JP2552969B2 - Insulation and waterproof construction method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof construction method applied to a rooftop of a building.

[0002]

2. Description of the Related Art In recent years, as a waterproofing method for roofs of buildings, etc., a waterproofing method using a torch burner is prevailing in place of the asphalt waterproofing thermal method which has been the mainstream until now. The reason is that the waterproof construction method by the torch burner is
Compared with the asphalt waterproof thermal construction method, the number of processes is small,
This is because there are merits such as high reliability of the watertightness of the joint between the waterproof sheets.

[0003]

However, in the waterproof construction method using the torch burner, since the entire surface of the waterproof sheet is heated and melted by the torch burner to be attached, considerable labor and time are required. In addition, in order to perform heat insulating and waterproofing with the torch burner, a heat insulating plate is attached and laid on the base, and when waterproofing the waterproof sheet on the laying surface, the back surface of the waterproof sheet is exposed by the flame of the torch burner. If the melted surface is melted and adhered to the laying surface of the heat insulating plate, the flame or strong wind may cause damage such as burning of the heat insulating plate. After sticking a thin waterproof sheet with an adhesive layer applied to the back surface in advance on the entire upper surface of the
Since a thick polymer-modified asphalt waterproof sheet was blown and melted on the entire back surface with a flame using the torch burner from above, the fused surface was fused to the upper surface of the base waterproof sheet. It requires many steps, requires a lot of labor and time, and is uneconomical. Further, as the torch burner, in order to perform the work of fusing the entire surface of the waterproof sheet with a flame and fusing it with high efficiency, in general, a large construction device including a trolley equipped with a five-series torch burner is used. I need. Furthermore, since the flame temperature of the torch burner is as high as 1200 ° C. or higher, when a worker with a low skill level handles it, the thin base waterproof sheet is excessively burned by the flame or hot air, This causes inconveniences such as the presence of holes, which may damage the heat insulating plate under the holes such as burning.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned inconveniences of the conventional heat-insulating and waterproofing method using a torch burner, simplifies the construction work, reduces the number of steps, and easily and speedily torch burner. It provides a good and reliable insulation and waterproofing method without any risk of damage to the heat insulating plate due to the use of a thick asphalt-based coating layer on the entire back surface or on one side of the outer side wrap. Provide the entire surface of the adhesive or a partial coating layer on the entire back surface excluding parts,
Prepare a desired number of waterproof sheets made by temporarily attaching release paper to the surface of the adhesive coating layer, and in order to sequentially attach these waterproof sheets to the laying surface of the heat insulating plate laid on the base to be waterproofed,
In the adjacent waterproof sheets, one of the waterproof sheets is attached to the laying surface of the heat insulating plate via the adhesive coating layer on the back surface thereof, and the back surface of the inner side wrap portion of the side wrap portion on the one side. Is superposed on the upper surface of the outer side wrap of the other side wrap of the other waterproof sheet to form an adhesive seal between these upper and lower side seals. Of the outer side seal portion of the upper side seal portion of the waterproof sheet of FIG. It is characterized by forming a fused seal portion that is fused and bonded to each other.

[0005]

