JP7435321B2 - Metal roof and its waterproof construction method - Google Patents

Description

The present invention relates to a metal roof having a waterproof layer and a construction method for forming a waterproof layer on a metal roof.

When forming a waterproof layer on a metal roof, as shown in Figure 3, a heat insulating layer 2 made of foamed urethane or the like is formed on the metal roof body 1 by foam spraying, and a waterproof coating layer 3 is sprayed on top of it. A protective top layer 4 is formed thereon by spraying to form a waterproof layer 5 (for example, Patent Document 1). In FIG. 3, the metal roof main body 1 has a corrugated plate shape in which a plurality of peaks 1a and valleys 1b are continuous via an inclined wall 1c, and the top surface of the peaks 1a is a flat surface. .

In the metal roof main body 10 of FIG. 4, a protrusion (a bevel) 1d projects upward from the peak 1a. As shown in FIG. 5, the protrusion 1d is formed by fitting the side edges 1e and 1f of adjacent folding plates 1A and 1B (for example, Patent Document 2).

Japanese Patent Application Publication No. 2008-69563 Japanese Patent Application Publication No. 2018-16855

A waterproof layer formed by a conventional construction method (for example, waterproof layer 5 in FIG. 3) is in close contact with the entire top surface of the metal roof body 1.

In such metal roofs, when moisture enters the interface between the waterproof layer 5 and the metal roof bodies 1 and 10 due to rain, dew condensation, etc., the moisture evaporates and expands during high-temperature periods such as summer, causing the waterproofing to deteriorate. The layer 5 may expand so as to be pulled away from the metal roof body 1, 10, creating an expanded area called a bulge.

An object of the present invention is to provide a metal roof that prevents such waterproof blistering, and a construction method therefor.

The gist of the present invention is as follows.

[1] In a metal roof that has a metal roof body that has peaks, valleys, and a sloped wall between the two, and a waterproof layer formed on the top surface of the metal roof body, the valleys of the metal roof body A metal roof characterized by interposing an intermediate layer between the waterproof layer and the waterproof layer, which adheres to the troughs and does not adhere to the waterproof layer.

[2] The metal roof of [1], wherein the intermediate layer is a craft tape attached to the valley and extending in the longitudinal direction of the valley.

[3] The metal roof main body has a protrusion rising from the peak,
A sheet is attached between the protrusion and the upper part of the inclined wall, and a space is formed surrounded by the protrusion, the sheet, and the mountain,
The metal roof according to [1] or [2], wherein the waterproof layer is provided on the outer surface of the sheet.

[4] In a metal roof that has a metal roof body having peaks, valleys, a sloped wall between the two, and a protrusion rising from the peaks, and a waterproof layer formed on the top surface of the metal roof body. , a space between the protrusion and the upper part of the inclined wall is covered with a sheet, a space surrounded by the protrusion, the sheet and the mountain is formed, and the waterproof layer is provided on the outer surface of the sheet. A metal roof that is characterized by

[5] The metal roof according to [3] or [4], wherein the sheet has a base material made of synthetic resin or natural resin, and an adhesive applied to the base material.

[6] The metal roof according to any one of [3] to [5], wherein the sheet is a butyl tape.

[7] In a method for waterproofing a metal roof in which a waterproof layer is formed on the upper surface of a metal roof body having peaks, valleys, and a sloped wall between the two, a waterproof layer is formed on the top of the valley of the metal roof body. A metal roof characterized in that the waterproof layer is formed after forming an intermediate layer that adheres to the surface of the metal roof and does not adhere to the waterproof layer.

[8] The method for waterproofing a metal roof according to [7], wherein the intermediate layer is formed by applying a craft tape to the valley so as to extend in the longitudinal direction of the valley.

[9] The metal roof main body has a protrusion rising from the mountain,
The space between the protrusion and the upper part of the inclined wall is covered with a sheet, and the waterproof layer is formed after a space surrounded by the protrusion, the sheet, and the mountain is formed.[7] Or the method for waterproofing a metal roof according to [8].

[10] In a method for waterproofing a metal roof in which a waterproof layer is formed on the upper surface of a metal roof body having peaks, valleys, an inclined wall between the two, and a protrusion rising from the peak, the protrusion and Waterproofing construction for a metal roof, characterized in that the waterproof layer is formed after a sheet is pasted between the upper part of the inclined wall part and a space surrounded by the protrusion, the sheet, and the mountain part. Method.

[11] The method for waterproofing a metal roof according to [9] or [10], wherein the sheet has a base material made of a synthetic resin or a natural resin, and an adhesive applied to the base material.

[12] The method for waterproofing a metal roof according to any one of [9] to [11], wherein the sheet is a butyl tape.

