JP7715892B2 - Mounting structure, mounting method and base unit for building attachments - Google Patents

Description

The present invention relates to a mounting structure, mounting method, and base unit for attaching building accessories such as shutters, louvers, and lattices to a building frame.

Conventionally, there is known an attachment structure in which louvers, which are building accessories placed on the exterior side of fittings such as terrace windows, are attached to the building frame of a detached house or the like (see Patent Document 1). The building frame comprises a building wall, an exterior wall material and a waterproof layer installed along the building wall, with the waterproof layer located inside the room relative to the exterior wall material. The upper frame of the louver is fixed to the building wall with screws that penetrate the exterior wall material, and the lower frame of the louver is fixed to the building wall with screws that penetrate the waterproof layer.

JP 2016-151154 A

However, with the mounting structure described in Patent Document 1, the screws that secure the louver's lower frame to the building frame penetrate the waterproof layer, creating holes in the waterproof layer that connect the outdoor space to the building wall, posing a risk of water leakage through these holes. Therefore, it is necessary to apply a waterproofing treatment to these holes.

The object of the present invention is to provide a mounting structure, mounting method, and base unit for building attachments that can maintain watertightness without forming holes in the waterproofing layer.

The mounting structure for a building attachment of the present invention is a mounting structure for mounting a building attachment to a building frame having an opening in which fittings are to be installed, wherein the exterior wall surface of the building frame is composed of an exterior wall material and a waterproofing layer that is lower than the exterior wall material and has a projected position on the indoor side, and an upper frame base material, a lower frame base material, and left and right vertical frame base materials are attached to the building attachment, and the upper frame base material, the lower frame base material, and the left and right vertical frame base materials are framed to form a base frame, and the upper frame base material and the left and right vertical frame base materials are fixed to the building frame facing the outdoor side of the exterior wall material, and the lower frame base material is not attached to the waterproofing layer and is positioned facing the waterproofing layer at a distance on the outdoor side.
The base unit of the present invention is characterized in that it is composed of a gap-concealing member used in the mounting structure of the building attachment of the present invention, which seals the gap between the fixture or the waterproofing layer, and a lower frame base material to which the gap-concealing member is attached.
The method for installing a building attachment of the present invention is a method for installing a building attachment that constitutes a mounting structure for a building attachment of the present invention, characterized in that the upper frame base material and left and right vertical frame base materials of the base frame used in the mounting structure for the building attachment are fixed to the building body in a state of abutment along the exterior wall material that constitutes the exterior wall surface of the building body, the lower frame base material is not attached to a waterproofing layer that constitutes the exterior wall surface of the building body and whose projected position is closer to the interior than the exterior wall material, but is positioned facing the exterior side of the waterproofing layer, and the building attachment is attached to the upper frame base material, the lower frame base material, and the left and right vertical frame base materials.

The present invention provides a mounting structure, mounting method, and base unit for building attachments that can maintain watertightness without forming holes in the waterproof layer.

1 is an external view showing a louver attached to a building frame using an attachment structure according to an embodiment of the present invention; FIG. 2 is a vertical cross-sectional view showing the mounting structure according to the embodiment. FIG. 3 is a vertical cross-sectional view showing a lower portion of the mounting structure according to the embodiment. FIG. 4 is a cross-sectional view taken along line IV-IV shown in FIG. FIG. 2 is a cross-sectional view taken along line VV shown in FIG. FIG. 4 is a perspective view showing a corner of the mounting structure according to the embodiment. 4A to 4C are explanatory views relating to assembly of the mounting structure according to the embodiment.

[Configuration of this embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 5, a shutter 1 as a building accessory is an exterior fixture that is placed on the outdoor side of a sliding window 4 (terrace window) that is a fixture on a balcony 3 of a building frame 2 of a detached house or the like.
In the following description, the left-right direction of the shutter 1 is the X-axis direction, the up-down direction of the shutter 1 is the Y-axis direction, and the projection direction of the shutter 1 is the Z-axis direction. The X, Y, and Z-axis directions are perpendicular to each other.