According to the heat insulating and waterproofing method of the present invention described above, the entire waterproofing sheet can be easily waterproofed by simply sticking each of the waterproof sheets to the laying surface of the heat insulating plate with the adhesive coating layer on the back surface thereof. Not only the construction layer is obtained, but in the side wrap portions of the respective adjacent waterproof sheets, after forming the polymerized adhesive seal portions with each other via the adhesive coating layer portion, one of the one side is formed by the torch burner. Since the back surface of the outer side wrap portion of the side wrap portion of the waterproof sheet and the surface of the other waterproof sheet are burnt and melted, the adhesive seal portion previously formed on the inside of the waterproof sheet has the flame and hot air of the torch burner. It acts to protect the insulation from touching and prevent its damage. Therefore, the torch burner can perform the fog melting work properly and appropriately without any anxiety and does not require skill. Next, the melted surface is pressed against the melted surface of the side lap portion thereunder, whereby they are heat-fused with each other to form a melt-sealed portion having strong watertightness. As described above, since heating and melting of each waterproof sheet by the torch burner is sufficient for only one side edge thereof, work time is shortened by the torch burner and labor is saved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the heat insulating and waterproofing construction method of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a perspective view in which a part of a long and thick waterproof sheet used in one example of implementation of the heat insulating and waterproofing method of the present invention is cut, and using this, heat insulation is performed as shown in FIG. Perform waterproof construction. That is, in the drawings
Reference numeral 1 denotes a thick asphalt-based waterproof sheet. The waterproof sheet 1 includes a thick asphalt-based coating layer 1a formed by thickly coating both surfaces of a core material (not shown), a pressure-sensitive adhesive coating layer 1b formed on the back surface of the coating layer and a pressure-sensitive adhesive coating thereof. Layer 1b
When used, the release paper 1c is temporarily attached so that it can be released as shown in the figure, and the surface of the thick asphalt-based coating layer is covered with mineral powder particles, that is, sand or pasted. And a coating layer 1d such as a polyethylene film. In the illustrated example, a so-called sandy waterproof sheet 1 having a coating layer 1d in which sand is dispersed is shown. In the sanded waterproof sheet 1, the sand on the surface of the side wrap portion 2 on one side is generally a fine-grained mineral powder, and this is generally spread in a strip shape extending in the lengthwise direction with a predetermined width. is there.

The thick asphalt coating layer 1a has a thickness of 3 mm or more. As the asphalt-based waterproof material constituting the asphalt-based coating layer 1a, blown asphalt, catalyst blown asphalt, or polymer-modified asphalt or a mixture of mineral powder such as talc with these asphalts is used. However, it is preferable to use polymer-modified asphalt, and in the illustrated example, the core material is used to thickly coat both sides of the core material. The polymer-modified asphalt is usually obtained by adding styrene-butadiene-
Styrene rubber and atactic polypropylene (APP)
It is an asphalt with improved properties by adding an appropriate amount of polymer such as resin. It melts due to the flame of a torch burner, but it does not cause significant deformation and has good heat resistance.

The core material to which such an asphalt waterproof material is applied is a non-woven fabric such as polyester fiber, vinylon fiber or glass fiber, a plastic film sheet such as nylon or polyethylene, or a metal foil such as aluminum. Any of these may be used, but it is most preferable to use a polyester non-woven fabric which is well suited to the asphalt waterproofing material, has appropriate strength and elongation, and is excellent in heat resistance, water resistance, dimensional stability and the like. In the illustrated example, the polyester non-woven fabric was used.

The pressure-sensitive adhesive coating layer 1b generally has a thickness of about 0.5 mm. The pressure-sensitive adhesive coating layer 1b may be formed by applying the pressure-sensitive adhesive entirely or partially on the entire back surface of the asphalt-based coating layer 1a to form a full-surface coating layer or a partial coating layer. The adhesive is entirely or partially applied to the entire back surface except the back surface of the outer side wrap portion 2a extending in the lengthwise direction in a band shape from the outer edge of the side wrap portion 2 having a predetermined width on one side. To form a full-coated layer or a partial coated layer. In the illustrated example, the entire surface of the back surface excluding the back surface of the outer side wrap portion 2a extending in a band shape in the length direction from the outer edge of the side wrap portion 2 having a predetermined width on one side is entirely covered with an adhesive. 1 shows a waterproof sheet 1 which is applied to form an overall coating layer. The waterproof sheet of the present invention having any of the above-mentioned shapes has a pressure-sensitive adhesive coating layer 1b provided on the back surface of the waterproof sheet.
In addition to the back surface to be attached to the laying surface of the heat insulating plate in the heat insulating and waterproofing work described later, as will be described later, the side wrap portion 2 of the waterproof sheet on the side covered with the torch burner is used.
Is coated and formed on at least the back surface of the inner side wrap portion 2b including a pressure-sensitive adhesive coating layer portion 1b 'extending in the lengthwise direction with a predetermined width. Therefore, the waterproof sheet 1 of the illustrated embodiment has a pressure-sensitive adhesive covering the entire back surface from the inner side wrap portion 2b of the side wrap portion 2 on the one side to the edge of the side wrap portion 2 on the other side over the entire width. Of the side coating portion 1b, which has the adhesive coating layer portion 1b 'on the back surface of the inner side wrap portion 2b of the side wrap portion 2 on one side thereof. As the pressure-sensitive adhesive forming the pressure-sensitive adhesive coating layer, a rubber-based pressure-sensitive adhesive obtained by adding a resin that imparts pressure-sensitive adhesiveness to rubber or rubberized asphalt, process oil, or the like is usually used.

