JP6941438B2 - External insulation structure and its construction method - Google Patents

Description

The present invention relates to an external heat insulating structure provided with a heat insulating layer provided on the outside of the building frame and a moisture-proof layer provided on the outside of the heat insulating layer, and a construction method thereof.

As a heat insulating structure for a building frame such as a refrigerated / frozen warehouse, an external heat insulating structure in which a heat insulating layer is laid on the outside of the building frame is known. In such an external heat insulating structure, if air containing moisture invades the heat insulating layer side, there is a concern that the heat insulating property may be deteriorated due to internal dew condensation or the like. Therefore, a moisture-proof layer is provided on the outside of the heat-insulating layer, and the moisture-proof layer prevents air containing moisture from entering the heat-insulating layer (see, for example, Patent Documents 1 and 2).
Further, in the conventional external heat insulating structure of the building frame, the moisture-proof layer is formed by arranging a plurality of metal plate-shaped moisture-proof plates side by side in a state of being in close contact with each other.

In particular, the external heat insulating structure described in Patent Document 2 is a heat insulating and moisture proof panel (P) in which a heat insulating board (5A) functioning as a heat insulating layer and a metal plate-shaped moisture proof plate (5a) functioning as a moisture proof layer are integrated. ) Are arranged side by side on the outside of the building frame (3). Further, in the heat insulating and moisture proof panel (P) used in this external heat insulating structure, a moisture proof plate (5a) is laminated on the outer surface of the heat insulating board (5A) having both end edges formed in a hozo-gumi shape, and the moisture proof plate is laminated. The end portion of (5a) is folded back and embedded in the thick wall of the heat insulating board (5A). Then, when a plurality of heat insulating and moisture proof panels (P) configured in this way are arranged side by side on the outside of the building frame (3), the heat insulating board (5A) adjacent to the hozo groove (7) of the heat insulating board (5A). By fitting the hozo (8), the moisture-proof plates (5a) folded back at the ends of both heat insulating boards (5A) come into close contact with each other.

Japanese Unexamined Patent Publication No. 63-041784 Japanese Unexamined Patent Publication No. 2008-163761

In the external heat insulating structure of the building frame, the moisture-proof plate provided on the outside of the heat insulating layer rises in temperature due to an increase in outside air temperature, solar radiation, or the like, and tends to expand thermally. Therefore, as in the conventional external heat insulating structure described in Patent Documents 1 and 2 described above, when a plurality of metal plate-shaped moisture-proof plates are provided side by side in close contact with each other, thermal expansion or the like may occur. Due to the above factors, adjacent moisture-proof plates are pressed against each other and interfere with each other, resulting in deformation of the moisture-proof plates and peeling from the heat-insulating layer, resulting in a problem that the moisture-proof performance of the moisture-proof layer is impaired.

In view of this situation, the main problem of the present invention is to avoid interference due to thermal expansion between adjacent moisture-proof plates in the external heat insulating structure constructed for the building frame such as a refrigerating / freezing warehouse, and to cause the interference. The point is to provide a technology capable of preventing deformation and peeling of the moisture-proof plate and maintaining the moisture-proof performance of the moisture-proof layer.

The first characteristic configuration of the present invention is an external heat insulating structure including a heat insulating layer provided on the outside of the building frame and a moisture-proof layer provided on the outside of the heat insulating layer.
A plurality of metal plate-shaped moisture-proof plates in which the moisture-proof layers are arranged side by side with a gap between edges of adjacent ones, and a gap that closes the gap by following a change in the width of the gap. It is composed of a moisture-proof part,
An outer wall material is laid at a position separated outward from the moisture-proof layer, and an air layer is formed between the outer wall material and the moisture-proof layer.
The outer wall material is supported by a steel frame material fixed to the outer surface of the building frame.
A heat insulating material is filled around the steel frame material .
The heat insulating layer has a three-layer structure consisting of a two-layer heat insulating board and a one-layer heat insulating board in order from the building frame side, and the heat insulating board laid on the outermost side is integrated with the moisture-proof plate. It is provided as a heat insulating and moisture proof panel.
The heat-insulating and moisture-proof panel has an exposed surface in close contact with the adjacent heat-insulating board on the outer peripheral portion of the heat-insulating board, and the outer peripheral portion of the moisture-proof plate is brought into close contact with the outer peripheral portion of the outer surface of the building skeleton along the in-plane direction. The point is that it is constructed by retreating inward from the exposed surface.

According to this configuration, in the moisture-proof layer provided on the outside of the heat insulating layer, a gap is provided between the adjacent metal plate-shaped moisture-proof plates arranged side by side, so that the moisture-proof plate raises the outside air temperature. Even if it is thermally expanded due to solar radiation or the like, or if it is displaced in the in-plane direction due to other factors, interference between adjacent moisture-proof plates can be avoided by the above-mentioned gap. Further, even if the width of the gap formed between the adjacent moisture-proof plates changes due to such thermal expansion or displacement of the moisture-proof plate, the gap follows the change in the width of the gap. It is possible to prevent the intrusion of air containing moisture into the heat insulating layer side by the gap moisture-proof portion that closes the gap.
Therefore, according to the present invention, an external heat insulating structure capable of avoiding interference due to thermal expansion or the like between adjacent moisture-proof plates, preventing deformation or peeling of the moisture-proof plates due to the interference, and maintaining the moisture-proof performance of the moisture-proof layer. Can be provided.

