JP7532711B2 - Method and structure for preventing roof tile fall and scattering - Google Patents

Description

Patent Law Article 30, paragraph 2 application Publication date July 10, 2020 Publication address https://www.youtube.com/ https://youtube.be/49kPtDNNZBI https://www.youtube.com/watch?v=49kPtDNNZBI&feature=youtube.be Publication date July 15, 2020 Publication address https://www.kawara-guard.jp/ https://www.kawara-guard.jp/service/ https://www. kawara-guard.jp/wp-content/themes/otaku-child/pdf/k-guard_20200707.pdf Publication date July 15, 2020 Publisher Roof Tile Guard Construction Method Association Publication name "Roof Tile NP Guard Construction Method" Construction Method Catalog

The present invention relates to a construction method for preventing tiles from falling or scattering from an existing tiled roof, and a structure constructed using this construction method.

In Japan, tiled roofs are widely used for buildings with sloping roof structures. Figure 7 shows a schematic diagram of a typical tiled roof structure. As shown in Figure 7, a tiled roof has multiple tile battens 2 extending horizontally at regular intervals on an underlayment 1, and is constructed using a "hook-batten tile roofing" method in which the convex parts on the backside of tiles 3 are hooked onto the tile battens 2. Two tiles overlap at most of the upper and lower edges, and three tiles overlap at the right and left ends of the upper and lower edges.
Since tiled roofs have the disadvantage of being vulnerable to strong winds caused by typhoons, tornadoes, etc., the Standard Design and Construction Guidelines for Tiled Roofs (Non-Patent Document 1) were formulated in 2001. In tiled roofs that comply with these guidelines, the tiles are connected to each other or to the tile battens with nails, screws, wires, etc.

Typhoon No. 15 in 2019 caused major damage, mainly in Chiba Prefecture, but on-site inspections revealed that while there was almost no damage in houses that had been constructed in accordance with the above guidelines, houses that did not follow the above guidelines suffered major damage, with not only roof tiles but also the roofs themselves being blown away (Non-Patent Document 2).

Since houses are used for a long time, there are many houses that are more than 20 years old. In addition, there are many houses built after 2001 that were not constructed according to the above guidelines.
As global warming progresses, it is expected that powerful typhoons will continue to approach the Japanese archipelago more frequently in the future, raising concerns about damage to tiled roofs in houses that have not been constructed in accordance with these guidelines. Because it costs a lot of money to replace non-compliant tiled roofs with structures that do, there is a demand for an inexpensive method of preventing tiles from falling or scattering that can withstand strong winds.

"Standard Design and Construction Guidelines for Tile Roofs" Published by: All Japan Roof Tile Works Federation, National Ceramic Tile Industry Association, National PC Roof Tile Association, published August 13, 2001, revised March 3, 2006 "Report on roof damage caused by Typhoon No. 15 of 2019" Joint investigation team of the All Japan Roof Tile Works Federation and the National Ceramic Roof Tile Industry Association, October 2019

The objective of this invention is to prevent tiles from falling or scattering from existing tiled roofs.

The means for solving the problems of the present invention are as follows.
1. A method for preventing roof tiles from falling or scattering, which includes a step of attaching asphalt tape in the vertical direction of an existing tiled roof to connect multiple consecutive tiles.
2. The method for preventing roof tiles from falling and scattering according to 1., characterized in that the asphalt tape is applied to the narrow surface of the roof tile crest.
3. A smoothing process in which a slope is formed using sealing resin on the steps between adjacent tiles in the vertical direction of the existing tiled roof.
the connecting step of attaching an asphalt tape so as to pass over the sealing resin;
3. The method for preventing roof tile falling and scattering according to 1. or 2.,
4. After the linking step,
A tile fixing process in which sealing resin is applied across the asphalt tape at the step between vertically adjacent tiles;
3. The method for preventing roof tile falling and scattering according to 1. or 2.,
5. A structure to prevent roof tiles from falling or scattering, characterized by having asphalt tape connecting multiple roof tiles connected vertically.