The building skeleton 2 has building walls that form the opening 5, consisting of an upper wall 21, a lower wall 22, and left and right side wall sections 23. An exterior wall material 25 (siding) is provided on the outdoor side of the upper wall section 21 and the left and right side wall sections 23, with a base board 24 running along the building wall section. An FRP waterproof layer 26 is provided on the outdoor side of the lower wall section 22 and the lower parts of the left and right side wall sections 23, with the base board 24 interposed therebetween. The FRP waterproof layer 26 is formed by impregnating glass fiber (reinforcing material) with resin and then curing it. It is provided so as to continuously cover the lower wall section 22 and the floor substrate of the balcony 3, and is exposed to the outdoor side. The exterior wall material 25 is installed above the FRP waterproof layer 26.
The exterior surfaces of the base boards 24 attached to the upper wall portion 21, the lower wall portion 22, and the left and right side wall portions 23 are flush with each other. The FRP waterproof layer 26 (waterproof layer, sheet) attached to the base boards 24 is thinner than the exterior wall material 25, so the exterior surface 261 of the FRP waterproof layer 26 (the exterior wall surface of the lower wall portion 22) is positioned at a position that is recessed toward the interior of the room from the exterior surfaces 251 of the exterior wall material 25 (the exterior wall surfaces of the upper wall portion 21 and the left and right side wall portions 23).

The sliding window 4 is constructed using a commonly known method and is provided in the opening 5.
The shutter 1 comprises a frame body 10 and a shutter device 15 attached to the frame body 10. As shown in Figures 1 and 2, the frame body 10 comprises an upper frame 11, a lower frame 12, and left and right vertical frames 13 formed from extruded aluminum, and a shutter curtain 16 (described later) is fitted into the left and right vertical frames 13 so as to be movable up and down in the Y-axis direction. As shown in Figure 2, the shutter device 15 comprises the shutter curtain 16 formed by connecting a plurality of slats 161 so as to be rotatable with each other, a shutter winding shaft 17 capable of winding up and unwinding the shutter curtain 16, a motor (not shown) that drives the shutter winding shaft 17, and a shutter case 18 that houses the shutter winding shaft 17 and the motor and is attached to the left and right vertical frames 13.

As shown in Figure 2, the upper frame base material 34 is attached to the shutter case 18 along the X-axis direction. The upper frame base material 34 is formed from a hollow extruded aluminum profile having indoor and outdoor visible surfaces 341, 342, upper and lower visible surfaces 343, 344, and a continuous piece 345 that connects the visible surfaces 341, 342 between the visible surfaces 343, 344. A recessed step 347 is formed on the inside of the upper frame base material 34 at the connecting portion between the indoor visible surface 342 and the upper visible surface 343. The outdoor visible surface 341 of this upper frame base material 34 is screwed to the shutter case 18 with screws 6, and the indoor visible surface 342 is positioned facing the exterior of the exterior wall material 25 and is screwed to the upper wall portion 21 via the exterior wall material 25 and base board 24 with fixing screws 7. A sealing material 348 is provided between the step portion 347 and the exterior wall material 25.

As shown in Figure 2, the upper frame base material 31 is attached to the upper frame 11 along the X-axis direction. The upper frame base material 31 is formed of a hollow aluminum extrusion with indoor and outdoor facing surfaces 311, 312 and upper and lower facing surfaces 313, 314. The outdoor facing surface 311 has a bent portion 315 that bends toward the room, so that the upper portion of the bent portion 315 is positioned closer to the room than the lower portion. The outdoor facing surface 311 of this upper frame base material 31 is positioned facing the exterior of the exterior wall material 25 and is screwed to the upper frame 11 with screws 6, and the indoor facing surface 312 is screwed to the upper wall portion 21 via the exterior wall material 25 and base board 24 with fixing screws 7.

