JP6965100B2 - Waterproof structure of the outer wall mounting part of the building unit - Google Patents

Description

The present invention relates to a waterproof structure of an outer wall mounting portion of a building unit.

The following Patent Document 1 discloses a fireproof structure of a mounting portion for mounting a protruding portion such as a balcony or an eave that protrudes from the outer wall of a unit building covered with an outer wall material made of lightweight cellular concrete to the building. According to this structure, the protrusions are attached directly to the skeleton of the building via the attachments to ensure attachment strength. For this reason, the outer wall is formed with an opening for opening the mounting portion to the outdoor side of the building, and the mounting portion is provided with a fireproof structure separately from the outer wall having fire resistance.

Specifically, a fireproof surface material different from the outer wall material is attached to the building via a base frame having a shape corresponding to the mounting portion, and the outdoor side surface of the fireproof surface material is a plurality of cover surfaces. By being covered with a material, a fireproof structure of the mounting portion is constructed. As a result, the productivity of the building unit can be improved because the manufacturing efficiency of the outer wall material is not impaired and the mounting portion can be easily manufactured while ensuring the fire resistance.

Japanese Patent Application Laid-Open No. 8-199707

However, in the waterproof structure of the mounting portion described in Patent Document 1, a waterproof tape is interposed between the cover surface material and the fireproof surface material along the edge of the cover surface material, and the outer shape of the mounting portion is formed. A waterproof tape is adhered along the edge of the base frame assembled accordingly. As described above, in order to perform the waterproof treatment using the waterproof tape, it is necessary to attach the waterproof tape along the edge of the cover surface material and the base frame, which complicates the work. Therefore, it is conceivable to waterproof the outer peripheral portion of the bracket exposed from the opening toward the outdoor side by caulking treatment, but since the coking treatment requires management of joint width and joint depth, the frame. It is necessary to provide a material to strictly control the accuracy of the position and dimensions of the opening. Further, as a pretreatment, a primer treatment around the opening for preventing the peeling of the caulking and a curing work of the portion not subjected to the caulking treatment are required, and as a post-treatment, it takes time to dry after the caulking treatment. Therefore, the waterproof treatment by the caulking treatment increases the work man-hours and the cost. As described above, the waterproofing treatment can be performed by a simple method, and there is room for improvement in the waterproofing structure of the outer wall mounting portion of the building unit in order to reduce the work man-hours.

In consideration of the above facts, an object of the present invention is to obtain a waterproof structure for an outer wall mounting portion of a building unit, which can be reliably waterproofed by a simple method and can reduce work man-hours and costs. be.

The waterproof structure of the outer wall mounting portion of the building unit according to the first aspect is arranged on the outdoor side of the skeleton frame of the building unit, and has a bracket protruding from the outer surface of the skeleton frame toward the outdoor side and the above. An outer wall attached to the outdoor side of the skeleton frame of the building unit, an opening provided on the outer wall into which the bracket is inserted when the outer wall is attached to the building unit, and an extendable base material are used. The outer peripheral portion of the base material formed of the adhesive layer and provided with the adhesive layer is adhered to the indoor side surface of the outer wall, and covers the opening to prevent water from entering the indoor side of the outer wall from the outside. It is equipped with waterproof tape.

In the waterproof structure of the outer wall mounting portion of the building unit according to the first aspect, a waterproof tape covers the opening in order to prevent water from entering the indoor side of the outer wall from the outside. The waterproof tape is formed by using an stretchable base material, and since the outer peripheral portion provided with the adhesive layer is adhered to the indoor side surface of the outer wall, no gap is created between the outer wall and the bracket. As a result, it is not necessary to bond the waterproof tape along the gap between the outer wall and the bracket, and the waterproof treatment of the outer wall mounting portion of the building unit can be easily performed.

Further, according to the first aspect, since the waterproof tape may be adhered to the indoor side surface of the outer wall so as to cover the opening, the frame material to the opening may be attached before the outer wall is attached to the building unit. It is not necessary to control the accuracy of the arrangement and the position and size of the opening, and the priming process and the curing work are not required. In addition to this, after the outer wall is attached, there is no waiting time until the next work process is executed, such as the filling of the caulking material around the opening and the drying time thereof. In this way, the waterproof treatment can be performed by a simple method, and the man-hours and costs for attaching the outer wall to the building unit can be reduced.

