Installation method for scrap board and around window

Abstract

To solve the problem that, when using metal siding as an exterior material for construction around windows in buildings, it is said to be difficult to apply sealant as a finishing touch, and even when it is possible to apply sealant, there is a risk that cracks will appear due to deterioration of the sealant, allowing rainwater to seep into the frame.SOLUTION: The present invention provides a construction method for scrap boards and around windows, which uses a scrap board 1 that is approximately L-shaped in cross section and provided with a fixed surface 2 that comes into contact with the building frame and a rising surface 3 formed by bending one end of the fixed surface 2 approximately vertically, with a plurality of convex portions and folded-back pieces 6 on the fixed surface 2 and a water-stopping surface 7 formed by folding back the end of the rising surface 3. The method also uses water-stopping packing in the corners around windows, ensuring sufficient watertightness even when metal siding is used as the exterior material, and ensuring a drainage route in the unlikely event that rainwater does seep in.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a backsplash board for preventing the infiltration of rainwater and the like around windows, and to a method for installing the backsplash board. [Background technology]

[0002] A variety of exterior materials are used for the exterior walls of buildings, including ceramic siding, metal siding, and ALC (Autoclaved Light Aerated Concrete). There are various construction methods depending on the building material, but high watertightness is required for openings, especially around windows. Technologies that ensure watertightness are described, for example, in Patent Documents 1 and 2 below. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-65479 [Patent Document 2] Japanese Patent Publication No. 2022-30368 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 describes a water-stopping member having a main body and a sealing member, and a method for installing exterior materials using this water-stopping member. Generally, holes are created in the parts where the member is fixed with fasteners, which allow rainwater and other elements to easily seep in. Unless some kind of watertight measure is taken, there is a risk that rainwater and other elements will seep into the building's framework through gaps in the fasteners. Furthermore, Patent Document 1 does not specify the drainage route in the unlikely event that rainwater does seep in, so there is room for improvement.

[0005] In particular, when metal siding is used as an exterior material, rigid urethane foam or similar is often used as the core material, which is said to be difficult to adhere to with sealant. When installing around sashes, metal siding exposes this core material at the edges, making it difficult to apply sealant between the edge of the exterior material and the waterproofing material. Even if installation was possible, there was a risk that cracks would appear due to deterioration of the sealant, allowing rainwater to seep into the main body. On the other hand, ceramic siding has good adhesion to the sealant even at the edges, making it possible to install a method known as two-sided sealing, in which sealant is applied directly between the exterior material and the waterproofing material.

[0006] Patent Document 2 describes a drainage member that is used at the left and right lower ends of an opening and has a first flow path and a second flow path, and describes a structure that allows rainwater or the like to be smoothly discharged along the drainage flow path even if it happens to get inside the joint structure. However, when exposed to heavy rain and wind, rainwater will blow up, and especially at the four corners of the opening (window), rainwater or the like will be more likely to seep further to the back side (the body side), so it may be necessary to ensure even greater watertightness. [Means for solving the problem]

[0007] Therefore, the present invention provides a scrap board to be used around the windows of a building, which is an approximately L-shaped scrap board in cross section and consists of a fixed surface that contacts the building's frame and a raised surface that is bent approximately vertically at one end of the fixed surface, and further has one or more convex portions on the fixed surface, a folded piece on the end of the fixed surface, and a water-stopping surface that is folded back at the end of the raised surface.

[0008] The construction method for around windows also includes a process in which, after installing furring strips, a roughly L-shaped cross-section of scrap boards is attached to all sides of the window, the scrap board installed on the roof side in particular is watertightly treated, and roughly triangular waterproof packing is installed at the corners of the window.Furthermore, after installing the exterior material, the exterior material and the window area are watertightly sealed, and the base side is provided with multiple areas that are not sealed or with drainage holes using drainage pipes, etc. [Effects of the Invention]