As shown in Figure 3, the lower frame 12 is attached to a lower frame base material 32 along the X-axis. The lower frame base material 32 is a hollow extruded aluminum member with indoor and outdoor visible surfaces 321, 322, upper and lower visible surfaces 323, 324, and a continuous piece 325 that connects the visible surfaces 321, 322 between the visible surfaces 323, 324. The outdoor visible surface 321 is formed with a protruding piece 326 that is positioned in a groove engaged with the lower interior surface of the lower frame 12. The protruding piece 326 protrudes from the visible surface 321 to the exterior and is raised diagonally upward. A recessed step 327 is formed on the inside of the lower frame base material 32 where the indoor visible surface 322 and the lower visible surface 324 join. The lower frame base material 32 is disposed below the lower frame 12, facing the FRP waterproofing layer 26 at a distance on the outdoor side, and the outdoor facing surface 321 is screwed to the lower frame 12 with screws 6. On the other hand, a gap concealing member 35 made of extruded aluminum is screwed to the indoor facing surface 322 with screws 8.
The gap concealing member 35 is disposed extending in the X-axis direction along the soffit base material 32. As shown in FIG. 3 , it has an L-shaped cross section and includes an attachment piece 351 extending along the Y-axis direction and a gap concealing piece 352 extending along the Z-axis direction. The exterior surface of the attachment piece 351 abuts against the interior surface of the visible surface 322. Multiple vertically aligned grooves 353 are formed on the interior surface of the attachment piece 351, extending along the longitudinal direction of the gap concealing member 35. The multiple grooves 353 can be used as markers for positioning the attachment piece 351 when screwing it to the soffit base material 32. The gap concealing piece 352 is disposed extending from the attachment piece 351 toward the interior of the room when the attachment piece 351 is screwed to the soffit base material 32, and faces the window soffit 42 of the sliding window 4 in the Y-axis direction. An elastic abutment 354 such as a sponge or gasket is provided on the gap concealing piece 352 along the longitudinal direction of the gap concealing piece 352. The elastic abutment 354 is in pressure contact with the window lower frame 42, thereby sealing the gap between the gap concealing piece 352 and the window lower frame 42 and suppressing light leakage.

As shown in FIG. 4 , the left and right vertical frames 13 are attached to left and right vertical frame base members 33 along the Y-axis. The left and right vertical frame base members 33 are hollow extruded aluminum members having interior and exterior facing surfaces 331, 332 and interior and exterior facing surfaces 333, 334. A recessed step 337 is formed on the inside of the vertical frame base member 33 where the interior facing surface 332 and the exterior facing surface 334 join. The left and right vertical frame base members 33 are positioned closer to the exterior of the left and right vertical frames 13 than the left and right vertical frames 13. The exterior facing surface 331 (excluding the lower portion of the vertical frame base member 33, described below) faces the exterior side of the exterior wall material 25 and is screwed to the left and right vertical frames 13 with screws 6. The interior facing surface 332 is screwed to the left and right side wall members 23 via the exterior wall material 25 and furring boards 24 with fixing screws 7. A seal material 338 is provided between the step portion 337 and the exterior wall material 25 .
As shown in Figure 5, at the lower portions of the left and right vertical frame base materials 33 that face the FRP waterproofing membrane 26 across a gap in the Z-axis direction, the interior-facing visible surface portion 332 is not screwed to the side wall portion 23, but a gap concealing member 35 is attached. The gap concealing member 35 is configured in the same way as that attached to the sill 12 and is arranged in the Y-axis direction along the aforementioned lower portion of the vertical frame base material 33. The mounting piece portion 351 is screwed to the visible surface portion 332 with the screw 8, and the gap concealing piece 352 is arranged in a direction extending from the mounting piece portion 351 toward the interior and faces the vertical window frame 43 of the sliding window 4 in the X-axis direction. The elastic abutment 354 provided on the gap concealing piece 352 is in pressure contact with the vertical window frame 43, thereby sealing the gap between the gap concealing piece 352 and the vertical window frame 43 and suppressing light leakage.