Further, according to the first aspect, the waterproof tape adhered to the indoor side surface of the outer wall is pushed out toward the outdoor side by the bracket inserted into the opening of the outer wall. At this time, since the waterproof tape formed by using the stretchable base material is stretched from the opening toward the outdoor side according to the shape of the bracket, excessive stress is not generated in the waterproof tape. Therefore, the waterproof tape is stretched without cracking and does not form a fragile portion between the outer peripheral portion and the outer wall of the waterproof tape. Thereby, the waterproof tape can ensure the waterproof treatment for the outer wall.

The waterproof structure of the outer wall mounting portion of the building unit according to the second aspect is the central portion in which the waterproof tape is an inner portion of the outer peripheral portion with which the bracket inserted into the opening abuts. A stretch-inhibiting film having substantially the same shape as the abutting portion is arranged therein.

According to the waterproof structure of the outer wall mounting portion of the building unit according to the second aspect, the central portion, which is the inner portion of the outer peripheral portion of the waterproof tape to which the bracket inserted in the opening abuts, is abbreviated as the abutting portion. Stretch suppression films of the same shape are arranged. Therefore, even if the bracket is inserted into the opening and the waterproof tape is stretched, the central portion where the expansion / contraction suppressing film is arranged is not stretched. Therefore, the position of the bracket that cannot be directly viewed from the outdoor side because the opening is covered with the waterproof tape can be confirmed from the outdoor side. This makes it possible to facilitate the alignment when the outer wall is attached to the building unit.

As for the waterproof structure of the outer wall mounting portion of the building unit according to the third aspect, in the second aspect, a thermoplastic resin is used for the expansion / contraction suppressing film.

According to the waterproof structure of the outer wall mounting portion of the building unit according to the third aspect, since the stretch-inhibiting film uses a thermoplastic resin, the rigidity against tension is higher than that of the base material of the stretchable waterproof tape. can do. Therefore, when the bracket is inserted into the opening, even if the portion other than the central portion of the waterproof tape is stretched, the central portion is not stretched. This makes it possible to easily and reliably align the outer wall when it is attached to the building unit.

As for the waterproof structure of the outer wall mounting portion of the building unit according to the fourth aspect, in any one of the first to third aspects, a butyl tape stretchable as a base material is used as the waterproof tape. Be done.

According to the waterproof structure of the outer wall mounting portion of the building unit according to the fourth aspect, since the stretchable butyl tape is used as the base material of the waterproof tape, sufficient adhesive strength and weather resistance to the outer wall are ensured. can do. As a result, the adhesive strength to the outer wall and the durability when used outdoors can be sufficiently ensured, and the waterproof performance of the waterproof tape to the outer wall can be stably ensured.

As described above, the waterproof structure of the outer wall mounting portion of the building unit according to the first aspect is excellent in that the waterproof treatment can be reliably performed by a simple method, and the work man-hours and costs can be reduced. Has an effect.

The waterproof structure of the outer wall mounting portion of the building unit according to the second aspect has an excellent effect that the positioning of the outer wall and the contact portion of the bracket can be facilitated.

The waterproof structure of the outer wall mounting portion of the building unit according to the third aspect has an excellent effect that the alignment when the outer wall is mounted on the building unit can be easily and surely made.

The waterproof structure of the outer wall mounting portion of the building unit according to the fourth aspect has an excellent effect that the waterproof performance of the waterproof tape on the outer wall can be stably secured while sufficiently ensuring the adhesive strength and the weather resistance performance on the outer wall. ..

It is an example of a unit building to which the waterproof structure of the outer wall mounting part of the building unit which concerns on this embodiment is applied, (A) is a schematic plan view which shows a key plan, and (B) is a schematic perspective view which shows a skeleton. .. It is a side view of the waterproof structure in the part seen by arrow A in FIG. 1 as viewed from the outdoor side with the sleeve wall removed. FIG. 3 is a plan view showing a state in which the waterproof structure of the outer wall mounting portion is cut in the horizontal direction of the building along the 3-3 line shown in FIG. It is a vertical cross-sectional view which shows the state which cut the waterproof structure of the outer wall mounting part in the vertical direction of a building along line 4-4 shown in FIG. FIG. 5 is an external perspective view showing a method of installing an outer wall to which a waterproof tape according to the present embodiment is attached to a building frame. It is a top view which shows the key plan of the modification of the building unit which concerns on this embodiment. It is a schematic perspective view which shows the skeleton of the modification of the building unit which concerns on this embodiment.

