JPS6229583B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproof base sheet that is laid under roofing materials such as tiles and metal roofing sheets such as galvanized iron sheets.

Conventionally, this type of waterproof base sheet for roofs uses a flat waterproof base sheet, so this is laid on a sloped roof substrate, and multiple horizontal beams are placed on the top surface at predetermined intervals, intersecting with the direction of the slope. The roof waterproof foundation is constructed by inserting the sheets into the roof substrate and fixing them with nails, and then roofing materials such as tiles are covered on the top surface of the sills.In this case, each sill is When the tiles are in close contact with the flat base sheet surface, during strong winds and rain, water that seeps in between the tiles, etc., accumulates between adjacent horizontal beams, causing corrosion of the beams, corrosion of the nails, and nail holes. This has the disadvantage of causing rainwater to enter. Another disadvantage is that the nail holes penetrating the waterproof base sheet tend to expand due to the vibrations of the building, allowing rainwater to enter and corrode the roof board. Especially in recent years,
Various roofing materials have been developed such as cement tiles, asbestos cement boards (Color Best, Colonial), asphalt shingles, and metal tiles.Roof structures with a gentle slope are often used, and therefore depend on the waterproofness and durability of the roof base sheet. There is a strong need in the industry to improve the above-mentioned drawbacks.

The present invention was developed in view of the shortcomings of the conventional roofing waterproof base sheet and the above-mentioned demands. Even when horizontal beams are arranged and fixed on the surface, water that has entered through the roofing material can be prevented from leaking between the horizontal beams. It provides good drainage without being retained in the water, and also prevents as much as possible the formation of gaps around the outer periphery of the inserted nail and the expansion of the nail hole due to vibration, etc., improves waterproofness, and prevents corrosion of the nail. Furthermore, the present invention provides a waterproof base sheet for a roof which aims to improve the anti-slip properties of feet and provide stable fixed installation to horizontal beams. Used for roof waterproof base construction in which multiple horizontal beams are placed at predetermined intervals on the surface of a roof waterproof base sheet laid on the top surface, and the sheets are inserted into the roof substrate and fixed by nailing. In the roof waterproof base sheet, a long corrugated felt impregnated with asphalt is pasted on the top surface of a flat long base sheet, so that the surface has a corrugated surface having a large number of grooves formed by the long corrugated felt. The present invention is characterized in that it is formed into a laminated sheet having a large number of spaces between the large number of upwardly protruding stripes of the long corrugated felt and the flat surface of the flat long base sheet.

The second invention provides a roof waterproof base sheet for achieving the above object even better, and fills asphalt into the plurality of spaces of the laminated sheet according to the first invention. It is characterized by being constructed in a laminated sheet. First, an embodiment of the first invention will be described with reference to FIGS. 1 and 2. Reference numeral 1 indicates a flat long base material sheet, and on the upper surface of the sheet 1, a long corrugated felt 2 impregnated with asphalt is overlapped with its many downward protrusions 2a, and is pasted with a molten asphalt adhesive 3. The surface is formed into a wavy surface having a large number of grooved surfaces 6 formed by the elongated corrugated felt 2, and a large number of upward protrusions 2b of the elongated corrugated felt and the flat elongated base sheet 1. The roof waterproof base sheet A of the present invention is composed of a laminated sheet having a large number of spaces 5 between it and a flat surface. As the long base sheet 1,
Asphalt felt, asphalt roofing, synthetic resin sheets, foamed synthetic resin sheets, rubber sheets, etc. are used. The asphalt-impregnated long corrugated felt 2 may be, for example, waste paper, rag cloth,
A felt base paper made from beaten and pulverized fibers such as pulp is impregnated with molten asphalt by dipping, and then processed into a corrugated shape. In this way, the asphalt-impregnated long corrugated felt 2 contains asphalt in a weight ratio of about 120 to 160% relative to a very large amount of ordinary felt. The roof waterproof base sheet A having the above structure is used for waterproofing the base as shown in FIGS. 5 and 6. That is, as shown in the figure, a plurality of sheets of the present invention A are laid one on top of the other on the top surface of the slanted roof substrate 9, and a plurality of horizontal beams 10 are placed on the corrugated surface at appropriate intervals. and arranged,
The sheet A is inserted and nailed into the roof board using nails 12 to fix the crosspiece 10 at a predetermined position. After constructing the waterproof base, tiles are placed on these horizontal beams 10 and nails 12 are fixed to complete the roofing. In this waterproof base construction, since the roof waterproof base sheet A of the present invention is composed of a long base sheet 1 whose lower layer is flat, it can be stably laid on the roof substrate 9, and the upper layer Since it is composed of a long corrugated felt 2 impregnated with asphalt, there is a gap between the horizontal crosspieces 10 fixed to its surface due to its waveform, that is, due to its many grooved surfaces 6. A large number of void passages 11 are automatically created between
is formed. In this way, rainwater that has entered between the tiles easily flows down the gap passage 11, resulting in good water drainage. Further, according to the present invention, since the upper layer is made of asphalt-impregnated elongated corrugated felt 2, it has the following advantages which are lacking in conventional roof waterproof base sheets made of synthetic resin.