[0009] According to the present invention, the construction method for openings, particularly around windows, can be simplified, and sufficient watertightness and drainage mechanisms can be ensured even when metal siding is used as the exterior material. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a side view of a scrap board according to the present invention. [Figure 2] FIG. 2 is a perspective view of a scrap board according to the present invention. [Figure 3] FIG. 10 is a completed construction diagram showing an example of a window area using a scrap board according to the present invention. [Figure 4] FIG. 1 is a cross-sectional view showing an embodiment of a window area located on the roof side that uses a scrap board according to the present invention. [Figure 5] FIG. 10 is an explanatory diagram showing the construction of furring strips when using a scrap board according to the present invention. [Figure 6] 1 is an explanatory diagram of a method for installing a scrap board according to the present invention. FIG. [Figure 7] 10A and 10B are explanatory diagrams showing a processing method when using a waste board according to the present invention. [Figure 8] FIG. 10 is an explanatory diagram showing the watertight treatment on the roof side when using a scrap board according to the present invention. [Figure 9] FIG. 10 is an explanatory diagram of a drainage path of the waste board according to the present invention. [Figure 10] 10 is an explanatory diagram showing the construction of a waterproof gasket when using a discarding board according to the present invention. FIG. [Figure 11] FIG. 10 is an explanatory diagram showing the installation position of a waterproof gasket when using a discarding board according to the present invention. [Figure 12] 10 is an explanatory diagram showing the construction of a temporary sealing when using a temporary board according to the present invention. FIG. [Figure 13] FIG. 10 is an explanatory diagram showing the installation position of the temporary sealing when using the temporary board according to the present invention. [Figure 14] FIG. 10 is an explanatory diagram of the application of exterior materials when using a waste board according to the present invention. [Figure 15] 10 is an explanatory diagram of drainage holes when using a waste board according to the present invention. FIG. [Figure 16] FIG. 10 is a construction completion diagram showing another embodiment of a construction method. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0011] An embodiment of a scrap board 1 according to the present invention will be described in detail below with reference to the drawings. In the description of the drawings, identical elements are designated by the same reference numerals, and redundant explanations will be omitted. FIG. 1(a) is a side view of a scrap board 1 according to the present invention, and FIG. 1(b) is a side view of a scrap board 1 according to the present invention with a gasket 8 attached. FIG. 2 is a perspective view of a scrap board 1 according to the present invention. FIG. 3 is a diagram showing the completed construction of an embodiment of a window surrounding structure using a scrap board 1 according to the present invention. FIG. 4 is a cross-sectional view showing an embodiment of a window surrounding structure located on the roof side using a scrap board 1 according to the present invention. FIG. 5 is an explanatory diagram of the construction of furring strips 44 when using a scrap board 1 according to the present invention. FIG. 6 is an explanatory diagram of the construction method of a scrap board 1 according to the present invention. FIG. 7 is an explanatory diagram showing a processing method when using a scrap board 1 according to the present invention. FIG. 8 is an explanatory diagram showing the watertight treatment on the roof side when using a scrap board 1 according to the present invention. FIG. 9 is an explanatory diagram of drainage paths 91 and 92 of a scrap board 1 according to the present invention. FIG. 10 is an explanatory diagram of the construction of a waterproof gasket 101 when using a scrap board 1 according to the present invention. Fig. 11 is an explanatory diagram regarding the installation position of waterproof gasket 101 when using a scrap board 1 according to the present invention. Fig. 12 is an explanatory diagram regarding the installation of a scrap sealant 121 when using a scrap board 1 according to the present invention. Fig. 13 is an explanatory diagram regarding the installation position of a scrap sealant 121 when using a scrap board 1 according to the present invention. Fig. 14 is an explanatory diagram regarding the installation of exterior material 31 when using a scrap board 1 according to the present invention. Fig. 15 is an explanatory diagram regarding drainage holes 151 when using a scrap board 1 according to the present invention. Fig. 16 is a completed installation diagram showing one embodiment of another installation method.

[0012] 1(a) and 2 are cross-sectional views of a scrap board 1 according to the present invention, which is a generally L-shaped member in cross section, consisting of a fixed surface 2 and a raised surface 3 formed by bending the end of the fixed surface 2 approximately perpendicularly. More specifically, the fixed surface 2 is provided with a first convex portion 4 and a second convex portion 5, a folded piece 6 formed by folding back the end of the fixed surface on the side of the first convex portion 4, and a water-stopping surface 7 folded back further outward at the end of the raised surface 3. The angle between the fixed surface 2 and the raised surface 3 is preferably approximately 90 to 120 degrees. The scrap board 1 is made of a metal plate such as aluminum, iron, copper, stainless steel, titanium, or aluminum-zinc alloy-plated steel, and is formed by molding, extrusion, or the like.

[0013] Figure 1(b) shows an embodiment in which a packing 8 is provided on the water-stopping surface 7 of the scrap board 1 according to the present invention. By providing the packing 8 at this position, high water-tightness can be ensured. In addition, although two protrusions are provided in the example disclosed in Figure 1, there is no limit to the number of protrusions as long as there is at least one. The packing 8 may be a commercially available material such as ethylene propylene rubber (EPDM).