Hereinafter, an embodiment of a waterproof structure for an outer wall mounting portion of a building unit according to the present invention will be described with reference to FIGS. 1 to 5.

First, the unit building 10 and the building units 12 constituting the unit building 10 will be outlined.

1A and 1B show a schematic view of a unit building 10 to which a waterproof structure of an outer wall mounting portion of a building unit according to the present embodiment is applied. As shown in these figures, the unit building 10 is a building on the first floor portion 14 formed by installing a plurality of building units 12 on a foundation (not shown) and on the building unit 12 of the first floor portion 14. It is composed of a second floor portion 16 formed by installing the unit 12 and an eaves 18 protruding from the upper end portion of one building unit 12 on the girder side of the second floor portion 16.

The building unit 12 constituting the unit building 10 described above includes a rigid frame frame 20 having a rigid frame structure assembled in a rectangular parallelepiped shape and an outer wall panel 22 (see FIG. 5) arranged on the outdoor side surface of the rigid frame frame 20. , An inner wall panel (not shown) arranged on the indoor side of the outer wall panel 22 is included.

The skeleton frame 20 is joined to four pillars 24 erected at four corners, a ceiling frame 26 joined to the upper ends of the four pillars 24 to form a ceiling surface, and lower ends of the four pillars 24. It is configured to include a floor frame (not shown) that constitutes the floor surface. As the column 24, a steel pipe column having a hollow square cross-sectional shape is used. The ceiling frame 26 is composed of two types of long and short ceiling beams 28 and 30, and a plurality of ceiling beams (not shown) bridged between the ceiling beams 28 on the girder side at predetermined intervals. The floor frame is also configured in the same manner as the ceiling frame 26. In FIG. 5, the upper end of the column 24 is joined to two side surfaces where the longitudinal end of the ceiling girder 28 and the longitudinal end of the ceiling girder 30 are adjacent to each other, but the upper end of the column 24 is actually used. The part is separated from the pillar 24 and is used as a ceiling joint. The floor frame side is also configured in the same manner as the ceiling frame 26 side.

On the other hand, the outer wall panel 22 is arranged adjacent to the first outer wall panel (corner panel) 32 as an outer wall arranged around the pillar 24 arranged at the protruding corner and the first outer wall panel 32. The second outer wall panel (outer peripheral panel) 34 is included. The first outer wall panel 32 is made of metal and L-shaped, which are arranged on the back surfaces of the first outer wall material 36 formed in an L shape in a plan view and the left and right ends of the first outer wall material 36, respectively. A first outer wall frame 38 and the like are provided. A bolt insertion hole is formed on the erecting surface of the first outer wall frame 38. The second outer wall panel 34 is a second outer wall material 40 formed linearly in a plan view, and a metal and U-shaped first arranged on the back surfaces of the left and right ends of the second outer wall material 40, respectively. 2 The outer wall frame 42 and the like are provided. A weld nut 44 is pre-welded to the second outer wall frame 42 coaxially with the bolt insertion hole of the first outer wall frame 38. The second outer wall panel 34 is arranged on the side surface of the skeleton frame 20 by attaching the second outer wall frame 42 to the ceiling girder 28 (or the ceiling girder 30) and the floor girder on the gable side (or the floor girder on the gable side). ing. On the other hand, the first outer wall panel 32 is fixed to the second outer wall panel 34 by bringing the first outer wall frame 38 into contact with the web surface of the second outer wall frame 42 and screwing the mounting bolt 46 into the weld nut 44. Has been done.

An eaves 18, which is a kind of loggia, is provided at the upper end of the building unit 12 of the second floor portion 16 of the unit building 10 described above. Hereinafter, the waterproof structure of the connection portion between the eaves 18 and the first outer wall panel 32 (the A-line arrow viewing portion in FIGS. 1A and 1B) will be described in detail.

As shown in FIGS. 3 to 5, a bracket 50 formed in a U shape in a plan view is fixed to the side surface of the upper end of the pillar 24 on the outdoor side by welding. The bracket 50 includes a rectangular flat top 50A arranged parallel to the outdoor side surface of the upper end of the pillar 24, and a pair of left and right legs bent toward the pillar 24 from both ends in the width direction of the top 50A. It is composed of 50B and. A pair of upper and lower bolt insertion holes 52 are formed in the middle portion in the width direction of the top portion 50A. Further, on the back surface of the top portion 50A, a pair of upper and lower weld nuts 54 are welded in advance coaxially with each bolt insertion hole 52.