Screw holes 36 are formed in the upper frame base materials 31, 34 and the lower frame base material 32 along the X-axis direction, and the screw holes 36 are used to vertically fasten the upper and lower frame base materials 31, 34, the lower frame base material 32, and the left and right vertical frame base materials 33. In this embodiment, the base frame is made up of the upper frame base materials 31, 34, the lower frame base material 32, and the left and right vertical frame base materials 33. Furthermore, the base unit 37 shown in FIG. 7(A) is formed by attaching the gap concealing member 35 to the lower frame base material 32, and the base unit 38 shown in FIG. 7(B) is formed by attaching the gap concealing member 35 to the vertical frame base material 33. At the corners where the lower frame base material 32 and the vertical frame base material 33 are connected, as shown in FIG. 6, the elastic abutment 354 installed on the lower frame base material 32 presses against the elastic abutment 354 installed on the vertical frame base material 33, thereby suppressing light leakage around the corners.

The assembly of the mounting structure for the shutter 1 will be described below.
First, the upper frame base materials 31, 34, the lower frame base material 32, and the left and right vertical frame base materials 33 are framed vertically to form the base frame.
Next, the gap concealing members 35 are attached to the lower frame base material 32. After that, the gap concealing members 35 are attached to the lower parts of the left and right vertical frame base materials 33. At this time, the elastic abutments 354 of the gap concealing members 35 on the vertical frame base material 33 side are pressed against the elastic abutments 354 of the gap concealing members 35 on the lower frame base material 32 side. This causes the elastic abutments 354 of the gap concealing members 35 of the lower frame base material 32 and the vertical frame base material 33 to come into pressure contact with each other, and they are in close contact with each other to the extent that no light leakage occurs.
Next, this base frame is fixed to the building skeleton 2. Specifically, temporary screws are driven into the building skeleton 2, and the base frame is hooked onto the temporary screws to temporarily position it. At this time, the elastic abutments 354 of the gap concealing members 35 attached to the soffit base material 32 are pressed against the window soffit 42 of the sliding window 4, and the elastic abutments 354 of the gap concealing members 35 attached to the left and right vertical frame base materials 33 are pressed against the window vertical frames 43 of the sliding window 4. This closes the gap between the sliding window 4 and the lower part of the soffit base material 32 and the vertical frame base material 33. After this temporary positioning, while the upper frame base materials 31, 34 and the vertical frame base material 33 (excluding the lower part) remain in contact with the exterior wall material 25, fixing screws 7 are inserted through the exterior wall material 25 and the furring board 24 and screwed to the building wall (permanently fixed).
Finally, the shutter 1 is attached. Specifically, the shutter case 18 is screwed to the upper frame base material 34 with the screws 6, the upper frame 11 is screwed to the upper frame base material 31 with the screws 6, the lower frame 12 is screwed to the lower frame base material 32 with the screws 6, and the left and right vertical frames 13 are screwed to the left and right vertical frame base materials 33 with the screws 6.
In this way, the mounting structure of the shutter 1 to the building frame 2 in which the sliding window 4 is installed is formed.