[0014] FIG. 3 shows the completed construction of the area around a window when using a scrap board 1, and is composed of an exterior material 31, a sash 32 which is the window frame, window glass 33, and a window frame 34. The exterior material 31 can be made of metal siding, ceramic siding, ALC (Autoclaved Light Aerated Concrete), etc., but the examples in this disclosure will be described assuming the use of metal siding. The sash 32 is used for, for example, fixed windows, single-hung windows, double-hung windows, sliding windows, etc., and is made of aluminum, resin, etc. Window glass 33 is attached to the inside, creating a structure that allows the opening of the building to be opened and closed.

[0015] Figure 16 shows the completed construction when a component called a stopper 162 is used around the window. The window is constructed with the stopper 162, corner component 163, and sealing 164, surrounding the window frame 161. When these components are used, an additional frame is provided around the window. While this frame can be used to enhance the design of the window, using a scrap board 1 or the like can give the building a neater impression as a whole.

[0016] The method of installing the scrap board 1 according to the present invention will be explained starting from Figure 4. Figure 4 shows a cross section of the area around a window on the roof side, in which a double-sided waterproof sheet 42 and a breathable waterproof sheet 43 are installed on a body 41, and furring strips 44 are installed around the window as shown in Figure 5.

[0017] Figure 6 shows how to install scrap boards 1 on the four sides of a rectangular window, and it is preferable to use one scrap board 1 per side. In particular, the scrap board 1 installed horizontally on the roof side should be installed as a single seamless scrap board 1 to ensure watertightness. The remaining three sides can also be connected to fit the size of the window. Furthermore, the scrap board 1 must be processed before installation. As shown in Figure 7, the surface consisting of the raised surface 3, water-stopping surface 7, and packing 8 of the scrap board 1 is cut out approximately 50 mm from the end to create a notch 61. This processing must be performed on both ends of the scrap board 1.

[0018] Next, the installation procedure for the backsplash board 1 will be explained. The order in which the backsplash board 1 is installed is from the bottom up, starting with the base side, then the left and right sides, and finally the roof side, in order to form a drainage path. Taking the example of a backsplash board 1 installed horizontally on the roof side, as shown in Figure 4, the gasket 8 is pressed against the sash 32 and installed with a fastener 45. The fastener 45 is preferably used between the first protrusion 4 and the folded piece 6 of the backsplash board 1. In the example of the present disclosure, the first protrusion 4 also serves as a guideline for where to use the fastener 45. Therefore, by providing multiple protrusions, it is possible to reduce the effort required during installation. The other three sides are similarly installed by pressing the gasket 8 against the respective sashes.

[0019] After installing the backing board 1, as shown in Figures 4 and 8, single-sided waterproof tape 46 is installed on the roof side of the backing board 1 from a position that covers the fasteners 45 toward the roof side, covering the furring strips. The length of the single-sided waterproof tape 46 is preferably long enough to connect the breathable waterproof sheet 43 and the backing board 1. The single-sided waterproof tape 46 may be a commercially available tape such as a butyl-based tape.

[0020] Figure 9 shows an enlarged view of the corner after the backsplash 1 has been installed. The backsplash 1 is installed from the base toward the roof, so as shown in Figure 9, the left and right backsplash 1 overlap the backsplash 1 on the base side, and then the backsplash 1 on the roof side overlaps. Applying backsplash sealant 62 to the overlapping areas further enhances watertightness. This overlap ensures that if a crack develops due to deterioration of the finish sealant 141 (shown in Figure 14) and rainwater or other substances penetrates, the water-stopping surface 7 (packing 8) first prevents rainwater from entering the frame. Rainwater that penetrates from the sash 32 down the raised surface 3 to the fixed surface 2 can be drained to the outside via the drainage path 91 formed between the raised surface 3 and the second protrusion 5. Rainwater or other substances that rise up around the window due to pressure may overflow the second protrusion 5 and further penetrate. In this case, the space formed by the second convex portion 5 and the first convex portion 4 can function as the second drainage path 92. If the backing board 1 is fixed with the fasteners 45, holes will be created at the fixed points, increasing the risk of water leakage to the building structure (indoor side) compared to other locations. Therefore, the two-stage drainage path described above makes it possible to ensure high watertightness.