As described above, the first outer wall panel 32 formed in an L shape in a plan view is arranged around the pillar 24. At a position of the first outer wall material 36 of the first outer wall panel 32 facing the bracket 50, an opening 56 formed in a rectangular shape slightly larger than the bracket 50 is formed. A portion other than the top portion 50A of the bracket 50 and the base end portion of the pair of leg portions 50B described above is inserted into the opening 56. The height of the bracket 50 is determined so that the end surface of the top portion 50A is substantially flush with the design surface of the first outer wall material 36 in a state where the bracket 50 is inserted into the opening 56.

A base end portion of a beam member (in a broad sense, an element grasped as a "logia (ceiling) girder") 60 included in the eaves 18 is fastened and fixed to the top portion 50A of the bracket 50 described above. Specifically, channel steel is used for the beam member 60, and a rectangular flat plate-shaped base plate 62 is attached to one end (open portion) in the longitudinal direction thereof by welding so as to close the open portion. ing. The lengthwise dimension of the base plate 62 is set longer than that of the beam member 60. The base plate 62 is also formed with a bolt insertion hole (not shown) coaxially with the pair of upper and lower weld nuts 54. Then, the mounting bolt 64 is inserted into the bolt insertion hole of the base plate 62 and the bolt insertion hole 52 of the top 50A of the bracket 50 from the beam member 60 side and screwed into the weld nut 54, whereby the beam member 60 of the eaves 18 is screwed. The base end portion of the bracket 50 is fastened and fixed to the top portion 50A of the bracket 50.

A waterproof tape 70 is interposed between the base end portion (base plate 62) of the beam member 60 of the eaves 18 and the top portion 50A of the bracket 50. The waterproof tape 70 is composed of a butyl tape 72 cut into a rectangular shape larger than the opening 56, and a rectangular expansion / contraction suppressing film 74 arranged at the center of the butyl tape 72.

Butyl tape 72 has water stopping property, elasticity and weather resistance, and constitutes a base material of the waterproof tape 70. Further, the butyl tape 72 has an outdoor side surface 70A and an indoor side surface 70B, of which an adhesive layer is provided on the outdoor side surface. In this embodiment, butyl tape 72 is used as the base material of the waterproof tape 70, but the present invention is not limited to this, as long as it is a sheet material having water-stopping property, elasticity, weathering property and adhesiveness (on one side). Applicable.

On the other hand, the expansion / contraction suppressing film 74 is composed of a film having no or almost no elasticity. As the expansion / contraction suppressing film 74, for example, a thermoplastic resin such as polypropylene resin or polyolefin resin can be used. In the present embodiment, a thermoplastic resin such as polypropylene resin or polyolefin resin is used as the expansion / contraction suppressing film 74, but the present invention is not limited to this, as long as it is a film material capable of obtaining the expansion / contraction suppressing effect of the central portion of the butyl tape 72. Applicable. The expansion / contraction suppressing film 74 has substantially the same size as the top 50A of the bracket 50.

As described above, an adhesive layer is provided on the outdoor side surface of the butyl tape 72, and the expansion / contraction suppressing film 74 is attached to the central portion thereof. As a result, the waterproof tape 70 is configured in which the expansion / contraction suppressing film 74 is arranged in the central portion 70X and the adhesive layer is provided in the outer peripheral portion 70Y. A pair of upper and lower bolt insertion holes 76 are formed coaxially with the weld nut 54 described above in the central portion 70X of the waterproof tape 70.

The outer peripheral portion 70Y of the waterproof tape 70 having the above configuration is adhered to the peripheral portion of the opening 56 of the first outer wall panel 32. As a result, the opening 56 is closed by the waterproof tape 70. In a state where the base end portion of the beam member 60 of the eaves 18 is fastened and fixed to the top portion 50A of the bracket 50, the outer peripheral portion 70Y of the butyl tape 72 is extended when the bracket 50 is inserted into the opening 56. The expansion / contraction suppressing film 74 is interposed (sandwiched) between the top portion 50A of the bracket 50 and the base plate 62 of the beam member 60 in the outer peripheral portion extended state, and the mounting bolt 64 is fastened and fixed to the weld nut 54.