[0010] According to page 43 of "Guideline for Construction of Modified Asphalt Sheet Waterproof Torch Construction Method and Commentary 1990 Established" by the Architectural Institute of Japan, the overlapping width of the waterproof sheet is 80 in the longitudinal direction.
Since the width is defined to be not less than mm, in the illustrated example, the side wrap portion 2 on the one side of the waterproof sheet 1 has a length direction of 100 mm.
The width of the outer side wrap portion 2a is 80 mm.
mm, the width of the inner side wrap portion 2b is 20 mm
Then, a strip-shaped adhesive coating layer 1b was provided on the back surface of the inner side wrap portion 2b.

A large number of the roll-shaped waterproof sheets 1 shown in FIG. 1 having the above-mentioned structure are prepared, and as shown in FIG. 2, the heat insulating and waterproofing work of the present invention is applied to a concrete ground such as a roof of a building. That is, in FIG. 2, reference numeral 3 denotes a concrete base, on which the required number of a large number of heat insulating plates 4 are sequentially laid via an adhesive coating layer 5 applied to the surface of the base 3.

As the heat insulating plate 4, in addition to foamed synthetic resin molded plates such as polyurethane type, polystyrene type, polyethylene type, etc., organic heat insulating plates such as wood wool cement plate, siding board, etc., inorganic heat insulating substances such as foam glass, glass wool, etc. Plates and the like can be mentioned, and these are appropriately selected and used. In the illustrated example, a foamed urethane molded plate is used.

As the adhesive 5, various kinds of adhesives of solvent type, emulsion type and reaction hardening type can be used.
In particular, it is preferable to use a water-resistant adhesive such as an asphalt-based, urethane-based, or epoxy-based adhesive. In the illustrated example, a urethane-based adhesive is used.

According to the present invention, the thick waterproof sheet 1 shown in FIG. 1 is directly superposed on the entire laying surface of the heat insulating plate 4 in the following order to complete the heat insulating and waterproofing work. The use of a thin waterproof sheet, which was necessary for the conventional insulation and waterproof construction method due to dust, was abolished, and the work of burning the entire back surface of the thick waterproof sheet with a flame by a torch burner was abolished. Made it possible to perform efficient heat insulation and waterproof construction.

That is, when the above-mentioned waterproof sheets 1, 1, ... Are sequentially crimped to the laying surfaces of the heat insulating plates 4, 4, ... With the adjacent side wrap portions 2, 2 being overlapped with each other. , Each of the waterproof sheets 1 is entirely adhered to the laying surface of the heat insulating plates 4, 4, ... Through the adhesive coating layer 1b on the back surface thereof, and the side wrap portion 2 on the one side is the inner side surface. The adhesive on the rear surface of the wrap portion 2b is already attached to the laying surface of the heat insulating plates 4, 4, ... Adjacent to the heat insulating plate 4, 4 through the adhesive coating layer portion 1b 'which is a part of the adhesive coating layer 1b on the rear surface. It is attached to the upper surface of the outer side wrap portion 2a of the side wrap portion 2 on the other side of the waterproof sheet 1 that is attached via the agent coating layer 1b, and the length between the side wrap portions 2 and 2 is inside thereof. Stacking of waterproof sheets 1 and 1 provided with a sticking seal portion S made of a strip-shaped adhesive that is long in the direction Part can be obtained.