[0021] Figure 10 is an explanatory diagram of installing a waterproof gasket 101 in the corners around a window. The waterproof gasket 101 is roughly triangular in shape, and is preferably a right-angled isosceles triangle to match the structure around the window. The waterproof gasket 101 is installed by adhesively fixing it to the corners as shown in Figure 10. The aforementioned temporary sealant 62 can be used for this adhesive. After installation, it will look like Figure 11, which improves the watertightness of the corners.

[0022] 12 and 13 are explanatory diagrams of the position where temporary sealant 121 is applied to the base-side scrap board 1. After installing the waterproof packing 101, the temporary sealant 121 is applied between the raised surface 3 and the second convex portion 5 of the scrap board 1 on the lower (base) side of the window surround. The sealing position is preferably the position where the back surface material 144 of the exterior material 31 comes into contact with the cut surface 132 of the exterior material, as shown in FIG. 13. The temporary sealants used in the installation are caulking materials made from silicone, modified silicone, polyurethane, etc.

[0023] Figure 14 is an explanatory diagram of the exterior material 31 after installation. The exterior material 31 installed around the window is fastened in several places with fasteners 142 as shown in Figures 14 and 15, and a finishing sealant 141 is installed in the gaps between the exterior material 31 installed on the left and right sides of the window and the sash 32 on the roof side. The finishing sealant 141 is also installed in the gap on the base side, but drainage holes 151 must be created to drain rainwater and other water from the drainage path 91. For this reason, it is necessary to leave several areas, approximately 10 to 20 millimeters wide, where the finishing sealant 141 is not installed. The finishing sealant 141 is made of the same material as each temporary sealant. The drainage holes 151 may be replaced with cylindrical or rectangular pillar-shaped drainage members, as shown in Figure 13.

[0024] The exterior material 31 in the example of the present disclosure is composed of a surface material 143, a back surface material 144, and a core material 145. The surface material 143 is mainly made of a metal steel plate, the back surface material 144 is made of metallized paper or the like, and the core material 145 is made of a synthetic resin foam such as rigid urethane foam or polyisocyanurate foam.

[0025] Because it is difficult to bond the core material 145 and each sealant of the present disclosure, it is not possible to seal between the cut surface and the sash, as is the case with ceramic siding. Therefore, when using metal siding for the exterior material 31, it is necessary to install it so that the scrap board 1 and the backing material 144, or the sash 131 and the surface material 143, are in contact, as with the scrap sealant 121 and the finishing sealant 141.

[0026] The present disclosure is not limited to the above-described embodiment, and modifications, improvements, etc. are included in the present invention. For example, the waterproof gasket 101 may be used only in two locations around the bottom edge (sill side) of the window, or a gasket or the like may be provided as a third convex portion on the backing board 1, or only the first convex portion may be used. The present disclosure is not limited to the above-described embodiment, as long as a sufficient drainage path can be ensured even if a crack occurs in the finishing sealant 141. [Explanation of symbols]

[0027] 1. Scrapboard 2 Fixed surface 3. Raised surface 4 First convex part 5 Second convex part 6 Folding piece 7 Water stop surface 8. Packing 31 Exterior materials 32 Sash 33 Window Glass 34 Window Frame 41 Body 42 Double-sided waterproof sheet 43 Breathable waterproof sheet 44 Fuselage 45 Fixtures 46 Single-sided waterproof tape 47 Ceiling 61 Notch 62 Disposable sealing 91 Drainage route 92 Second drainage route 101 Watertight packing 121 Disposable sealing 131 Sash 132 Cutting surface of exterior material 141 Finishing Sealing 142 Fixtures 143 Surface material 144 Backing material 145 Core material 151 Drain hole 161 Window Frame 162 Tonge 163 Corner parts 164 Ceiling

Claims

1. A fixed surface that comes into contact with the building's frame, a throw-away plate having a substantially L-shaped cross section, the throw-away plate being configured with a rising surface formed by bending one end of the fixing surface substantially vertically; The fixing surface is provided with one or more protrusions, and a folded piece is further provided at the end portion, The raised surface is provided with a water-stopping surface with a folded end. Scrapboard used around windows in buildings.

2. In the structure around the window, after installing the furring strip, A method for installing exterior materials by attaching the scrap board according to claim 1, The process of attaching a scrap board; and a step of applying watertight treatment to the roof-side scrap board, and a process of installing waterproof packing at the corners around the windows. After the exterior materials are installed, the exterior materials and windows are sealed to make them watertight. This is a construction method for around windows that also includes a process of creating drainage holes in multiple places on the base side.

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