6. A step of drilling holes above the tile bars of at least the tiles located at both ends of the tiles connected by the asphalt tape;
a fixing step of fastening a screw into the hole to fix the asphalt tape to the tile batten;
The method for preventing roof tile fall and scattering according to any one of 1. to 4.,
7. The method for preventing roof tile falling and scattering according to 6., further comprising a step of injecting adhesive into the holes between the drilling step and the fixing step.
8. The method for preventing roof tile fall and scattering according to any one of 1. to 4., further comprising a sealing step of applying a sealing resin to the end of the asphalt tape and sealing the end with the sealing resin.
9. The sealing resin forms a slope on the step between vertically adjacent tiles.
A number of tiles are connected by asphalt tape that passes over the sealing resin,
Among the tiles connected by the asphalt tape, at least the tiles located at both ends have holes,
A structure to prevent tiles from falling and scattering, characterized in that the asphalt tape is fixed to the tile batten by screws fastened into the holes.
10. Asphalt tape that connects multiple tiles that are connected vertically;
A structure to prevent tiles from falling and scattering, characterized by having sealing resin piled across the asphalt tape at the step between vertically adjacent tiles.

The present invention can prevent tiles from falling and scattering on existing tiled roofs inexpensively and quickly. The present invention can prevent damage to tiled roofs during disasters such as earthquakes and strong winds, and can also prevent human and property damage caused by falling and scattering tiles. The tile falling and scattering prevention method of the present invention is a repair of existing tiled roofs, and does not require replacing tiles, so the amount of waste generated is extremely small. Asphalt tape has been used for waterproofing building roofs for over several decades, and is highly reliable, durable, and weather-resistant. By applying the asphalt tape to the narrow surface of the ridge of the tile, the asphalt tape is less likely to wrinkle when applied, and does not impede the flow of rainwater on the roof. By covering the asphalt tape with a top coat, the asphalt tape can be protected and the ends of the asphalt tape can be prevented from peeling off.

1 is a schematic diagram of a tiled roof having a structure for preventing tiles from falling and scattering, which is an example of the present invention. 1 is a partially enlarged view of a tiled roof having a structure for preventing tiles from falling and scattering, which is an example of the present invention. 1 is a cross-sectional view of a tiled roof having a structure for preventing tiles from falling and scattering, which is an example of the present invention. FIG. 2 is a diagram illustrating the steps of a method for preventing roof tile fall and scattering, which is a first embodiment of the present invention. FIG. 2 is a diagram illustrating the steps of a method for preventing roof tile fall and scattering, which is a first embodiment of the present invention. FIG. 2 is a diagram illustrating the steps of a method for preventing roof tile fall and scattering, which is a first embodiment of the present invention. Schematic diagram of a typical tiled roof structure. FIG. 2 is a diagram illustrating the steps of a method for preventing roof tile fall and scattering, which is a second embodiment of the present invention. FIG. 2 is a diagram illustrating the steps of a method for preventing roof tile fall and scattering, which is a second embodiment of the present invention. FIG. 2 is a diagram illustrating the steps of a method for preventing roof tile fall and scattering, which is a second embodiment of the present invention. FIG. 2 is a diagram illustrating the steps of a method for preventing roof tile fall and scattering, which is a second embodiment of the present invention.

- Structure to prevent tiles from falling and scattering The structure to prevent tiles from falling and scattering of the present invention has asphalt tape that connects multiple tiles that are consecutive in the vertical direction.
1 and 2 are a schematic diagram and a partially enlarged view, respectively, of a tiled roof having a structure for preventing tiles from falling and scattering, which is an example of the present invention, and FIG. 3 is a cross-sectional view taken along the line AA' in FIG.
One example of the present invention is a structure to prevent tiles from falling and scattering, which has sealing resin 4 that forms a slope on the step between vertically adjacent tiles 3, multiple tiles 3 are connected by asphalt tape 6 that passes over the sealing resin 4, and at least tiles 3A, 3B located at both ends of the tiles connected by the asphalt tape 6 have holes, and the asphalt tape 6 is fixed to the tile bars 2A, 2B by screws 8A, 8B that are tightened into these holes.
In one example of a structure to prevent roof tiles from falling and scattering, asphalt tape 6 is applied on top of primer 5 and is covered with top coat 7. Furthermore, adhesive 9 is poured into the holes, and the adhesive 9 flows out from the gaps when screws 8 are screwed in, bonding roof tiles 3A, 3C, and 3E together, and bonding tile 3E to tile crosspiece 2A.

- Method for preventing roof tile fall and scattering The method for preventing roof tile fall and scattering of the present invention is for constructing the structure for preventing roof tile fall and scattering of the present invention.

