JPH01304252A - Heat-insulating and water-proofing work for roof of building - Google Patents

Abstract

PURPOSE:To remove steps in the joint face of water-proof sheets as well as raise the operability of heat-insulating and water-proofing work by a method in which a heat insulator to be set on the roof of building is of a structure having a low porosity on the water-proof sheet side and a step is formed on the joint of the water-proof sheets. CONSTITUTION:A heat insulator 2 having a higher porosity on a slab concrete 1 side on the roof of a building and also having a lower porosity on the opposite side of the thicknesswise direction is laid on the slab concrete 1. Specific steps 4 and 5 are formed on ends of water-proof sheets 3A and 3B bonded to the upside of the heat insulator 2 and lapped on each other for joining. The water- proof sheets having good workability can thus be adopted and no step is produced on the joint face of the sheets.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of insulating and waterproofing a building rooftop, and particularly to a method of constructing a building rooftop structure having a waterproof layer on a heat insulating layer.

[Conventional technology]

Conventionally, in order to waterproof the roof of a concrete building, a method has been widely used in which a sheet is placed on the top surface of a concrete slab, and pressing concrete is poured on top of the sheet. With this method, water may leak from cracks in the holding concrete, and in recent years, a waterproofing method in which a waterproof sheet is pasted has become popular due to its high waterproof performance, excellent weather resistance, and light weight.

In this construction method, the base surface is repaired by removing any unevenness, and after cleaning, a primer is applied.

Next, the sheets are laid out and aligned according to the layout lines, then the joining surfaces of the sheets are heat welded and finished with roller pressing, completing the work.

In addition, in recent years, in order to maintain the insulation performance of building rooftops, for example, a square-shaped insulation material with a predetermined thickness is laid over the entire top surface of concrete slabs, and waterproofing material is pasted on the surface of this insulation material. Problems to be Solved by the Invention] In the above-described method of attaching a waterproof sheet, a step is created at the joint between the waterproof sheets 71 and 72, as shown in FIG.
Not only is it aesthetically undesirable, but if there is a mistake in the alignment width of the overlapping part of the sheet edge, the sheets cannot be pasted parallel to each other (this means that the work must be done carefully, reducing work efficiency. Furthermore, while there is a risk that pedestrians may damage joints and cause water leakage, conventional insulation and waterproofing methods that use the above-mentioned insulation materials use resin foams such as styrene resin as insulation materials. However, these resin foams have a structure with many internal air bubbles from the standpoint of insulation.For this reason, the waterproof material attached to the top of the insulation material should not be made of metal plates such as iron plates for strength reasons. It is used.

However, metal plates such as iron plates are heavy, which not only reduces the efficiency of waterproofing work, but also requires filling the gaps between the metal plates with waterproofing material, which requires great skill.

The purpose of the present invention is to solve the above-mentioned problems of the prior art, to have high work efficiency, to prevent the formation of steps at the joints of waterproof sorting, to have an excellent appearance, and to provide a waterproof sheet that is not damaged by pedestrians. The object of the present invention is to provide a construction method capable of obtaining a heat-insulating and waterproof structure on the roof of a building.

[Failure to solve the problem]

The purpose of the above is to create a structure in which the insulation material installed on the roof of a building has a lower porosity on the opposite side in the thickness direction from the installation surface, that is, on the side of the waterproof channel, and to attach a waterproof sheet to the top surface of the insulation material. This is achieved by forming steps of similar shape at the joints of the two waterproof sheets, and joining both waterproof sheets at this step.

[Function] The heat insulating material laid on the two sides of the slab concrete 1 has a predetermined porosity, and the heat insulating effect is maintained. In addition, the upper surface side of the insulation material (the side to which the waterproof sheet is attached) has a low porosity and high strength, so it is possible to use vinyl chloride resin as a waterproof sheet without using metal plates that reduce work efficiency. A resin sheet with good workability can be used.

Since the waterproof sheet does not have a stepped portion formed on the sheet joining surface, the conventional problems caused by the stepped portion are solved.

(Example〕 Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is an explanatory diagram showing, partially in cross section, a heat insulating and waterproof structure according to the construction method of the present invention. In FIG. 1, a square-shaped heat insulating material 2 is laid on the surface of a concrete slab 1.