According to the present invention, between the side wrap portions 2 and 2 of the waterproof sheets 1 and 1 which are adjacent to each other in this manner, as described above, the desired width is provided on the inside thereof along the length direction thereof. In the illustrated example, a band-shaped sticking seal portion S having a width of 20 mm
After forming, the outer side wrap portions 2a and 2b are heated and melted by the torch burner 6, and polymerized and bonded to form a belt-shaped heat seal portion H having a predetermined width of 80 mm and extending in the longitudinal direction. By this, the work of blowing the torch burner 6 with the flame is performed on the back surface of the outer side wrap portion 2a released from the side wrap portion 2 on one side of the waterproof sheet 1 and adjacent to the opposite side. When the surface of the inner side wrap portion 2b of the side wrap portion 2 on the other side of the waterproof sheet 1 is melted by the flame of the torch burner 6 inserted between them, the outer side wrap portion 2a of the outer side wrap portion 2a is melted. The inner side wrap portion 2 below the melting back surface
By press-bonding to the melting surface of b, the heat-sealing portion H is obtained by a watertight and strongly fused bond between the upper and lower outer side wrap portions 2a and 2b which are superposed on each other.

Thus, the flame and hot air in the above-described burning operation by burning the torch burner 6 with the flame from the heat insulating plates 4, 4, ... Insulated, there is no danger of damaging the heat insulating plates 4, 4, ... At all, the operation by the torch burner 6 requires no skill, and the heat insulating and waterproofing work with no work loss can be performed. . The width of the adhesive seal portion S is 20 mm in the embodiment, but at least 2 mm is sufficient, and up to 20 mm is usually sufficient. Thus, it is possible to save the uneconomical, labor, and time required to apply the thin waterproof sheet required for the conventional heat insulating and waterproofing to the entire laying surface of the heat insulating plate. Further, according to the present invention, as described above, since the burning and melting work by the torch burner only needs to be applied to the side wrap portion of each waterproof sheet, the entire surface of each waterproof sheet is burned and fused as in the conventional method. In comparison, the labor and time required for the work are remarkably reduced, and the use of a handy type torch burner is sufficient, and the heat insulating and waterproofing construction can be obtained easily and quickly economically.

The waterproof sheet 1 used in the above embodiment
When the waterproof sheet 1 is formed in such a manner that the outer side wrap portion 2a, which is rubbed with the torch burner 6 in advance, is not provided with an adhesive coating layer, the amount of the adhesive used is equal to the outer side wrap portion 2a.
Although the amount of the adhesive used is small compared to the case where the pressure-sensitive adhesive coating layer is provided on a as well, it is economical, but the adhesive is also provided on the side wrap portion 2a. That is, even if the waterproof sheet 1 of the type in which the adhesive coating layer 1b is provided on the entire back surface of the asphalt-based waterproof layer 1a is used, it can be applied to the heat insulating and waterproofing method of the present invention similarly to the above. is there.

In the above two types of waterproof sheets,
The surface corresponding to the laid surface of the heat insulating plate 4 is partially coated with a pressure-sensitive adhesive in a dot shape, a stripe shape, a grid shape or the like to provide a partial coating layer, thereby further saving the consumption amount of the pressure-sensitive adhesive. Further, the manufacturing cost can be further reduced, and furthermore, the heat insulating plate 4 can be evenly partially adhered to the laying surface of the heat insulating plate 4, resulting in a more economical heat insulating and waterproofing work. However, in this case, the waterproof sheet 1
The adhesive coating layer portion 1 on the back surface of the side wrap portion 2 on one side of the
Regarding b ', in order to act as a sticking seal portion S for the flame and hot air of the torch burner, it is always necessary to provide it in a linear or strip-shaped continuous coating layer having a predetermined width and extending in the length direction of the waterproof sheet. There is.

One example of the method for producing the waterproof sheet 1 of such a type is as follows. An adhesive is applied to the entire back surface of the long asphalt waterproof layer 1a to form an adhesive coating layer, and then the adhesive is applied. A release paper to be temporarily attached to the coated layer surface is provided at a position corresponding to a boundary between the width of the side wrap portion 2 on one side of the waterproof sheet 1 and the outer side wrap portion 2a and the width of the inner side wrap portion 2b. A narrow strip-shaped release paper 1c temporarily adhered to the adhesive coating layer portion on the back surface of the outer side wrap portion 2a and an adhesive agent on the entire remaining rear surface by temporarily attaching the slitter slit along the entire length in the length direction. It is manufactured so that the wide strip-shaped release paper 1c temporarily attached to the coating layer can be separately released. In addition, a sand or film coating layer 1d was provided on the surface, and the product was rolled.