First Embodiment Hereinafter, a method for preventing roof tile fall and scattering, which is a first embodiment of the present invention, will be described in accordance with the order of steps for constructing the portion of the roof tile fall and scattering prevention structure shown in FIG. 2, which is one example of the structure described above.
"Smoothing process"
A slope is formed using sealing resin 4 at the step between tiles 3A and 3D that are vertically adjacent to each other on the existing tiled roof (Figure 4).
In the joining process described later, asphalt tape is applied on this sealing resin, and forming a slope on the step between the tiles makes it easier to apply the asphalt tape. In addition, since the sealing resin bonds adjacent tiles vertically, it is possible to prevent the tiles from lifting up due to earthquakes or strong winds, which would cause the asphalt tape to peel off. It is preferable that the sealing resin contains 5% or less by weight of plasticizer. If the plasticizer content is more than 5% by weight, the parts of the tiles where the plasticizer has soaked into them may discolor.
The sealing resin can be any resin that can be attached to roof tiles and hardened to form a slope, and commercially available resins can be used as appropriate. Examples of such resins include "Tile NP Seal" by the Roof Tile Guard Construction Association and "Stone Seal" by Cemedine Corporation.

"Connecting process"
Asphalt tape 6 is applied so as to pass over the sealing resin 4, and multiple continuous tiles 3A to 3B are connected (FIG. 5). Note that in this embodiment, a primer application process is performed before this connection process, in which a primer 5 is applied to the area where the asphalt tape 6 is to be applied.
There are no particular limitations on where the asphalt tape is applied, but it is preferable to apply it onto the crests of the tiles because this will not impede the flow of rainwater, and it is even more preferable to apply it onto the narrow surface of the crests of the tiles, as shown in Figure 1, because this reduces bending of the asphalt tape in the width direction and makes the asphalt tape less prone to wrinkling.

It is preferable to apply asphalt tape to all or every other row of tiles that run vertically. One end of the asphalt tape can also be applied to the crown tiles and oni tiles on the ridge, or it can be applied to tiles on another surface that cross the ridge.

Asphalt tape is a tape-like product with the same structure as asphalt sheets used in waterproofing work. Asphalt tape can be used in either a torch type, which is applied by heating with a flame, or a self-adhesive type with an adhesive layer, but it is preferable to use the self-adhesive type because it is safer and easier to apply because it does not use flames. The width of the asphalt tape is not particularly limited as long as it is equal to or less than the width of the tile, but in order to apply it to tiles having peaks and valleys without wrinkles, it is preferable that it is 8 cm or less, more preferably 6 cm or less, and even more preferably 5 cm or less. Furthermore, in order to apply it without wrinkles by following the unevenness, the thickness of the asphalt tape is preferably 1.4 mm or less, more preferably 1.2 mm or less, and even more preferably 1 mm or less. Asphalt tape, for example, "Tile NP Tape" by the Roof Tile Guard Construction Method Association and "Curtal Sheet SH-80 Anticorrosion" by Towa Kogyo Co., Ltd. can be suitably used. In addition, when applying a primer, you can use a product recommended by the manufacturer depending on the type of asphalt tape you are using. For example, the Roof Tile Guard Construction Association's "Tile NP Tape Primer" is a good choice.

Top coat application process
If necessary, a top coat 7 is applied to cover the asphalt tape 6 (FIG. 6). This top coat application process may be performed after the connecting process, and may also be performed after the drilling process, injection process, and fixing process described later. The top coat is applied so as to cover the asphalt tape, that is, over a wider area than the asphalt tape. Specifically, it is preferable to apply the top coat so that it protrudes 2 mm or more from the end of the asphalt tape. By covering the end of the asphalt tape with the top coat, it is possible to prevent the end of the asphalt tape from peeling off. The type of top coat can be a manufacturer's recommended product or the like depending on the type of asphalt tape used, but it is preferable that it is fluorine-based or acrylic silicone-based from the viewpoint of weather resistance. For example, when using the Roof Tile Guard Construction Method Association's "Tile NP Tape" as the asphalt tape, the Roof Tile Guard Construction Method Association's "Tile NP Top" or the like can be suitably used. In addition, it is preferable that the top coat is colored in the same color as the tile.