As shown in Fig. 2, this heat insulating material 2 has a large porosity on the surface (bottom side, indicated by A in the figure) of the slab concrete 1, and the surface where the waterproof sheets 3A and 3B are attached (
The porosity of the upper surface (indicated by B in the figure) is small. Therefore, when the heat insulating material 2 is made of the same components, the upper surface side has lower flexibility and has a structure in which deformation due to pressure from above is extremely small. The heat insulating material 2 can be easily manufactured by forming a layered part with a lower porosity and a layered part with a higher porosity and joining them together. Become something.

Further, since the heat insulating material 2 maintains sufficient porosity throughout its thickness, the heat insulating performance is not impaired.

After a plurality of such insulation materials 2 are laid over the entire upper surface of the slab concrete 1, waterproof sheets 3A, 3B, etc. are pasted on the upper surface of the insulation materials 2 via a suitable bonding material. . As shown in FIG. 3, each waterproof sheet has stepped portions 4.degree. 5 of similar shape to each other, and as shown in the figure, the two are joined to form a waterproof layer. Waterproof sheath 1-3A shown in FIG.

As a means for joining 3B, for example, a method of joining the joint surfaces with an adhesive, a method of joining the joint parts by thermal welding, etc. can be adopted.

FIG. 4 shows a method of attaching reinforcing tape 6 to the back and/or front surfaces of the joints of the waterproof sheets 3A and 3B. When the reinforcing tape 6 is placed on the back side as shown in the figure, there is no need to particularly consider the color of the tape, but when it is pasted on the front side, the color of the reinforcing tape 16 should correspond to the color of the waterproof sheets 3A and 3B. , or a transparent tape is preferable. The reinforcing tape 6 can be attached to the waterproof sheet by heat welding instead of by adhesive.

In FIG. 5, the width of the step 4 of one waterproof sheet 3A is made smaller than the width of the step 5 of the other waterproof sheet 3B so that a recess is formed when the two are overlapped. A heat-sealing adhesive 7 such as a thermoplastic resin or the like is placed in this recess. The adhesive shown in FIG.
In addition, the waterproof sheet has a convex shape with a sheet-like portion 6 on the lower surface. That is, a method that combines the joining means shown in FIGS. 4 and 5 is employed.

To form the steps shown at the ends of the tarpaulin,
In addition to pressing the edge of the sheet with a roller having irregularities corresponding to the shape of the stepped portion or grinding it with a drum-shaped cutter, one of the two sheets is made to have a width shorter than the other, and both of the sheets are cut. A stepped portion may be formed between both sheets at the manufacturing stage of laminating the two sheets.

[Effects of the Invention] As described above, according to the present invention, it is possible to maintain the desired thermal insulation performance on the roof of a building, and there is no step at the end joints of the waterproof sheet, resulting in excellent aesthetic appearance and the prevention of water leakage from the joints. This eliminates the risk of damage to joints caused by pedestrians, and provides higher work efficiency than conventional construction methods.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a partial cross section of the heat insulation and waterproof structure according to the construction method of the present invention, Fig. 2 is an enlarged perspective view of the heat insulating material in Fig. 1, Fig. 3, Fig. 4, Fig. 5, and Fig. 6 is a sectional view showing an example of joining the waterproof sheets in the structure shown in FIG. 1, and FIG. 7 is an explanatory diagram showing an example of conventional waterproof sheets joining. ■...Slab concrete, 2...Insulation material, 3A, 3B...Waterproof sheet, 4.5...Steps, 6...・Reinforcement tape, 7...Adhesive. Patent applicant Akikichi Tateno Attorney Patent attorney Masaru Nishimoto −

Claims (1)

[Claims] (1) A heat insulating material with a high porosity on the slab concrete surface on the roof of a building and a low porosity on the opposite side in the thickness direction is laid, and a certain step is placed at the end of the insulating material. A method of insulation and waterproofing on the roof of a building, characterized by overlapping the stepped portions of the waterproof sheet formed with the sections to be joined, and joining the overlapping portions.