(b) It is possible to contain a large amount of asphalt, which is based on felt and has waterproof properties, anticorrosion properties, adhesive properties, high temperature softening sealing properties, etc., and it becomes a waterproof material that has toughness, flexibility and elasticity, and has the following effects. bring about.

(b) When nailing, the outer periphery of the nail is covered with adhesive to seal the nail hole without creating any gaps on the outer periphery, and at the same time, prevent corrosion of the nail.

(C) After that, even if the nail moves due to vibration etc. and a gap is created on its outer periphery, the asphalt impregnated into the felt softens and flows due to high temperatures such as in summer and seals the gap, improving the nail hole sealing property and preventing the nail from forming. Reintroduces corrosivity.

(d) The asphalt-impregnated felt has a moderate adhesiveness and flexibility on the surface, which, together with its wavy shape, provides a non-slip effect for feet, making it possible to stabilize the work of installing and fixing the one-way horizontal crosspiece 10 at a predetermined fixed location. can be done.

(E) The above (a) and (b) maintain the sealing properties and anticorrosion properties of the nail holes, which provides durability for fixing nails on the horizontal crosspieces, and also improves the durability of roofs installed on the horizontal crosspieces. It has the effect of stabilizing the material, preventing water leakage accidents, and increasing the durability of the entire roof structure.

FIGS. 3 and 4 show an example of the implementation of the second invention, in which the roof waterproof base sheet A constructed according to the first invention does not further deteriorate its waterproof property even if it is penetrated by a nail. It is designed to reliably prevent this, and utilizes the large number of spaces 5 created between the asphalt-impregnated long corrugated felt constituting the sheet A and the flat long base sheet. Roof waterproof base sheet A is made of a laminated sheet filled with Asphalt 7.
As shown in the figure, even if the nail 12 is penetrated, its outer periphery is covered with the filling asphalt 7, so that the corrosion prevention effect of the nail is further improved. It provides a waterproof base sheet that does not create gaps that may occur in nail holes, and has a more reliable sealing performance for nail holes, and also has the effect of further increasing the waterproofness, cushioning performance, toughness, etc. of the sheet as a whole. bring. FIG. 8 shows a modification of the waterproof base sheet A of the present invention for convenient storage and use, in which a room-temperature adhesive layer 13 is applied and formed on the lower surface of the base sheet 1 of the base sheet A, and the adhesive layer 13 is peeled off on the outer surface. A material sheet 14 is attached. The adhesive layer 13
is a room-temperature adhesive that is mainly composed of asphalt, mixed with synthetic resin, rubber, softener, etc. In this way, this waterproof base sheet A can be stacked and stored in roll form, and when used, if the release material sheet 14 is peeled off and the adhesive layer 13 side is pressed onto the roof substrate 9 side, the waterproof base sheet A will automatically move to that position. Can be installed fixedly. In FIGS. 1 and 2, reference numeral 4 indicates a light-colored painted surface applied to the entire upper surface of the asphalt-impregnated corrugated felt 2.
It is now possible to draw ink lines on the surface for positioning the crosspieces. Also, in Figure 3, 8 is
A guide line made of light-colored paint for positioning the crosspieces is shown at a predetermined position on the upper surface of the felt 2.