(Action and effect of this embodiment)

Next, the operation and effect of the present embodiment will be described in comparison with the prior art.

When waterproofing is performed by caulking as in the conventional technique, primer treatment (caulking peeling prevention treatment) and curing work are required for the opening 56 as a pre-setup for the caulking treatment, which is troublesome. It takes.

On the other hand, in the present embodiment, the waterproof tape 70 may be adhered to the indoor surface of the first outer wall material 36 so as to cover the opening 56, so that the opening 56 is primed and cured. Is no longer needed. Moreover, since the waterproof tape 70 has an adhesive layer on one side thereof, it can be adhered to the first outer wall material 36 at the outer peripheral portion 70Y excluding the central portion 70X on which the expansion / contraction suppressing film 74 is arranged. Therefore, the waterproof tape 70 can be attached to the first outer wall material 36 with one touch without positioning the position where the waterproof tape 70 is attached to the first outer wall material 36. As a result, waterproofing can be easily performed.

Further, in the case of caulking processing, since it is necessary to manage the joint width and joint depth as a preliminary preparation for attaching the first outer wall panel 32 to the skeleton frame 20, the accuracy of the position and dimensions of the opening 56 and the first outer wall It is necessary to strictly control the assembly accuracy of the panel 32. Further, before the caulking treatment, a primer treatment (caulking peeling prevention treatment) and a curing work of the opening 56 are required.

On the other hand, according to the present embodiment, since it is sufficient that the bracket 50 can be inserted into the opening 56 provided in the first outer wall panel 32, the position and dimensions of the opening 56 and the set of the first outer wall panel 32 High accuracy is not required for attachment accuracy. Further, when the first outer wall panel 32 is attached to the skeleton frame 20 via the opening 56, construction management as in the case of performing a caulking process becomes unnecessary. Further, the priming treatment and the curing work around the opening 56 before attaching the first outer wall material 36 to the skeleton frame 20 become unnecessary.

Further, in the case of the caulking process, as a process immediately after attaching the first outer wall panel 32 to the opening 56, it is necessary to fill the periphery of the opening 56 with the caulking material and it takes time to dry the caulking material. Lead time is required until the next work process is implemented.

On the other hand, in the present embodiment, since the bracket 50 is simply inserted into the opening 56 to which the waterproof tape 70 is adhered, the caulking material around the opening 56 after the first outer wall material 36 is attached. There is no need for work such as filling. Furthermore, there is no lead time until the next work process, such as the drying time of the caulking material. As a result, not only the work man-hours related to the attachment of the waterproof tape 70, but also the work man-hours and the cost before and after attaching the first outer wall material 36 to the skeleton frame 20 can be reduced.

Further, according to the present embodiment, the waterproof tape 70 covering the opening 56 of the first outer wall material 36 is pushed out to the outdoor side by the bracket 50 inserted into the opening 56 of the first outer wall material 36. At this time, since the outer peripheral portion 70Y of the waterproof tape 70 is extended from the opening 56 toward the outdoor side due to the elasticity of the butyl tape 72, excessive stress is not generated in the waterproof tape 70. Therefore, the waterproof tape 70 is stretched without causing cracks, and no fragile portion is formed between the outer peripheral portion 70Y of the waterproof tape 70 and the first outer wall material 36. As a result, the waterproof tape 70 can reliably waterproof the space between the first outer wall material 36 and the bracket 50.

Further, in the present embodiment, the expansion / contraction suppressing film 74 having substantially the same shape as the portion where the top portion 50A of the bracket 50 abuts on the butyl tape 72 is arranged on the central portion 70X of the waterproof tape 70. Therefore, the top 50A of the bracket 50 and the waterproof tape 70 can be easily aligned. This makes it possible to easily attach the first outer wall panel 32 to the skeleton frame 20.

Further, since the central portion 70X on which the expansion / contraction suppressing film 74 is arranged is not stretched even if the bracket 50 is inserted into the opening 56, the bolt insertion hole 76 formed in the waterproof tape 70 is inserted into the opening 56 of the bracket 50. The state of facing the bolt insertion hole 76 is maintained even after the insertion of the bolt. Therefore, the position of the bolt insertion hole 52 of the bracket 50, which cannot be directly seen from the outdoor side, can be reliably grasped. As a result, the beam member 60 of the eaves 18 can be easily attached to the bracket 50.