FIG. 2 shows a situation in which the heat insulating and waterproofing method of the present invention is sequentially carried out by using a desired number of roll-shaped waterproof sheets 1 of the type in which an adhesive is applied to the entire surface thus manufactured. . In the drawing, in a state where the roll-shaped waterproof sheet 1 is overlapped with the side wrap portion 2 on one side thereof on the side wrap portion 2 on the other side of the adjacent waterproof sheet 1 already attached to the laying surface of the heat insulating plate 4. Peel off the wide strip-shaped release paper 1c,
The waterproof sheet 1 on the laying surface of the heat insulating plate 4 and the lower surface thereof is unwound and unfolded, and the exposed wide adhesive coating layer 1b is interposed therebetween.
The side wrap portion 2 on the other side is attached to the surface of the outer side wrap portion 2b. Next, the thin strip-shaped release paper 1c temporarily attached to the back surface of the outer side wrap portion 2 of the polymerized upper waterproof sheet 1 is peeled off, and the back surface and the inner side of the waterproof sheet 2 below it. The surface of the side wrap portion 2b is burned with a flame of a torch burner, and the melting back surface of the outer side wrap portion 2 at the upper portion thereof is pressure-bonded to the melting surface of the inner side wrap portion 2b at the lower portion thereof to fuse and bond to heat. Form a seal. In this way, the heat insulating and waterproofing method of this method is repeated to obtain a waterproofing surface having a strong overlapping portion on the entire desired surface area of the base.

When performing the heat insulating and waterproofing work of the present invention, when it is necessary to seal and bond the adjacent end faces as the above-mentioned waterproof sheet 1 to be used, the end lap portion thereof should have the above waterproofing property. According to the construction guidelines for the torch construction method, the width of the torch burner that is melted by the flame is at least 100 mm in the outer end wrap portion, and the inside is at least 2 mm to 20 mm in the inner end wrap portion, and at least 102 mm in total. Take the end wrap part of.

Next, a more specific embodiment of the present invention will be described. 25m thick on the concrete rooftop of the building
m, 605 mm (width) x 910 mm (length) of a large number of foamed heat insulating plates were attached via a urethane curing reaction type adhesive. Separately, on the back surface of a thick asphalt coating layer having a thickness of 4.5 mm formed by coating the core material with SBS rubber-modified asphalt, a 0.5 mm pressure-sensitive adhesive coating layer is provided on one side of the side wrap having a width of 100 mm. 1m (width) x 8m (length) modified asphalt with sand on the entire surface except the width of 90 mm of the outer side wrap part and by temporarily attaching a strip-shaped release paper to the surface of the adhesive layer Prepare a large number of rolls of a waterproof sheet consisting of a roofing, and spread the roll-shaped waterproof sheet on the laying surface of the heat insulating plate by peeling off the release paper on the surface and sticking the adhesive on the back surface. After sticking through the agent coating layer surface, the adjacent waterproof sheet with the side wrap portion on one side overlapped with the surface of the side wrap portion on one side of the sticking waterproof sheet, and the release paper on the surface Peel it off and unfold it to create an adhesive on the back The side wrap of the waterproof sheet below is attached to the laying surface of the heat insulating plate through the layer surface and at the same time through the adhesive coated layer surface on the back side of the inner side wrap portion having a width of 10 mm inside the side wrap portion. It was affixed to the surface of the inner side wrap of the part. Next, the back surface of the free outer side wrap portion having a width of 90 mm without the adhesive layer in the upper side wrap portion and the inner side wrap portion of the lower side wrap portion facing the outer side wrap portion Burn the surface with the flame of a torch burner, dissolve the surface of the modified asphalt coating layer, respectively,
In this state, the fusion surface of the outer side wrap portion at the upper portion was pressed against the fusion surface of the outer side wrap portion at the lower portion to fuse and bond each other. Thus, a watertight and strong heat-sealed portion was obtained on the side wrap portions of the adjacent waterproof sheets.