[Modification]
In the above embodiment, the gap concealing member 35 is formed in an L-shaped cross section, but it may also have various other shapes such as a T-shaped cross section, a Z-shaped cross section, an I-shaped cross section, a U-shaped cross section, or a square-shaped cross section.
In the above embodiment, the gap concealing member 35 is attached to both the lower frame base material 32 and the lower part of the vertical frame base material 33, but if there is no need to suppress light leakage between the shutter 1 and the sliding window 4 or if the level of suppression is low, it may be attached to only one of the above, or not to both.
In the above embodiment, the elastic abutments 354 of the gap concealing members 35 attached to both the lower frame base material 32 and the lower part of the vertical frame base material 33 are pressed together to suppress light leakage from between them, but if there is no need to suppress this light leakage or if the level of suppression is low, the elastic abutments 354 may be positioned at a distance from each other.
In the above embodiment, the upper frame base materials 31, 34 and the left and right vertical frame base materials 33 (excluding the lower parts) are fixed to the building structure 2 in abutting contact along the exterior wall material 25, but spacers or the like may be interposed between them and the exterior wall material 25.
In the above embodiment, there are two upper frame base members 31, 34, but there may be only one if it is possible to sufficiently mount the shutter 1. If there is only one upper frame base member, it may be placed between the upper frame base members 31, 34 in the above embodiment.
In the above embodiment, the gap concealing member 35 is attached to the visible surface 322 of the lower frame base material 32, but it may be attached to another location as long as it can close the gap that occurs when the lower frame base material 32 does not abut against the FRP waterproof layer 26. Furthermore, the gap concealing member 35 attached to the lower part of the visible surface 332 of the vertical frame base material 33 may also be attached to another location as described above.
In the previous embodiment, the gap concealing member 35 is configured and arranged to conceal the gap with the sliding window 4, but this is not limited to this, and the configuration and arrangement may also be such that an elastic abutment 354 or the like abuts against the FRP waterproof layer 26 on the outer periphery of the sliding window 4, and in this case too, light leakage from between the lower frame base material 32 or vertical frame base material 33 and the sliding window 4 can be suppressed.
In the above embodiment, the shutter 1 has a frame body (four-sided frame) formed by framing the upper frame 11, the lower frame 12, and the left and right vertical frames 13, but this is not limited to this, and it is also possible to have a frame body (three-sided frame) excluding the lower frame 12. Also, while the base frame (four-sided base frame) is formed by framing the upper frame base material 34, the lower frame base material 32, and the left and right vertical frame base materials 33, it is also possible to form a base frame (three-sided base frame) excluding the lower frame base material 32.
In the above embodiment, separate upper frame base materials 31, 34, lower frame base material 32, and left and right vertical frame base materials 33 are attached to the shutter case 18, upper frame 11, lower frame 12, and left and right vertical frames 13, but this is not limited to this, and it is also possible to form the upper frame base materials 31, 34, lower frame base material 32, and left and right vertical frame base materials 33 integrally with the shutter case 18, upper frame 11, lower frame 12, and left and right vertical frames 13.
In the above embodiment, the base frame is fixed to the building main body 2 and then the shutter 1 is attached to the base frame, but this is not limited to this, and the base frame may be attached to the shutter 1 and then fixed to the building main body 2.
In the above embodiment, the sliding window 4 is used as a fixture, but it is not limited to this and may be any other type of window or other fixture. Also, the shutter 1 (exterior fixture) is used as a building attachment, but it is not limited to this and may be any other type of building attachment.

[Summary of the present invention]
The mounting structure for a building attachment of the present invention is a mounting structure for mounting a building attachment to a building frame having an opening in which fittings are to be installed, wherein the exterior wall surface of the building frame is composed of an exterior wall material and a waterproofing layer that is lower than the exterior wall material and has a projected position on the indoor side, and an upper frame base material, a lower frame base material, and left and right vertical frame base materials are attached to the building attachment, and the upper frame base material, the lower frame base material, and the left and right vertical frame base materials are framed to form a base frame, and the upper frame base material and the left and right vertical frame base materials are fixed to the building frame facing the outdoor side of the exterior wall material, and the lower frame base material is positioned facing the outdoor side of the waterproofing layer at a distance.
According to the mounting structure for building accessories of the present invention, three sides of the base frame, i.e., the upper frame base material and the left and right vertical frame base materials, are fixed to the building skeleton, so sufficient mounting strength for the building accessories can be obtained without fixing the lower frame base material, which is framed with these, to the building skeleton with screws, etc. Therefore, by fixing the lower frame base material to the building skeleton with screws, etc., screw holes, etc. are not formed in the waterproof layer, and the waterproof layer can be maintained waterproof without a separate waterproofing treatment.