In addition to this, the mounting bolt 64 that fastens the beam member 60 of the eaves 18 and the bracket 50 is screwed into the weld nut 54 through the bolt insertion hole 76, so that the mounting bolt 64 is provided by the waterproof tape 70. The waterproof performance between the bolt insertion hole 52 and the bolt insertion hole 52 is improved.

Summarizing the above, according to the waterproof structure of the outer wall mounting portion of the building unit according to the present embodiment, the waterproof treatment can be reliably performed by a simple method, and the work man-hours and the cost can be reduced.

Further, according to the present embodiment, since the expansion / contraction suppressing film 74 forming the central portion 70X of the waterproof tape 70 uses a thermoplastic resin, it is compared with the butyl tape 72 which is the base material of the waterproof tape 70. It is possible to increase the rigidity against tension. Therefore, when the bracket 50 is inserted into the opening 56, even if the portion other than the central portion 70X is extended, the central portion 70X is not extended. This makes it possible to easily and reliably attach the first outer wall panel 32 to the skeleton frame 20.

Further, according to the present embodiment, the stretchable butyl tape 72 used as the base material of the waterproof tape 70 has sufficient adhesive strength and weather resistance. Therefore, the adhesive strength to the first outer wall material 36 and the durability when used outdoors can be sufficiently ensured, and the waterproof performance of the waterproof tape 70 to the first outer wall material 36 can be stably ensured.

The above-described embodiment has been described as a waterproof structure when the eaves 18 are attached to the first outer wall panel 32 and the second outer wall panel 34 of the second floor portion 16 of the unit building 10, but the present invention is not limited to this. The present invention may be applied to the first outer wall panel 32 and the second outer wall panel 34 of the portion 14, or the loggia portion 80 (see the arrow-viewing portion of line B in FIG. 6) and the balcony portion 90 (see the arrow-viewing portion of line B in FIG. 6) using the setback portion. The present invention may be applied to a waterproof structure when the unit building is attached to the outer wall portion of the unit building, etc.

Further, in the above-described embodiment, the bracket 50 is described as being arranged on the pillar 24 of the skeleton frame 20 and being inserted into the opening 56 provided in the first outer wall material 36 of the first outer wall panel 32. However, the present invention is not limited to this, and the bracket may be inserted into the opening provided in the outer wall material of the second outer wall panel while being arranged on the ceiling girders 28, 30 or the floor girder.

Further, in the above-described embodiment, the waterproof tape 70 is formed by attaching the expansion / contraction suppressing film 74 to the central portion of the butyl tape 72, but the present invention is not limited to this, and the expansion / contraction suppressing film 74 may be omitted. In this case, since the central portion of the waterproof tape extends when it is pushed by the bracket, even if the bolt insertion hole is formed in advance, it will come off from the bolt insertion hole of the bracket. Therefore, according to this aspect, although the workability is slightly lowered, the waterproof performance is ensured because the butyl tape is present.

12 Building unit 20 Frame frame 32 1st outer wall panel (outer wall)
50 Bracket 56 Opening 70 Waterproof tape 70X Central part 70Y Outer part 72 Butyl tape 74 Stretch suppression film

Claims (3)

A bracket that is arranged on the outdoor side of the skeleton frame of the building unit and protrudes from the outer surface of the skeleton frame toward the outdoor side.
An outer wall attached to the outdoor side of the skeleton frame of the building unit, and
An opening provided in the outer wall into which the bracket is inserted when the outer wall is attached to the building unit.
The outer peripheral portion of the base material formed of the stretchable base material and provided with the adhesive layer is adhered to the indoor side surface of the outer wall, covers the opening, and goes from the outside to the indoor side of the outer wall. Waterproof tape to prevent water from entering
Equipped with a,
The waterproof tape is configured by arranging an expansion / contraction suppressing film having substantially the same shape as the abutting portion in a central portion which is an inner portion of the outer peripheral portion abutting the bracket inserted in the opening. waterproof structure of the outer wall mounting part of the building units are. The waterproof structure of the outer wall mounting portion of the building unit according to claim 1, wherein a thermoplastic resin is used for the expansion / contraction suppressing film. The waterproof structure for an outer wall mounting portion of a building unit according to claim 1 or 2, wherein an extendable butyl tape is used as the base material of the waterproof tape.

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