"Drilling process"
Among the tiles connected by the asphalt tape, holes are drilled above the tile bars of at least the tiles located at both ends. In this embodiment, the holes are drilled in the area where the three tiles 3A, 3C, and 3E overlap (FIG. 3). In this embodiment, the holes are drilled on the asphalt tape 6, but they can also be drilled in areas where the asphalt tape is not attached. In order to prevent vibration and noise during drilling and cracking of the tiles, it is preferable to use a non-vibration drill for drilling. In addition, a so-called two-stage drilling can be performed by drilling a shallow hole with a large diameter to accommodate the head of a screw or a decorative cap at the opening of the hole. After the drilling process, a cleaning process can be performed as necessary to blow off cutting chips with an air blower or the like.

Fixation process
The screw 8A is fastened into the hole to fix the asphalt tape 6 to the tile batten 2 (Figs. 2 and 3). When the hole is drilled on the asphalt tape as in this embodiment, it is preferable to fasten the screw via a washer or to use a screw with a flange. When the hole is drilled in a place where no asphalt tape is attached, the screw can be fastened via a metal plate that holds down the asphalt tape, and the asphalt tape can be indirectly fixed by the metal plate.
It is preferable to use a screw with a nominal diameter (outer diameter including the threads) larger than the diameter of the hole, since this allows the tiles with asphalt tape attached to be firmly fastened. It is also preferable that the screw is in the form of a "wood screw" with threads only on the tip of the shaft. By using a wood screw, the tip of the shaft with the threads is firmly fixed to the tile batten, and the tile corresponding to the part without threads on the head side of the shaft is pressed downward, allowing the tile to be firmly fastened.

"Injection process"
If necessary, an adhesive 9 can be injected into the hole between the drilling step and the fixing step. The type of adhesive is not particularly limited as long as it can bond the objects to be bonded according to the present invention, and epoxy adhesives, acrylic adhesives, silicone adhesives, urethane adhesives, polyester adhesives, etc. can be used. Among these, epoxy adhesives, silicone adhesives, and silylated acrylate adhesives are preferred in terms of weather resistance, durability, and adhesiveness. As the adhesive, a commercially available adhesive can be used as appropriate, and for example, "EP48" and "EXCEL I" from Cemedine Co., Ltd. can be used.

In summer, the temperature of roof tiles changes from nearly 70°C during the day to around 20°C at night. In order to prevent interface peeling and roof tile cracking due to shocks from earthquakes and expansion and contraction caused by temperature changes, it is preferable for the adhesive to be an elastic adhesive. It is preferable for the elastic adhesive to have the smaller of the elongation at break or the elongation at yield point of 20% or more, measured at a temperature of 23°C using a dumbbell-shaped No. 1 test piece with a thickness of 1 mm in accordance with JIS K6251.

In the present invention, the holes are not closed, and there is a gap between the tiles and between the lowest tile and the tile crosspiece. The adhesive preferably has a high viscosity so that it does not flow down the gap due to the slope of the roof. Specifically, the viscosity at 23°C and 20 rpm using a BH type viscometer (rotor No. 6) in accordance with JIS K6833-1 is preferably 1 Pa·s to 500 Pa·s, more preferably 10 Pa·s to 200 Pa·s. In addition, it is preferable for the adhesive to have thixotropy, since it has fluidity when injected and is less likely to flow out of the gap after injection. Specifically, it is preferable for the ratio of the viscosity at a rotation speed of 1 rpm to the viscosity at a rotation speed of 10 rpm (viscosity at 1 rpm/viscosity at 10 rpm) under the above conditions to be 2 or more.

By injecting adhesive into the hole, the gap between the screw and the hole is filled with adhesive, preventing rainwater and other water from seeping downward through the hole. Furthermore, the adhesive is pushed out by the screw and spreads around through the gap in the hole. This adhesive then bonds between the tiles and between the tiles and the tile battens, allowing the tiles to be fixed more firmly.

In addition, if necessary, a waterproofing process can be carried out, such as filling the holes with waterproof putty or covering the heads of the screws with waterproof putty, or a decorative process can be carried out in which a decorative cap is fitted if two-stage drilling is performed.