In the mounting structure for building accessories of the present invention, the lower frame base material is positioned below the fitting, and a gap-concealing member that covers the gap between the fitting and the waterproof layer may be attached to the lower frame base material.
According to this configuration, by installing the gap-concealing member described above, light leakage from between the lower frame base material and the fittings can be suppressed.

In the mounting structure for building accessories of the present invention, the vertical frame base material is positioned on the left and right outer periphery of the building fixture, the lower part of the vertical frame base material is positioned facing the outside of the room relative to the waterproof layer, and a gap-concealing member is attached to the lower part of the vertical frame base material to be placed in the gap between the building fixture or the waterproof layer.
According to this configuration, by installing the gap-concealing member described above, light leakage from the lower part of the vertical frame base material and between the fittings can be suppressed.

In the mounting structure for building attachments of the present invention, the gap-concealing member has an mounting piece portion that is attached to the base frame and a gap-concealing piece portion that is continuous with the mounting piece portion, and an elastic abutment body that is pressed against the building fixture or the waterproof layer may be installed on the gap-concealing piece portion.
With this configuration, the mounting piece portion is attached to the lower frame base material or the vertical frame base material in advance, and when these are fixed to the building structure, the elastic abutment body is pressed against the fixture, thereby tightly sealing the gap between the lower frame base material or the vertical frame base material and the fixture or the waterproof layer, thereby suppressing light leakage.

In the mounting structure for building accessories of the present invention, the lower frame base material is positioned below the door/window fixture, and a gap-concealing member is attached to the visible surface of the lower frame base material facing the waterproof layer, and the vertical frame base material is positioned on the left and right outer periphery of the door/window fixture, the lower part of the vertical frame base material is positioned facing the outside of the room relative to the waterproof layer, and a gap-concealing member is attached to the visible surface of the lower part of the vertical frame base material facing the waterproof layer, and the gap-concealing member is attached to the visible surface of the lower part of the vertical frame base material facing the waterproof layer, and the gap-concealing member has an attachment piece attached to the door/window fixture and a gap-concealing piece connected to the attachment piece, and an elastic abutment is installed on the gap-concealing piece that is pressed against the door/window fixture, and the elastic abutment of the gap-concealing member attached to one of the lower frame base material and the vertical frame base material is pressed against the elastic abutment of the gap-concealing member attached to the other of the lower frame base material and the vertical frame base material.
With this configuration, the elastic abutting bodies of the gap-concealing members can be pressed against each other at the corner formed by the lower frame base material and the vertical frame base material, thereby suppressing light leakage from around the corner.

The base unit of the present invention is characterized in that it is composed of the above-mentioned gap-concealing member and a lower frame base material to which the gap-concealing member is attached.
With this configuration, it is possible to construct a base unit that can achieve the same effects as the mounting structure for building attachments of the present invention described above.

The base unit of the present invention is characterized in that it is composed of the above-mentioned gap-concealing member and a vertical frame base material to which the gap-concealing member is attached.
With this configuration, it is possible to construct a base unit that can achieve the same effects as the mounting structure for building attachments of the present invention described above.

The method for installing a building attachment of the present invention is a method for installing a building attachment to a building body having an opening in which fittings will be installed, and is characterized in that the upper frame base material, lower frame base material, and left and right vertical frame base materials that constitute the aforementioned base frame are fixed to the building body in a state of abutting along the exterior wall material that constitutes the exterior wall surface of the building body, the lower frame base material is positioned facing the outside of the waterproofing layer that constitutes the exterior wall surface of the building body and is located further inside the room than the exterior wall material, and the building attachment is attached to the upper frame base material, lower frame base material, and left and right vertical frame base materials.
According to the method for mounting a building attachment of the present invention, it is possible to configure a method for mounting a building attachment that can achieve the same effects as the mounting structure for a building attachment of the present invention described above.