In the metal roof of one aspect of the present invention, an intermediate layer made of craft tape or the like is formed on the upper surface of the valley of the metal roof body. This intermediate layer is non-adherent to the waterproof layer. Therefore, if water that has entered between the waterproof layer and the metal roof body near the valley evaporates and generates water vapor, this water vapor or air containing water vapor will enter between the intermediate layer and the waterproof layer, Diffusion widely along the layer. This prevents the waterproof layer from blistering.

In the metal roof of another aspect of the present invention, a space is formed along the protrusion of the metal roof body. Therefore, when water that has entered between the waterproof layer and the metal roof body near the mountain portion evaporates and water vapor is generated, this water vapor or air containing water vapor enters the space and widely diffuses. This prevents the waterproof layer from blistering.

According to the metal roof waterproofing construction method of the present invention, such a metal roof can be easily constructed.

It is a sectional view explaining the waterproofing construction method of the metal roof concerning an embodiment. It is an enlarged view of part II of FIG. 1(c). It is a block diagram of a conventional metal roof. It is a sectional view of a metal roof main body (beam type roof). It is an enlarged cross-sectional view of the metal roof main body (beam type roof). It is a sectional view of a metal roof main body (layered roof).

Hereinafter, embodiments will be described with reference to FIGS. 1 and 2.

An example of a metal roof is shown in FIG. 4 as an example of the metal roof main body 10 shown in FIG. 1(a). As described above, it has the peak portions 1a, the valley portions 1b, and the inclined wall portions 1c. Further, a projection 1d stands upward from the peak 1a. The metal roof main body 10 includes, in addition to metal roofs typified by the seam roof shown in FIG. 4 and the stacked roof shown in FIG. 6, corrugated sheet roofs, tile rod roofs, and the like.

As shown in Fig. 1(b), by pasting the craft tape 11 on the upper surface of the trough 1b so as to extend in the longitudinal direction of the trough 1b (in the direction perpendicular to the plane of the paper in Figs. 1 and 2), the waterproof layer Forms a non-stick intermediate layer. The kraft tape 11 is a commercially available product, and is made of a base tape made of kraft paper, provided with an adhesive layer on one side, and laminated with a synthetic resin on the other side. The craft tape 11 is attached to the valley portion 1b via the adhesive layer.

The width W ₁ of the craft tape 11 is preferably about 3 to 95%, particularly about 25 to 85%, of the width W ₂ of the valley portion 1b.

Further, in this embodiment, the sheet 12 covers the protrusion 1d so as to reach the inclined wall parts 1c, 1c on both the left and right sides of the protrusion 1d.

The sheet 12 has a base material made of synthetic resin or natural resin. As the base material, those molded by extrusion molding, injection molding, etc., or those processed into woven fabrics, nonwoven fabrics, etc. can be used. An adhesive can be further applied to one surface of the base material so as to cover the protrusions (protrusions). Further, as the sheet 12, it is also possible to use a commercially available tape coated with an adhesive in advance. For example, one or both sides of a tape base made of a synthetic fiber non-woven fabric made of polyester non-woven fabric etc. may be coated with a butyl rubber adhesive. Butyl rubber tape or the like coated with an agent can be used. Butyl rubber tape has elasticity and air permeability, has high adhesion to the metal roof body, has good adhesion to the waterproof layer, is inexpensive, and has good durability, so it is suitable.

The thickness of the sheet 12 is preferably 0.01 to 10 mm, more preferably 0.1 to 5 mm.

The sheet 12 extends obliquely from the top of the projection 1d through the intersection of the peak 1a and the inclined wall 1c, and is attached to the upper part of the inclined wall 1c. Therefore, a space S is formed between the sheet 12, the projection 1d, and the upper surface of the peak 1a.

In addition, the above-mentioned space S can also be formed by fixing a sheet previously molded into a concave shape so as to cover the protrusion (protrusion).

The overlapping width t between the sheet 12 and the inclined wall portion 1c is preferably about 5 to 200 mm, particularly about 10 to 100 mm.

After pasting the craft tape 11 and the sheet 12 in this way, the heat insulating layer 2, the coating layer 3, and the top layer 4 are sprayed in the same way as in the past, and as shown in FIGS. 1(c) and 2. A waterproof layer 5 is formed over the entire upper surface of the metal roof body 10. The coating layer 3 and the top layer 4 may be applied using a construction tool such as a roller or a brush depending on the characteristics of the materials.

The heat insulating layer 2 may or may not be provided. When the heat insulating layer 2 is not provided, a primer layer to which the metal roof 1 and the coating layer 3 are attached is provided. The primer layer is applied by spraying or using the aforementioned application tool.

The waterproof layer 5 formed in this way is tightly adhered to areas other than the craft tape 11. The upper surface of the craft tape 11 overlaps the waterproof layer 5, but the craft tape 11 and the waterproof layer are not attached (adhesive or bonded).