As described above, according to the first invention, the roof waterproof base sheet is constructed as a laminated sheet consisting of a flat elongated base sheet and an asphalt-impregnated elongated corrugated felt laminated and adhered to the upper surface of the flat elongated base sheet. The flat long base material sheet surface allows it to be laid stably and well on the roof substrate, and the asphalt-impregnated long corrugated felt on the top layer allows the horizontal beams to be stably and firmly fixed on the top surface, and there are many grooves in between. Since the void passage for water drainage is secured by the surface, various inconveniences caused by water accumulation as mentioned above can be solved, and the asphalt-impregnated long corrugated felt makes it possible to eliminate the conventional synthetic resin roof waterproof base sheet. Completely lacking in (a) to (e) listed above
It brings about various effects. Also, according to the second invention, the first invention
In the structure of the invention, asphalt is filled into a large number of spaces formed between a flat elongated base sheet and a large number of upwardly protruding stripes of asphalt-impregnated elongated corrugated felt, so that when nailing The outer periphery of the asphalt is more closely encapsulated with filling asphalt to prevent corrosion of the nails and further improve the sealing properties around the nail holes, thereby providing a roof waterproof base sheet with further improved reliability. bring about.

[Brief explanation of the drawing]

Figure 1 shows one of the roof waterproof base sheets of the first invention.
FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, FIG. 3 is a partial perspective view of an example of the embodiment of the second invention, and FIG. FIG. 5 is a sectional view taken along the line B, FIG. 5 is a slope view of the waterproof base sheet of the first invention in use, FIG.
The figure shows a cross-sectional view of a portion of the waterproof base sheet of the second invention in use, and FIG. 8 shows a cross-sectional view of a portion of a modified example. DESCRIPTION OF SYMBOLS 1... Flat long base material sheet, 2... Long corrugated felt impregnated with asphalt, 2a... Downward protrusion, 2b... Upward protrusion, 3... Adhesive, 5...
Space, 6... Concave surface, 7... Filled asphalt,
9...Roof board, 10...Horizontal timber, 12...Nail.

Claims (1)

[Claims] 1. A plurality of horizontal beams are arranged at predetermined intervals on the surface of a roof waterproof base sheet laid on the upper surface of an inclined roof substrate, and the sheets are inserted through the roof substrate and nailed. In the roof waterproof base sheet used for fixed-type roof waterproof base construction, a long corrugated felt impregnated with asphalt is pasted on the top surface of a flat long base sheet, so that the surface has the long wave shape. A laminated layer formed of a wavy surface having a large number of concave lines of felt, and having a large number of spaces between the large number of upwardly protruding ridges of the long corrugated felt and the flat surface of the flat long base sheet. A roof waterproof base sheet characterized by being configured into a sheet. 2. A type of roof waterproofing in which multiple horizontal beams are placed at predetermined intervals on the surface of a roof waterproof base sheet laid on the top surface of a sloping roof substrate, and the sheets are inserted through the roof substrate and fixed by nailing. In the roof waterproof base sheet used for base construction, a long corrugated felt impregnated with asphalt is pasted on the top surface of a flat long base sheet, so that the surface has many grooves formed by the long corrugated felt. A laminated sheet formed on a corrugated surface with a plane and filled with asphalt in a large number of spaces between a large number of upward protrusions of the long corrugated felt and a flat surface of the flat long base sheet. A roof waterproof base sheet characterized by comprising: