JP2678524B2 - Sheet waterproofing method of fixing with nails or staples - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a waterproofing method for roofs, roofs, verandas, bathrooms or basements of buildings such as concrete buildings. For details, use an asphalt-based waterproof sheet for waterproofing, and fix it with a locking member such as nails or staples at the site that requires waterproofing (referred to as "waterproof substrate"), and then join the sheets by fusion or adhesion. Regarding waterproof construction method.

[Prior art] A waterproofing method (referred to as a “sheet waterproofing method”) in which a waterproofing sheet formed by laminating a polymer-modified asphalt on a reinforcing cloth as a waterproofing layer is spread over a waterproofing base (referred to as “sheet waterproofing method”) is a method of bonding to a waterproofing base. (1) a thermal method using a hot-melted polymer-modified asphalt, (2) an adhesive method using an adhesive, (3) a torch method for melting and bonding a waterproof sheet by torch heating, and (4) a pressure-sensitive adhesive layer. An adhesive method for bonding is known.

Each of these is a contact method in which the waterproof sheet is adhered to the entire surface of the waterproof base, the work is complicated, and there are many manual parts.
It required considerable experience and skill, and the work efficiency was very poor. In addition, in such a construction method, if the waterproof substrate is leaking, sufficient adhesion will not be achieved, and gas such as steam generated from the substrate will cause swelling of the waterproof sheet, promoting deterioration of that portion and increasing the waterproof life. There is a problem that is shortened. For this reason, it is necessary to adhere the waterproofing sheet in a state where the waterproofing base is completely dried, and the waterproofing construction plan has been considerably disturbed, and the construction period has been increased and the cost has often increased.

In order to improve the shortcomings of these contacting methods, an insulating method of fixing a waterproof sheet partially without adhering to a waterproof base has recently been used. For example, a method of fixing a waterproof sheet made by laminating a sheet mainly composed of chlorinated polyethylene and chlorosulfonated polyethylene on a polyester woven or braided cloth, or a waterproof sheet made of a polyvinyl chloride resin with a nail on a waterproof base. Has been done.

This method is easy to tear from a part fixed with a nail, and a waterproof sheet used in this method needs to have a tensile strength and a tear strength enough to withstand a tearing force. Since the waterproof sheet such as chlorinated polyethylene has a large tensile strength and tear strength of the resin as the main component, it can be nailed with a single sheet or a sheet of auxiliary meshed polyester woven cloth or braided cloth. Can be fixed by.

However, a waterproof sheet formed by laminating a sheet mainly composed of chlorinated polyethylene and chlorosulfonated polyethylene on a polyester woven fabric or a braided cloth, or a waterproof sheet made of a polyvinyl chloride resin is expensive and is not so expensive. Since the thickness cannot be increased, it is easily blown off by the wind, and has disadvantages such as a high heat fusion temperature.

On the other hand, asphalt-based waterproof sheets are mainly composed of asphalt, and even if modified with a polymer, their tensile strength and tear strength are much lower than those of the above-mentioned resins, so if they cannot be supported by a reinforcing cloth, Even the shape cannot be maintained. For this reason, a sheet is usually reinforced by laminating a polyester-based or glass-based non-woven fabric or woven fabric as a reinforcing cloth, but the effect is only to maintain the shape of the waterproof sheet, and it is still not fixed with nails. Conventionally, it was thought that it could not be carried out because of insufficient strength.

The reason is that the conventional method of fixing with nails is not suitable for an asphalt sheet, and the tensile strength of the above-mentioned reinforcing cloth can be increased by increasing the basis weight, but the tear strength is made much larger. This is because non-woven fabrics have a strong tendency. As an example, the relationship between the basis weight of polyester nonwoven fabric and the tear strength is shown in the table below, and the tear strength does not increase by increasing only the basis weight.

[Problems to be Solved by the Invention] A sheet mainly composed of chlorinated polyethylene and chlorosulfonated polyethylene used in an insulating method for partially fixing a waterproof sheet to a waterproof substrate without adhering to the waterproof substrate is a polyester woven fabric or a set. The tarpaulin laminated on the cloth or the tarpaulin made of polyvinyl chloride resin is expensive and cannot be made too thick because it is expensive, so it is easily blown by the wind, and the heat fusion temperature is high. There is.

On the other hand, asphalt-based waterproof sheets are inexpensive but have insufficient strength because asphalt is the main component, and the strength is still insufficient even when a polyester or glass nonwoven fabric or woven fabric is laminated as a reinforcing cloth. And was not used.

The present invention aims to solve the above problems and provide a sheet waterproofing method by an insulating method using an asphalt-based waterproof sheet.

[Means for solving the problem] Even asphalt-based waterproof sheets require skill and work efficiency is low. Skills are not required, work efficiency is good, and swelling occurs even if the waterproof substrate leaks a little. As a result of examining the insulation method that does not occur,
Even if a waterproof sheet with asphalt laminated on a non-woven fabric is used, sufficient strength can be obtained by using a locking member such as nails or staples to lock the locking material fixed to the waterproof substrate in a specific method. Further, it was found that the asphalt is a polymer-modified asphalt, and further greater strength can be obtained by locking the above-mentioned locking member with a locking member through a holding member, thereby completing the sheet waterproofing method of the present invention. Came to.

A first invention of the present invention is to fix one end of a waterproof sheet in which asphalt is laminated on a non-woven fabric to a locking member fixed on a waterproof substrate with a locking member for fixing the waterproof sheet to the locking member. The sheet waterproofing method is characterized in that one end of another adjacent waterproof sheet is laminated so as to cover the locking member, and the laminated surfaces of the sheets are joined together.

A second invention of the present invention is the sheet waterproofing method according to claim 1, characterized in that the asphalt comprises a polymer-modified asphalt.

In a third aspect of the present invention, the non-woven fabric is made of polyester fiber and has a basis weight of 50 g / m ²
To 400 g / m ² , the sheet waterproofing method according to claim 1 or 2.

A fourth invention of the present invention is the sheet waterproofing method according to any one of claims 1 to 3, wherein the locking member is a nail or a staple.

A fifth invention of the present invention is the sheet waterproofing method according to any one of claims 1 to 4, wherein the fixing method using a locking member is a method of locking via a holding member.

A sixth invention of the present invention is a circular or rectangular shape in which the holding member is made of metal or plastic and has a diameter or a side length of 20 mm to 60 mm,
Alternatively, the sheet waterproofing method according to any one of claims 1 to 5, which is a rectangle having a short side length of 20 mm to 60 mm.

A seventh invention of the present invention is the sheet waterproofing method according to any one of claims 1 to 6, wherein the joining method is adhesion by heat fusion.

The main features of the present invention are that waterproofing can be performed by an insulating method using an inexpensive asphalt-based waterproofing sheet, whereby workability of the construction is good, and swelling does not occur. Fixing with locking members such as nails or staples improves workability of the work, and since it is insulated without being in close contact with the waterproof substrate, the gas generated from the waterproof substrate disperses throughout, and swelling may occur. There is no. The asphalt-based waterproof sheet is a waterproof sheet obtained by laminating the above-mentioned sheet containing chlorinated polyethylene and chlorosulfonated polyethylene on a polyester woven cloth or a braided cloth, or a polyvinyl chloride resin waterproof sheet. Compared to, the material is cheaper, and the thickness of the waterproof sheet can be increased. Therefore, the waterproof effect is improved, the weight is heavy and it is difficult to fly with the wind, and people can walk on it. . In addition, there are features such as a low heat fusion temperature and a small pressure bonding load, so that mutual bonding is easy. .

The asphalt used in the present invention may be petroleum-based or coal-based asphalt, but petroleum-based asphalt is preferable.
As the petroleum-based asphalt, either straight asphalt or blown asphalt can be used, but straight asphalt is preferable.

Further, asphalt used in the present invention is preferably asphalt modified with a polymer. Examples of polymer-modified asphalt include ethylene-vinyl acetate copolymer (EVA), ethylene-
Acrylate copolymer, ethylene-methyl acrylate copolymer, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-butene copolymer, ethylene-butene-diene copolymer, styrene -Butadiene copolymer, styrene-isoprene copolymer, polyvinyl chloride, polychloroprene,
Polyethylene, polypropylene, polyisobutene, butyl rubber, natural rubber, petroleum resin, rosin, rosinester,
Atactic polypropylene, low molecular weight polyethylene,
Examples thereof include those obtained by uniformly mixing and dissolving 1 part by weight to 200 parts by weight, preferably 4 parts by weight to 150 parts by weight of a polymer such as a wax alone or in combination of two or more.

The waterproof sheet used in the present invention is a laminated sheet in which asphalt is laminated on a nonwoven fabric.

The nonwoven fabric used in the present invention is not particularly limited, and examples thereof include polyester fibers fixed by needle punching, polymer binder, or heat fusion. Basis weight of these nonwoven fabrics from 50g / m ² 400g / m
² and preferably in the range of 70 g / m ² to 300 g / m ² . If the basis weight is less than 50 g / m ² , the nail or staple tear strength becomes insufficient when the waterproof sheet is fixed with a locking member such as a nail or staple. On the other hand, if it exceeds 400 g / m ² , the rigidity of the waterproof sheet will be too strong and the construction will be difficult.

Here, the nail or staple tear strength means the practical strength when the waterproof sheet is fixed with nails or staples.
The nail tear strength is 2.from one end of the tarpaulin cut into a rectangle.
The 5 cm portion is fixed with a round nail having a diameter of 5 mm, and the other end is expressed by the strength when pulled by a tensile tester at a speed of 100 mm / min, and the tear strength by the nail is shown mechanically. The staple tear strength is the needle length 1 at the point 2.5 cm from one end of the tarpaulin in the same way.
A staple with a width of 00 mm and a width of 12.9 mm is driven at a right angle to the edge to fix it to a locking material such as wood, and the other end is 100 m with a tensile tester.
It is expressed by the strength when pulled at a speed of m / min, and mechanically shows the tear strength by a nail rod.

The present invention was made by finding that if an asphalt-based waterproof sheet having a large nail or staple tear strength is used, even an asphalt-based waterproof sheet can be sufficiently practically used. The nail or staple tear strength is independent of the tear strength conventionally used for strength evaluation, and even if the normal tear strength is low, it increases according to the basis weight. It is due. For example, the heat-sealing type polyester nonwoven fabric with a basis weight of 98 g / m ^{2 has} a small tear strength in the longitudinal direction of 2.0 kgf, which is apt to be considered insufficient for the insulation method, but the nail tear strength is
14kgf, staple tear strength is as high as 15kgf. further,
When nails or staples are driven through the holding member,
The nail or staple tear strength of the asphalt-based waterproof sheet is further improved, and the strength is sufficient to withstand the insulation method by fixing the nail or staple. Moreover, if the asphalt-based waterproof sheet impregnated with the polymer-modified asphalt in the above-mentioned non-woven fabric is fixed with nails or staples through a circular holding member with a diameter of 40 mm, the nail tear strength will be 38 kgf and the staple tear strength will be 42 kgf, which is sufficiently safe. Is.

The laminated structure of the waterproof sheet obtained by laminating asphalt on the nonwoven fabric used in the present invention is not particularly limited. For example, an asphalt layer in which silica sand or flat crushed stone is bonded on the top layer, and a second layer There may be a layer made of a polyester nonwoven fabric, a third layer having an asphalt layer, and a lowermost layer having a polyolefin film for preventing adhesion. The uppermost layer and the third layer of asphalt are impregnated in the second layer made of the polyester nonwoven fabric. The top and third layers of asphalt may be the same or different. The lowermost polyolefin film may have slits, may have cut holes of various shapes and sizes, or may be a film without any processing. The thickness of the entire waterproof sheet is 1.0 mm to 10.0 mm, preferably 1.5 mm to 8.
0 mm. The unit weight of a waterproof sheet having such a structure and thickness is relatively heavy at 1.2 kg / m ² to 12.0 kg / m ² , and has a feature that it is not easily blown off by wind.

As the locking member used in the present invention, nails or staples made of metal, ceramics, plastics, wood or the like can be used. Specific examples of nails and the like include a head having an area, a portion penetrating a waterproof sheet, and a portion anchored to a locking member.
Examples thereof include nails, round nails, Japanese nails, broken nails, screw nails, tacks, pins, bolts, screw bolts, bolts with plugs and expansion bolts. A large staple is also called a staple, and a specific example thereof is a U-shaped or U-shaped metal rod or the like having both tips sharpened.

The holding member used in the present invention is a member for expanding the head area of a locking member such as a nail or staple, protecting it from an impact when driving the locking portion on the surface of the waterproof sheet, and at the same time ensuring the fixing. Is. The holding member is usually made of metal or plastic and has a diameter or side length of 20 mm to 60 mm.
Round or square with a short side length of 20 mm to 60
It is preferable that the plate is a rectangular plate having a size of mm and a hole through which a locking member such as a nail or a staple passes is previously formed. If the diameter of the holding member and the length of one side or short side are shorter than 20 mm, the tear strength of nails or staples is insufficient and the impact preventing effect is also insufficient. If the length exceeds 60 mm, the overlapping width of the waterproof sheet becomes large, which is uneconomical.

The method of fixing with the locking member is not particularly limited, but it is pierced through the waterproof sheet through the holes of the holding member placed on the waterproof sheet and anchored to the locking material such as wood fixed to the waterproof base. Preferably.

The locking member used in the present invention may be of any material and shape as long as it can be fixed to a waterproof base and an asphalt-based waterproof sheet can be fixed thereon. Specific examples include metals, ceramics, plastics,
Examples include plates, corners, rods, blocks, channels, etc. made of wood, synthetic wood, and the like. Wood boards such as ordinary wood and synthetic wood can be preferably used.

It is necessary that the width of the locking member is equal to or larger than the width of the staple and the thickness thereof is equal to or larger than the length of the nail of the nail or staple, and the one having a hardness suitable for fixing the nail or staple is preferable. Usually, a plate having a width of 20 mm to 200 mm and a thickness of 5.0 mm to 100 mm is preferable. As for the length, those having an appropriate length may be successively used.
These locking materials are previously fixed to the waterproof base with fixing means such as nails and bolts. Since the locking material is much stronger than the waterproof sheet, the number of fixing points is much smaller than when the waterproof sheet is directly fixed to the waterproof substrate.
Since the next step, which is the step of driving nails or staples into the locking material, is extremely easy, even if the step of fixing the locking material to the waterproof substrate in advance is added in this way, the waterproof sheet for the entire waterproofing work is directly applied. The work efficiency is far better than the method of fixing to a waterproof base. The interval of arranging the locking members is adjusted to the width of the waterproof sheet, and more specifically, it is preferable that the distance at the center is the width of the waterproof sheet less the dimension of the portion to be superposed and joined to the adjacent sheet.

An insulating material having a thickness equal to the thickness of the locking material may be laid between the locking materials so that the surface of the waterproof sheet is flat. Examples of the material of these heat insulating materials include plastics such as polyethylene, polystyrene or polyurethane, metals, ceramics, wood and the like.

Place the locking material and heat insulating material side by side, and lay them on the locking material of the tarpaulin so that both ends of the material are covered. This is tentatively called the first column. One end of the long side of this sheet is fixed to the locking member by nails or staples according to the above-mentioned method, if necessary with a holding member.

In the method of the present invention, the waterproof base is not particularly limited, and can be applied to concrete, mortar, ALC, wood, and the like.

The fixing interval by the locking member is determined by the following method. That is, the wind pressure in Chapter 87 of Chapter 3 of the Enforcement Ordinance of the Building Standards Act is set as a standard condition, and it is obtained in the vicinity of a parapet and in a flat field, and this is pulled up and ruptured for each locking member such as nails or staples. The value divided by the strength is the maximum distance for fixing with the locking member. Pull-up rupture strength is the rupture strength when one end is fixed and the other end of the sheet is pulled up at a right angle, but the force in the initial stage of peeling works laterally, so the nail or staple tear strength is It is safer to use.

 For example, wind pressure can be calculated by the following formula.

Wind pressure = Wind coefficient x Wind pressure Here, assuming the rooftop of a building with a height of 30 m, the wind coefficient is 1.5 near the parapet and 0.5 for flat ground. The wind pressure is 280 from the height of the building 30m. Therefore, the wind pressure in the vicinity of the parapet = 1.5 x 280 = 420 kgf / m ² The wind pressure in the flat field = 0.5 x 280 = 140 kgf / m ² .

If the staple tear strength of the tarpaulin is 70 kgf / piece
The number of staples required to fix a 1m ² tarpaulin is around the parapet 420/70 = 6.0 / m ^{2 in a} flat field 140/70 = 2.0 / m ² , so a 1m wide tarpaulin is near the parapet. Can be 17 cm apart and 50 cm apart on flat ground. Since the actually used staples are larger than the staples used in the staple tear test, these values are even safer.

With respect to the waterproof sheet of the first row fixed in this way, the waterproof sheet of the second row is formed such that one end on the long side thereof can sufficiently cover the locking member and the holding member to which the waterproof sheet of the first row is fixed. Are overlapped, and the ends of both waterproof sheets are joined to each other, that is, the overlapping portions are joined. The joining method is a hot-air heating fusion such as a hot-air fusion that is melted and adhered by electrically heated hot air, or a heat-fusion method such as a torch heat fusion that rapidly fuses and adheres by a torch heating, or a solvent-type, reaction-type or hot-melt adhesion The method of adhesive bonding is used. In either case, joining can be performed manually or automatically. In particular, since an automatic joining machine can be used, there is an advantage that joining work can be saved and work efficiency is improved.

[Examples] Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples unless departing from the gist of the present invention.

[Example 1] Straight asphalt (with a nail penetration of 50, Nippon Oil Corporation)
100 parts by weight, styrene. Polymer-modified asphalt consisting of 20 parts by weight of butydiene copolymer (Shell Chemical Co., Ltd., trade name; Califlex TR1116) and 5 parts by weight of polyethylene (Nippon Petrochemical Co., Ltd., trade name; Stafrene E792) is used as polyester nonwoven fabric. (Toyobo Co., Ltd., trade name; Polance 4187P, basis weight 180g / m ² , longitudinal tear strength 1.
0kgf) impregnated and laminated, No. 5 silica sand is attached on the upper part, and a polyethylene film of 10 μm is laminated on the lower part to have a width of 1.0 m
A waterproof sheet 4 having a thickness of 3.0 mm and a unit weight of 3.4 kg / m ² was obtained.
The waterproof sheet 4 has a nail tear strength of 12 kgf, a staple tear strength of 14 kgf, a nail tear strength of 35 kgf and a staple tear strength of 3 when fixed through a galvanized steel plate having a diameter of 50 mm.
It was 8 kgf.

The waterproof sheet 4 was used for repairing the rooftop of a concrete building that leaks rain. Removes the puddle of waterproof base after rain, width 10 cm, thickness 2.5 c while still damp
Timber 1 as a locking material of m, 180 cm in length is arranged at 90 cm intervals (center interval), holes of 5.3 mm in diameter are drilled through the waterproof substrate, and screw bolts of 5.1 mm in diameter 2
I fixed it on the waterproof base. The thickness between the timber and the next timber
Polystyrene foam 3 was spread as a 2.5 cm heat insulating material, and the butted portion was fixed with an adhesive tape. These arrangements are shown in FIG.

Next, as shown in FIG. 2, the above-mentioned waterproof sheet 4 is 10 cm at the long side end (side wrap) of each sheet, and 15 cm at the short side (width) end of each water. I laid them on top of each other. As shown in Fig. 3, the left side wrap is turned down, the right side wrap is turned up, and the galvanized steel plate 5 as a holding member having a diameter of 50 mm is placed on the left side wrap, and a width of 35 mm is applied. A staple (made of steel) 6 as a stopping member was hammered into and fixed to the wood 1 as a locking member through a hole previously made in the galvanized steel plate 5. The direction of the staples 6 is at right angles to the side wrap, and the intervals between the staples 6 are 25 cm in the flat field and 8 cm near the parapet.
And The right side wrap that had been turned up was returned to the original position and overlapped, and they were joined (joint 7) as shown in FIG. 3 using an automatic hot-air fusion machine (Leister variant type manufactured by Karl Leister). Around the roof, around the building, and at the rising part, a manual fusion machine (Leister combi triac type manufactured by Karl Leister) was used to join the waterproof sheets and to bond them to the waterproof substrate. Further, a deaeration tape into which a fine pipe was inserted was partially installed in the rising portion. A silver top coat was applied and finished on the waterproof sheet 4 after the construction. Six months after the construction, it swelled, there was no water leakage, and the beautiful appearance immediately after the construction was maintained.

Example 2 100 parts by weight of straight asphalt (same as in Example 1), 15 parts by weight of atactic polypropylene (softening point: 162 ° C., manufactured by Mitsui Toatsu Chemicals, Inc.), ethylene-vinyl acetate copolymer (vinyl acetate) 25% content, MFR value 2, manufactured by Mitsui Dupont Chemical Co., Ltd., trade name: Evaflex EV360) 1
A polymer-modified asphalt consisting of 0 parts by weight is a polyester non-woven fabric (manufactured by Toyobo Co., Ltd., trade name: Volans 4252)
P, basis weight 230g / m ² , longitudinal tear strength 3.0kgf) impregnated and laminated, No. 5 silica sand attached on top, 10μm polyethylene film on bottom, width 1.0m, thickness 4.0mm, A waterproof sheet 4 having a unit weight of 4.4 kg / m ² was obtained. The staple tear strength of this sheet was 25 kg, and the same strength when fixed through a galvanized steel plate having a diameter of 50 mm was 64 kgf. The waterproof sheet 4 was waterproofed on the newly constructed flat roof in the same manner as in Example 1. Nine months after the construction, it swelled, there was no water leakage, and the beautiful appearance immediately after the construction was maintained.

[Example 3] Instead of the polyester non-woven fabric of Example 1 (weight per unit area of 180 g / m ² ), a polyester non-woven fabric having a weight per unit area of 40 g / m ² (manufactured by Toray Industries, Inc., trade name Axter B504-10, longitudinal tear strength)
A waterproof sheet was prepared in the same manner as in Example 1 using 3.0 kgf). This tarpaulin has a nail tear strength of 2.2 kgf, staple tear strength of 2.6 kgf, and the strength when secured via a galvanized steel sheet with a diameter of 50 mm is 4.6 kgf for nails and 4.9 k for staples.
It was gf, and the strength decreased depending on the basis weight of the nonwoven fabric.

[Example 4] The waterproof sheet of Example 1 was fixed to a holding plate having a diameter of 15 mm with staples. Since this retainer plate is smaller than the width of the staple, the result is that the staple is driven across the retainer plate. The staple tear strength through the retainer plate is
It was 16 kgf, and the increase in strength was small compared to the case where the retainer plate was not used.

[Example 5] Example 1 polyester nonwoven fabric (basis weight 180 g / m ²⁾
Instead of, a polyester non-woven fabric having a basis weight of 520 g / m ² (manufactured by Toyobo Co., Ltd., trade name Borance 4585P, longitudinal tear strength 12.5 kgf) was used to prepare a waterproof sheet in the same manner as in Example 1. The obtained waterproof sheet had sufficient strength, but was inflexible and poor in workability.

[Comparative Example 1] A waterproof sheet was prepared in the same manner as in Example 1 except that a polyester woven fabric (kansa gauze ES-1400, manufactured by Toyobo Co., Ltd.) was used instead of the nonwoven fabric of Example 1. The waterproof sheet had a nail tearing strength of 1.3 kgf, but the waterproof sheet moved easily, the nail hole became large, and it could not be fixed substantially.

[Comparative Example 2] The polyester woven fabric of Comparative Example 1 was replaced with a tight-looking gauze (ES-3000, manufactured by Toyobo Co., Ltd.), but this waterproof sheet can also be substantially fixed as in Comparative Example 1. There wasn't.

[Effects of the Invention] According to the sheet waterproofing method of the present invention, waterproofing can be performed by an insulating method using an inexpensive asphalt-based waterproofing sheet. For this reason, compared with the close contact method which is a general construction method of the same type of waterproof sheet, no skill is required, the drying and curing time of the waterproof base is shortened, and the working efficiency is greatly improved. Since the waterproof sheet obtained by laminating asphalt on the nonwoven fabric used in the present invention has a lower heat-sealing temperature and a smaller pressure load than the chlorinated polyethylene waterproof sheet used in the conventional insulation method, it is easier to join the waterproof sheets to each other. Also, the construction period can be shortened as compared with the insulation construction method using a chlorinated polyethylene waterproof sheet.

[Brief description of the drawings]

FIG. 1 is a specific example showing the arrangement of a wooden board and a heat insulating material. FIG. 2 is a specific example showing the arrangement of the waterproof sheet. FIG. 3 is a specific example showing a method of fixing a waterproof sheet with staples and a method of joining the waterproof sheets. 1: Wood board 2: Screw bolt 3: Heat insulating material 4: Tarpaulin 5: Hold member 6: Staple 7: Joint

Claims (7)

(57) [Claims] 1. One end of a waterproof sheet in which asphalt is laminated on a non-woven fabric is fixed to a locking member fixed on a waterproof substrate with a locking member for fixing the waterproof sheet to the locking member, and the two are adjacent to each other. A sheet waterproofing method comprising laminating one end of another waterproof sheet so as to cover the locking member and joining the laminated surfaces of the sheets. 2. The sheet waterproofing method according to claim 1, wherein the asphalt is a polymer-modified asphalt. 3. The sheet waterproofing method according to claim 1 or 2, wherein the non-woven fabric is made of polyester fiber and the basis weight is in the range of 50 g / m ² to 400 g / m ² . 4. The sheet waterproofing method according to claim 1, wherein the locking member is a nail or a staple. 5. The sheet waterproofing method according to any one of claims 1 to 4, wherein the fixing method using a locking member is a method of locking via a holding member. 6. The holding member is made of metal or plastic and has a circular or rectangular shape having a diameter or one side length of 20 mm to 60 mm, or a rectangular shape having a short side length of 20 mm to 60 mm. The sheet waterproofing method according to any one of 1 to 5. 7. The sheet waterproofing method according to any one of claims 1 to 6, wherein the joining method is adhesion by heat fusion.