In the method for installing building attachments of the present invention, the mounting piece portion of the gap-concealing member described above is attached to at least one of the base materials, the lower frame base material and the vertical frame base material, and the at least one base material may be fixed to the building main body with the elastic abutment body of the gap-concealing member pressed against the building fixture.
With this configuration, the gaps between the lower frame base material and the vertical frame base material and the fixture can be tightly sealed, thereby suppressing light leakage.

1...Shutter (building attachment), 10...Frame, 11...Upper frame, 12...Lower frame, 13...Vertical frame, 18...Shutter case, 2...Building frame, 25...Exterior wall material, 26...FRP waterproof layer (waterproof layer), 3...Balcony, 31, 34...Upper frame base material, 32...Lower frame base material, 33...Vertical frame base material, 35...Gap concealing member, 351...Mounting piece, 352...Gap concealing piece, 353...Gutter, 354...Elastic abutment, 37, 38...Base unit, 4...Sliding window (door and fixture), 42...Window lower frame, 43...Window vertical frame, 5...Opening, 6, 8...Screw, 7...Fixing screw.

Claims (6)

A mounting structure for attaching a building attachment to a building skeleton having an opening in which a fixture is to be installed,
The exterior wall surface of the building skeleton is composed of an exterior wall material and a waterproof layer that is below the exterior wall material and has a projected position on the indoor side,
An upper frame base material, a lower frame base material, and left and right vertical frame base materials are attached to the building attachment,
The upper frame base material, the lower frame base material, and the left and right vertical frame base materials are framed to form a base frame,
The upper frame base material and the left and right vertical frame base materials are fixed to the building skeleton facing the exterior side of the exterior wall material,
The mounting structure for a building attachment, wherein the lower frame base material is not attached to the waterproof layer and is arranged facing the waterproof layer on the outdoor side with a gap therebetween. The mounting structure for a building attachment according to claim 1,
The lower frame base material is arranged below the building fixture,
A mounting structure for a building attachment, characterized in that a gap-concealing member is attached to the soffit base material to be placed in a gap between the building fixture or the waterproof layer. The mounting structure for a building attachment according to claim 2,
The gap concealing member has an attachment piece portion attached to the base frame and a gap concealing piece portion continuous with the attachment piece portion,
A mounting structure for a building attachment, characterized in that an elastic abutment body that is pressed against the fixture or the waterproof layer is installed on the gap concealing piece. A base unit comprising a gap concealing member used in the mounting structure of a building attachment according to claim 2 and a lower frame base material to which the gap concealing member is attached. A method for mounting a building attachment constituting the mounting structure for a building attachment according to any one of claims 1 to 3, comprising:
The upper frame base material and the left and right vertical frame base materials of the base frame used in the mounting structure of the building attachment are fixed to the building skeleton in a state of abutting along the exterior wall material that constitutes the exterior wall surface of the building skeleton,
The lower frame base material is arranged facing the exterior side of the waterproof layer, without being attached to the waterproof layer that forms the exterior wall surface of the building body and whose prospective position is located on the interior side of the room relative to the exterior wall material,
A method for attaching a building attachment, characterized in that the building attachment is attached to the upper frame base material, the lower frame base material, and the left and right vertical frame base materials. The method for attaching a building attachment according to claim 5,
A method for installing a building attachment, characterized in that an attachment piece portion of a gap-concealing member used in the installation structure of a building attachment described in claim 3 is attached to at least one of the base materials of the lower frame base material and the vertical frame base material, and the at least one base material is fixed to the building main body with the elastic abutment of the gap-concealing member pressed against the building fixture.