JPH0425464Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a roof base material used as a waterproof base for a roof.

[Background technology] When constructing a roof, roof underlayment material A is laid on top of the roofing board and fixed with nails 7 or tassels, and then roof tiles are placed on top of this, and the waterproofing of the roof is ensured by the roofing underlayment material. I'm trying to make it happen.
Conventionally, as such a roof base material A, those shown in FIGS. 2a and 2b have been generally used. The one in Fig. 2a is formed by pasting terfelt 4, which is formed by impregnating paper with coal tar, on the back side of a resin sheet 2 made of a soft thermoplastic resin such as polyvinyl chloride. The one shown in FIG. 2b is formed by laminating and adhering a rubber asphalt felt 5 and an asphalt felt 6 on the back surface of a resin sheet 2.

The problem with these products is that the resin sheet 2 is easy to slip on, and when performing tiling work on the roof base material A after laying the roof base material A on the roofing boards, the resin sheet 2 is prone to slipping. If your foot slips on the surface of the sheet 2, working at a high place such as a roof becomes extremely dangerous. Moreover, in these cases, the heat from the roof tiles is directly transmitted to the resin sheet 2, which causes the resin sheet 2, which has a large thermal expansion, to expand and contract, causing large expansion and contraction in the roof base material A, and this expansion and contraction causes the roof base material to expand and contract. There is also the problem that the nail hole of the nail 7 nailed into the roof base material A widens greatly, and there is a risk that rainwater may infiltrate into the roofing board from this area. Although the nail 7 is exposed on the surface of the nail 7, there is also the problem that rainwater may enter through the gap between the nail 7 and the nail hole.

[Purpose of the invention] The present invention was created in view of the above points, and it eliminates the risk of slipping during tile roofing work, reduces expansion and contraction due to temperature changes, and eliminates the risk of slipping during tile roofing work. The object of the present invention is to provide a roof base material that can prevent rainwater from penetrating through the roof.

[Disclosure of the invention] The roof base material according to the invention is made by pasting turfelt crepe 1, which is formed by providing wrinkles 3 on the surface of turfelt made of paper impregnated with coal tar, on the surface side of a resin sheet 2. The above object is achieved by providing the turf felt crepe 1 on the surface of the resin sheet 2.The present invention will be described in detail below with reference to examples. do.

The resin sheet 2 is made of a soft thermoplastic resin such as polyvinyl chloride, and in the embodiment shown in FIG. It is attached by fusion etc. Turfelt 4 is formed by impregnating paper with coal tar at a ratio of about 70 to 75%. Although the coal tar prevents water from passing through, water is absorbed into the fine gaps between the paper fibers. By doing so, it has the ability to absorb moisture and also has breathability. usually
It has the ability to absorb ^about 500g/m2 of moisture.
Further, terfelt crepe 1 is attached to the entire surface of the resin sheet 2 by adhesive or fusion. Turfelt crepe 1
is made by crimping the above-mentioned terfelt 4, which is formed by impregnating paper with coal tar at a ratio of about 70 to 75%, like crepe, to provide a large number of wrinkles 3 on the surface.

The roof base material A formed in the three-layer structure of the resin sheet 2, the turf felt 4, and the turf felt crepe 1 in this way is laid on the shedding board of the roof and further fixed by nails 7 or tassels. This type of roof tiles are used by roof tiles on top of the roof base material A that has been laid on the roofing board in this way. In the roof base material A formed as described above, the infiltration of rainwater into the roof board is triple-prevented by these three layers, and the moisture absorption by the turf felt 4 provided on the back side of the resin sheet 2 This prevents dew condensation from forming on the surface of the sheathing board, thereby preventing corrosion from occurring on the shedding board. In addition, since the turfelt crepe 1 to be pasted on the surface of the resin sheet 2 is formed with wrinkles 3 on the surface, the roof underlayment material A is laid on the roofing board and then the roof underlayment material A is placed on the roof underlayment material A. When performing tile roofing work, it is possible to prevent the danger of slipping due to the wrinkles 3 of this turf felt crepe 1. This turfelt crepe 1 has higher hygroscopicity than the terfelt 4 due to the crimping process, and the turfelted crepe 1 can absorb rainwater leaking from the roof tiles. Furthermore, the turfelt crepe 1 on the surface of the resin sheet 2 is made of paper and has heat insulating properties, and can prevent heat from the roof tiles from being directly transmitted to the resin sheet 2. Low turf felt crepe 1
It is possible to prevent large thermal expansion and contraction from occurring in the resin sheet 2, which has a larger coefficient of thermal expansion than that of , and to prevent large expansion and contraction from occurring in the roof base material A, which uses the resin sheet 2 as a base material. Therefore, as the roof base material A expands and contracts, holes for nails such as the nails 7 driven into the roof base material widen, and rainwater can be prevented from entering the roofing board from this area. Moreover, the turf felt crepe 1 provided as the surface layer of the roof base material A contains coal tar, which prevents coal tar from adhering tightly around the nails 7 and creating gaps between the nails 7 and the nail holes. It is also possible to prevent rainwater from entering through the nail holes. Furthermore, due to the wrinkles 3 in the terfelt crepe 1,
It is possible to enhance the design by giving the roof base material A a sense of volume. In addition, when roofing with Japanese tiles, soil is piled up on top of the roof base material A, and the turf felt crepe 1, which forms the surface layer of the roof base material A, blends well with the soil.
This means that roofing construction using Japanese tiles can be easily carried out.

FIG. 1b shows another embodiment of the present invention, in which a terfelt crepe 1 is used in place of the turfelt 4 on the back side of the resin sheet 2 in the embodiment of FIG. 1a. ,
This turfelt crepe 1 is turfelt 4
Since the hygroscopicity is higher than that of the flooring board, the moisture absorption effect on the surface of the roofing board is high, and the occurrence of dew condensation on the roofing board can be effectively prevented.

[Effects of the invention] As mentioned above, in the present invention, turfelt crepe, which is formed by providing wrinkles on the surface of turfelt made by impregnating paper with coal tar, is attached to the surface side of the resin sheet. So,
This prevents the risk of slipping due to the creases of the turf felt crepe when performing tiling work on the roof base material, and the turf felt crepe on the surface of the resin sheet is made of paper and has good heat insulating properties. This feature prevents the heat from the roof tiles from being directly transmitted to the resin sheet, and prevents large thermal expansion and contraction of the resin sheet, which has a high coefficient of thermal expansion. It is possible to prevent large expansion and contraction from occurring and to prevent rainwater from penetrating into the roofing board from the expansion and contraction of the roofing material, which could cause holes for nails driven into the roofing material to widen. It is possible. Moreover, the turf felt crepe provided as the surface layer of the roof base material contains coal tar, which prevents the coal tar from sticking around the nails and creating gaps between the nails and the nail holes, thereby preventing rainwater from forming. This prevents water from entering through the nail holes.

[Brief explanation of drawings]

FIGS. 1A and 1B are sectional views of an embodiment of the present invention, and FIGS. 2A and 2B are sectional views of a conventional example. 1 is a terfelt crepe, and 2 is a resin sheet.

Claims (1)

[Scope of utility model registration request] A roofing base material made by pasting turfelt crepe, which is formed by creating wrinkles on the surface of turfelt paper impregnated with coal tar, on the surface side of a resin sheet.