[0024]

As described above, according to the heat insulating and waterproofing construction method of the present invention,
Lever, tarpaulin pre entirely or partially coated layer of the entire back surface to the adhesive, except for the outer side wrapping portion of the side wrapping portion of the entire back surface or the 1 side of the asphalt-based coating covering layer thick
Since the order provided Rutotomoni release paper to this are temporarily stuck, its
Per the construction, it can easily be attached to the laying surface of the insulating plate which is laid by peeling the release paper to the substrate to be applied by only allowed to expose its adhesive coating layer surface Rutotomoni, side wrapping its Tonariru tarpaulin It is possible to easily form a sticking seal portion on the inner side between these overlapped side wraps by polymerizing and sticking to the upper surface of the inner side wrap portion of the section . Next, the back surface of the outer side wrap portion of the upper side wrap portion and the upper surface of the inner side wrap portion of the lower side wrap portion are melted by a flame of a torch burner, and the molten back surface is melted upper surface. Since the heat-sealed portion fused and bonded to each other was formed by crimping to, the flame and the hot air were blown inside the heat-sealed portion by the pasting-sealed portion formed in advance between these side wraps in the melting work by the torch burner. Hit the laying surface of the heat insulating plate and damage it.
There can be prevented, a skilled can perform work smoothly and easily torch burner without requiring Watertight between side wrapping portion can form a good heat insulating waterproof structure without damage to the robust and insulation board. Further, according to the heat insulating and waterproofing method of the present invention described above, it is possible to omit the step of constructing a thin waterproof sheet base, which is required in the conventional heat insulating and waterproofing method, and the entire surface of each waterproof sheet is covered with a torch burner. It does not need to be melted and only needs to be melted by burning only the side wrap part, so the work time with the torch burner can be shortened, labor is saved, and the use of a handy type torch burner is sufficient, so insulation and waterproof construction is easy. In addition, it has an effect such as high efficiency and a reduction in construction cost.

[Brief description of drawings]

FIG. 1 is a partial perspective view of an example of a waterproof sheet used in a heat insulating and waterproofing method of the present invention.

FIG. 2 is a partially cutaway cross-sectional view showing an example of implementation of the heat insulating and waterproofing method of the present invention using the waterproof sheet shown in FIG.

FIG. 3 is a perspective view showing an example of another embodiment of the present invention.

[Explanation of symbols]

1 Asphalt Waterproof Sheet 1a Thick Asphalt Coating Layer 1b Adhesive Coating Layer 1b 'Adhesive Coating Layer 1c Release Paper 2 Side Wrap 2a Outside Side Wrap 2b Inside Side Wrap 3 Concrete Base 4 Heat Insulation Board 5 Adhesion Agent coating layer 6 Torch burner S Adhesive seal part H Heat seal part

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Bibliography Sho 55-110628 (JP, U) Japanese Patent Sho 49-46978 (JP, B2) Actual Sho 57-27838 (JP, Y2)

Claims (1)

(57) [Claims] 1. An entire surface or a partial coating layer of an adhesive is provided on the entire back surface of a thick asphalt-based coating layer or on the entire back surface excluding the outer side wrap portion of the side wrap portion on one side thereof,
Prepare a desired number of waterproof sheets made by temporarily attaching release paper to the surface of the adhesive coating layer, and in order to sequentially attach these waterproof sheets to the laying surface of the heat insulating plate laid on the base to be waterproofed,
In the adjacent waterproof sheets, one of the waterproof sheets is attached to the laying surface of the heat insulating plate via the adhesive coating layer on the back surface thereof, and the back surface of the inner side wrap portion of the side wrap portion on the one side. Is superposed on the upper surface of the outer side wrap of the other side wrap of the other waterproof sheet to form an adhesive seal between these upper and lower side seals. Of the outer side wrap portion of the upper side seal portion of the tarpaulin of FIG. 2 is fused and melted, and the melted back surface is pressure-bonded to the fused and melted upper surface of the inner side wrap portion of the lower side wrap portion of the other tarpaulin. A heat-insulating and waterproof construction method characterized by forming a fusion-bonded fused seal portion.