhesive unstable. The reality was that the shortage 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, indoor moisture pressure is high in the adhesive layer of the concrete slab on the bottom surface during winter, and moisture infiltrates the adhesive surface between the base material and the slab through the concrete slab, expands as the outside temperature rises, and damages the base material. It may also cause the bulge to bulge.

This idea solves these problems.

(Means to solve the problem) In other words, this idea uses a hard synthetic resin foam board that has heat insulation and strength as a core layer in the base material used for waterproofing construction on the rooftops of buildings, etc.
A synthetic resin sheet with elasticity and flexibility and a breathable sheet are integrally provided on both the front and back sides via waterproof sheets as a buffer layer for absorbing unevenness, and the buffer layer on the back side is connected to the edge of the base material. This is a heat insulating base material for waterproof construction, which is characterized by having a recess formed therein.

(Example) An example of this invention will be described below with reference to the drawings. In Figure 1, waterproof sheets 3 and 4 are attached to both the front and back surfaces of a hard synthetic resin foam board 1 using adhesive, and synthetic resin foam sheets 5 and 6 having elasticity and flexibility are further attached to the outer surfaces of the sheets, respectively. death,
Furthermore, an example is shown in which air permeable sheets 2 and 7 are adhered to the outer surface and laminated and integrated, and the synthetic resin foam sheet 5 on the back side is pressed and shaped from the air permeable sheet 7 side to form a recess 8. Of course, the invention is not limited to this, and after applying a hard foamable synthetic resin material on a synthetic resin foam sheet 6 having elasticity and flexibility, which has been laminated with a waterproof sheet 3 and a breathable sheet 2 in advance, and foaming it, A synthetic resin foam sheet 5 in which a waterproof sheet 4 and a breathable sheet 7 are laminated in the same manner as described above and recesses 8 are formed is applied to the surface of the synthetic resin sheet 5, and a hard synthetic resin board 1 is formed by foaming and curing the synthetic resin material. It can also be obtained by integrally forming these seven layers using self-adhesive force.

In the example shown in FIG. 3, the recess 8 has a vertical and horizontal groove shape that communicates with the end portion of the buffer layer 9, but the shape of the recess 8 is not particularly limited to the shape of this example, and may have any shape. It is not limited to the shape of the recessed portion.

Further, in the example shown in FIG. 1, the entire surface of the synthetic resin foam sheet 5 from the concave portion to the convex portion is covered with the breathable sheet 7, but as shown in FIG. 2, only the convex surface of the synthetic resin foam sheet 5 is covered. The same effect can be obtained by covering the air-permeable sheet 7 with a breathable sheet 7.

The hard synthetic resin foam plate 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.

Elastic synthetic resin foam sheets 5, 6
is a synthetic resin foam having softness and flexibility, and suitable sheet materials include soft polyurethane foam, semi-rigid polyurethane foam, polyethylene foam, and soft polyvinyl chloride foam. 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 heat insulating plates.

The waterproof sheets 3 and 4 may be made of kraft paper, aluminum foil, asphalt roofing paper, plastic film, or a laminated combination of these materials.

The breathable sheets 2 and 7 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.

When performing sheet waterproofing construction using the base material of this invention, on the base surface of the roof or rooftop of the building,
Paste one side using solvent-type adhesive,
After installing two or more base materials over the entire surface of the base, a waterproof sheet (not shown) is attached over the entire surface of each base material. In this case, the front and back synthetic resin sheets 5 and 6 having elasticity and flexibility act as a buffer layer, the rigid synthetic resin plate 1 having strength in the center acts as a core layer, and the lower buffer layer is supported by the core layer. When the substrate has irregularities, it adapts to the shape and is firmly bonded.
In addition, both buffer layers compress and deform according to the degree of pressurization within their thickness range, eliminating unevenness between adjacent base materials, and being supported by the core layer and forming the top buffer layer. Strong adhesion to the waterproof sheet.

(Effect of the invention) As described above, in the base material of this invention, the breathable sheets 2 and 7 with a slight thickness are interposed on the joint surface with the roof base surface and the joint surface with the upper waterproof sheet. Therefore, when attaching 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 is effectively crimped by the elasticity of the buffer layer below. Therefore, the waterproof sheet can be easily and successfully adhered. Also, waterproof sheet and breathable sheet 2
Even if an unbonded part occurs during the process and the air that stays in the unbonded part expands due to heating, it will migrate to the edge of the base material through the breathable sheet and escape to the outside from the edge joint. This prevents the tarpaulin sheet from blistering due to air. Similarly, even if an unbonded part occurs on the joint surface with the base surface of the roof and the moisture from the base heats and expands, it escapes to the outside from the joint at the end of the base material through the breathable sheet 7 and the recess 8. This will prevent the base material from blistering.

In addition, when the room directly below the base surface of the rooftop becomes hot and humid during winter heating, moisture permeates through the base material adhesive layer and heat insulation layer.
Condensation occurs. During a long period of time in winter, a considerable amount of condensed water accumulates, which tends to reduce insulation performance and cause peeling due to ice formation, but this phenomenon does not occur because moisture is discharged to the outside through the recess 7.

In addition, when the base material of this invention is placed on a base on a rooftop, many recesses are formed in the buffer layer in contact with the base, so even if there are quite large protrusions on the surface of the base, these When the convex part is located inside the concave part, the convex part can be absorbed because it is accommodated within the concave part, and when it is located outside the concave part, the existence of the concave part around it absorbs the convex part. Compressive deformability increases, and the convex portion can be absorbed by the deformation. In this way, even fairly large protrusions on the base can be effectively absorbed, and the horizontal construction of the base material becomes easier.

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

Furthermore, the waterproof sheets 3, 4 and the breathable sheets 2, 7 provided on both sides of the hard synthetic resin foam board 1 function as dimensional stabilizers or reinforcing materials, and prevent large temperature differences between the front and back surfaces of the base material caused by sunlight. However, it has the effect of effectively preventing warping and dimensional changes. In this way, the base material of this invention overcomes the drawbacks of the asphalt construction method and the sheet construction method, and has improved adhesion.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the base material of this invention, Fig. 2 is a sectional view of the buffer layer portion of another example, and Fig. 3 is a sectional view showing an embodiment of the base material of this invention.
The figure is an explanatory diagram of the base material viewed from the side of the buffer layer in which the recessed portions are formed. 1... Hard synthetic resin foam board, 2, 7... Breathable sheet, 3, 4... Waterproof sheet, 5, 6...
...Synthetic resin foam sheet with elasticity and flexibility.

Claims (1)

[Scope of utility model registration request] In base materials used for waterproofing construction on the rooftops and roofs of buildings, the core layer is a hard synthetic resin foam board that has heat insulation and strength, and a synthetic resin that has elasticity and flexibility with waterproof sheets on both sides of the core layer. A heat insulating base material for waterproof construction, characterized in that a resin sheet and a breathable sheet are integrally provided as a buffer layer for absorbing unevenness, and a recessed portion communicating with the end of the base material is formed in the buffer layer on the back side.