Second Embodiment Hereinafter, the method for preventing roof tile fall and scattering, which is the second embodiment of the present invention, will be described in order of steps.
"Primer process for resin"
A resin primer 10 is applied to the step between adjacent tiles in the vertical direction of an existing tiled roof (FIG. 8).
This step is optional and is carried out when the sealing resin used in the tile fixing step described later is incompatible with the tile to be installed. The resin primer can be selected according to the sealant to be used, and an example of the primer is the "tile NP seal primer" from the Roof Tile Guard Construction Method Association.
The resin primer is applied to both sides of the area where the asphalt tape will be applied in the joining process described below. Therefore, when applying asphalt tape to the narrow surface of the mountain part of the roof tile, it is applied not only to the step part but also to the finishing part where the tape will be applied. In addition, in FIG. 8, the discolored part of the roof tile is the part where the resin primer 10 has been applied, and it has been applied to the step part and the finishing part where the tape will be applied. Furthermore, when the end of the asphalt tape is sealed with sealing resin, the resin primer is also applied near the end of the asphalt tape.

"Connecting process"
Asphalt tape 6 is applied vertically to the existing tiled roof to connect multiple consecutive tiles (Figure 9). Note that a primer application process may be included before the connection process, in which a primer is applied to the areas where the asphalt tape 6 is to be applied.
The asphalt tape is applied along the steps between vertically adjacent tiles. It is preferable to apply the asphalt tape to all rows of tiles extending vertically, or to every other row. One end of the asphalt tape can also be applied to the crown tile or the oni tile of the ridge, or it can be applied to tiles on another surface across the ridge. It is preferable to apply the asphalt tape on the crest of the tile, and more preferably on the narrow surface of the crest of the tile. The asphalt tape can be the same as that described in the connection step of the first embodiment above.

"Tile fixing process"
At the step between vertically adjacent tiles, sealing resin 4 is applied so as to cover the asphalt tape 6, and the tiles are fixed in place (FIG. 10).
By piling sealing resin over the step to cover the asphalt tape, it is possible to prevent the tiles from moving due to earthquakes, strong winds, etc., and to prevent the asphalt tape from wrinkling or peeling off due to the tiles moving. In order to more firmly secure the tiles, it is preferable to pile the sealing resin thickly so as to form a slope on the step.
The sealing resin may be the same as that used in the smoothing step of the first embodiment.

"Sealing process"
Sealing resin 4 is applied to the ends of the asphalt tape, and the ends are sealed with the sealing resin (FIG. 11).
The tape can be fixed simply by sealing the ends with sealing resin, and there is no need to drill holes in the tiles as in the first embodiment, which reduces noise, vibration, and dust, and also enables lower costs and shorter construction times.

Top coat application process
If necessary, a top coat is applied to cover the asphalt tape 6. The top coat is also applied on the sealing resin 4 applied in the tile fixing process and the sealing process. This top coat application process may be performed after the tile fixing process, or it may be performed before the sealing process.
The top coat is applied so as to cover the asphalt tape, i.e., over a wider area than the asphalt tape. Specifically, the top coat is preferably applied so as to extend beyond the end of the asphalt tape by 2 mm or more. By covering the end of the asphalt tape with the top coat, peeling of the end of the asphalt tape can be prevented. The type of top coat can be a manufacturer's recommended product depending on the type of asphalt tape used, but it is preferable that it is fluorine-based or acrylic silicone-based from the viewpoint of weather resistance. In addition, it is preferable that the top coat is colored in the same color as the roof tile.

The above-mentioned tile fall/scattering prevention structure and tile fall/scattering prevention method are examples of the embodiment of the present invention, and the present invention is not limited to this embodiment. For example, the drilling process, fixing process, injection process, and sealing process may all be performed.

1 Underlayment material 2 Roof tile batten 3 Roof tile 4 Sealing resin 5 Primer 6 Asphalt tape 7 Top coat 8 Screw 9 Adhesive 10 Resin primer

Claims (3)

A connecting process in which asphalt tape is applied vertically to the existing tiled roof to connect multiple consecutive tiles .
After the connecting step, a tile fixing step is performed in which a sealing resin is applied across the asphalt tape at the step between vertically adjacent tiles;
A method for preventing roof tiles from falling and scattering, comprising: The method for preventing roof tiles from falling and scattering described in claim 1, characterized in that the asphalt tape is applied to the narrow surface of the roof tiles' crests. Asphalt tape that connects multiple tiles in a vertical direction ;
A structure to prevent tiles from falling and scattering, characterized in that sealing resin is piled across the asphalt tape at the step between vertically adjacent tiles .

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