Therefore, even if moisture enters between the waterproof layer 5 and the metal roof body 10 in the vicinity of the craft tape 11 and this moisture evaporates into water vapor, this water vapor or air containing water vapor will be transferred to the waterproof layer 5. and the craft tape 11, and diffuses in the longitudinal direction of the craft tape 11. Therefore, swelling of the waterproof layer 5 caused by expansion of water vapor in the vicinity of the craft tape 11 is prevented.

Furthermore, even if water enters between the waterproof layer 5 and the metal roof body or between the waterproof layer 5 and the sheet 12 at or near the mountain portion 1a, and this moisture evaporates to generate water vapor, this water vapor Alternatively, air containing water vapor flows into the space S and diffuses in the longitudinal direction of the mountain portion 1a. This prevents the waterproof layer 5 from swelling at or near the mountain portion 1a.

In the above embodiment, both the craft tape 11 and the sheet 12 are attached, but only one may be attached.

In the above embodiment, the craft tape 11 is used, but other tapes may be used in which one side has adhesion to the metal roof and the other side has no or almost no adhesion to the waterproof layer. Good too. Also, instead of pasting tape such as craft tape, it is also possible to use paint to form an intermediate layer that has the same properties as craft tape (adheres to the metal roof body but does not adhere to the waterproof layer). good.

However, since kraft tape has no or almost no adhesion to the waterproof layer on its synthetic resin laminate surface, and is inexpensive and easy to handle, it is preferable to form the intermediate layer with kraft tape. It is.

In the present invention, the configuration of the waterproof layer is not particularly limited, and is not limited to a generally used one having a heat insulating layer, a waterproof coat layer, and a protective top layer, and may also include a waterproof layer with another configuration. May be adopted. The material of the waterproof layer is also not particularly limited.

1, 10 Metal roof body 1a Mountain part 1b Valley part 1c Slanted wall part 1d Projection part 2 Heat insulation layer 3 Coat layer 4 Top layer 11 Craft tape 12 Sheet

Claims (12)

a metal roof body having peaks, valleys, and a sloped wall between the two;
A metal roof having a waterproof layer formed on the upper surface of the metal roof main body,
A metal roof characterized in that an intermediate layer is interposed between the valley part of the metal roof body and the waterproof layer, the intermediate layer being attached to the valley part and not attached to the waterproof layer. The metal roof according to claim 1, wherein the intermediate layer is a craft tape attached to the valley and extending in the longitudinal direction of the valley. The metal roof main body has a protrusion rising from the peak,
A sheet is attached between the protrusion and the upper part of the inclined wall, and a space is formed surrounded by the protrusion, the sheet, and the mountain,
3. The metal roof according to claim 1, wherein the waterproof layer is provided on the outer surface of the sheet. a metal roof body having a peak, a valley, a sloped wall between the two, and a protrusion rising from the peak;
A metal roof having a waterproof layer formed on the upper surface of the metal roof main body,
A space between the protrusion and the upper part of the inclined wall is covered with a sheet, and a space surrounded by the protrusion, the sheet, and the mountain is formed;
the sheet is butyl tape,
A metal roof characterized in that the waterproof layer is provided on the outer surface side of the sheet. 4. The metal roof according to claim 3, wherein the sheet has a base material made of synthetic resin or natural resin, and an adhesive applied to the base material. A metal roof according to claim 3 or 5, wherein the sheet is a butyl tape. In a metal roof waterproofing construction method in which a waterproof layer is formed on the upper surface of a metal roof body having peaks, valleys, and a sloped wall between the two,
Waterproofing construction of a metal roof characterized by forming the waterproof layer on the upper surface of the valley of the metal roof body, after forming an intermediate layer that adheres to the valley and does not adhere to the waterproof layer. Method. 8. The method for waterproofing a metal roof according to claim 7, wherein the intermediate layer is formed by applying a craft tape to the valley so as to extend in the longitudinal direction of the valley. The metal roof main body has a protrusion rising from the peak,
After covering the space between the protrusion and the upper part of the inclined wall with a sheet and forming a space surrounded by the protrusion, the sheet, and the peak,
The method for waterproofing a metal roof according to claim 7 or 8, characterized in that the waterproofing layer is formed. In a method for waterproofing a metal roof in which a waterproof layer is formed on the upper surface of a metal roof body having peaks, valleys, an inclined wall between the two, and a protrusion rising from the peaks,
A sheet made of butyl tape is pasted between the protrusion and the upper part of the inclined wall to form a space surrounded by the protrusion, the sheet made of butyl tape , and the peak, and then the waterproof layer is A waterproofing construction method for a metal roof, which is characterized by forming a metal roof. 10. The method for waterproofing a metal roof according to claim 9, wherein the sheet has a base material made of a synthetic resin or a natural resin, and an adhesive applied to the base material. The method for waterproofing a metal roof according to claim 9 or 11, wherein the sheet is a butyl tape.

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