The second characteristic configuration of the present invention is that the moisture-proof plate is preliminarily dispersed in the in-plane direction with insertion holes through which the heat insulating layer and the heat insulating anchor for fixing the moisture-proof layer are inserted with respect to the building frame. There is a point .
The third characteristic configuration of the present invention is that the gap moisture-proof portion is composed of a sealing portion made of an elastic material that fills the gap and a tape material that is attached so as to cover the outer surface side of the sealing portion. It is in.
Further, in another configuration of the present invention, a plurality of heat insulating and moisture proof panels formed by integrating the heat insulating layer and the moisture proof layer with the heat insulating board constituting the heat insulating layer and the moisture proof plate are arranged on the outside of the building frame. Set up and configured
The heat-insulating and moisture-proof panel has a contact-exposed surface in close contact with the adjacent heat-insulating board on the outer peripheral portion of the heat-insulating board, and the outer peripheral portion of the moisture-proof plate is retired inward from the close-contact exposed surface along the in-plane direction. It is in the point that it is composed by letting.

According to this configuration, in the heat insulating and moisture proof panel in which the heat insulating board and the moisture proof plate are integrated, the outer peripheral portion of the moisture proof plate is retreated inward from the close contact exposed surface formed on the outer peripheral portion of the heat insulating board. Adjacent to the heat insulating board by arranging a plurality of the heat insulating and moisture proof panels side by side on the outside of the building frame while keeping the exposed surfaces of the heat insulating board in close contact with each other while surely forming a gap between the adjacent moisture proof boards. It is possible to construct a heat insulating layer and a moisture proof layer having an external heat insulating structure in a state where heat dissipation between them is suppressed and excellent heat insulating performance is ensured.

In another configuration of the present invention, the moisture-proof plate has a bent portion on the outer peripheral portion, and the moisture-proof plate has a bent portion.
A fitting step portion in which the heat insulating board can be fitted to the edge portion of the outer peripheral portion on the moisture-proof plate side in a state where the bent portion of the moisture-proof plate retreats inward from the close contact exposed surface to form a gap. Have,
The heat-insulating and moisture-proof panel is configured by fitting the bent portion of the moisture-proof plate into the fitting step portion of the heat-insulating board.

According to this configuration, the moisture-proof plate is bent in a form in which the bent portion provided on the outer periphery of the moisture-proof plate is fitted to the fitting step portion formed on the edge of the outer peripheral portion of the heat insulating board. It is possible to manufacture a heat-insulating and moisture-proof panel having a high flatness by stably and firmly integrating the heat-insulating board and the moisture-proof plate while surely retreating the portion inward from the contact-exposed surface of the heat-insulating board.
Therefore, it is possible to prevent the moisture-proof plate from peeling off or deforming due to the deterioration of the adhesive force between the heat-insulating board and the prevention plate due to aged deterioration and the behavior due to the temperature change. By arranging a plurality of layers in parallel, a heat insulating layer and a moisture proof layer constructed by the plurality of heat insulating and moisture proof panels arranged side by side while forming a stable and uniform gap between the bent portions of the moisture proof plates adjacent to each other. It is possible to suppress the non-landing of.

Another configuration of the present invention is that a second heat insulating layer is provided on the outside of the moisture-proof layer.

According to this configuration, since the second heat insulating layer is provided on the outside of the moisture-proof layer, it is possible to suppress the transfer of heat due to an increase in outside air temperature or solar radiation from the second heat insulating layer side to the moisture-proof layer side. Can be done. As a result, the thermal expansion of the moisture-proof plates constituting the moisture-proof layer is suppressed, so that the width of the gap for avoiding interference between the moisture-proof plates due to the thermal expansion is made as small as possible, and fingers and foreign substances enter the gap. It is possible to avoid damage to the gap moisture-proof part due to insertion.

In the fourth characteristic configuration of the present invention, a heat insulating layer is laid on the outside of the building frame, and a moisture-proof layer is laid on the outside of the heat insulating layer to construct an external heat insulating structure according to any one of the first to third feature configurations. It is a construction method of the external heat insulation structure
A heat insulating board having a close contact exposed surface in close contact with an adjacent heat insulating board on the outer periphery, and a heat insulating board having an outer peripheral portion along the in-plane direction of the outer surface of the building frame retired inward from the close contact exposed surface along the in-plane direction. Using a heat-insulating and moisture-proof panel that is integrated with the moisture-proof plate that has been made in advance,
The heat insulating layer has a three-layer structure including a two-layer heat insulating board and a one-layer heat insulating board in order from the building frame side, and the heat insulating board laid on the outermost side is provided as the heat insulating and moisture proof panel.
A plurality of the heat insulating and moisture proof panels are arranged side by side on the outer surface of the building frame while the close contact exposed surfaces of the heat insulating boards are brought into close contact with each other adjacent to each other, and the moisture proof plates in the juxtaposed heat insulating and moisture proof panels are arranged side by side. By closing the gap formed between those adjacent to each other with a flexible gap moisture-proof portion, the heat-insulating board constitutes the heat-insulating layer, and the moisture-proof plate and the gap-moisture-proof portion form the moisture-proof layer. Is the point that constitutes.

According to this configuration, in the heat insulating and moisture proof panel in which the heat insulating board and the moisture proof plate are integrated, the outer peripheral portion of the moisture proof plate is retreated inward from the close contact exposed surface formed on the outer peripheral portion of the heat insulating board. By the simple work of arranging multiple heat-insulating and moisture-proof panels on the outside of the building frame while keeping the exposed surfaces of the heat-insulating boards in close contact with each other, a gap is surely formed between the adjacent moisture-proof plates. However, it is possible to construct the heat insulating layer and the moisture proof layer of the external heat insulating structure in a state of suppressing heat dissipation between adjacent heat insulating boards and ensuring excellent heat insulating performance.
Then, in the external heat insulating structure constructed in this way, a gap is provided between the adjacent metal plate-shaped moisture-proof plates arranged side by side. Even when it is thermally expanded or displaced in the in-plane direction due to other factors, interference between adjacent moisture-proof plates can be avoided by the above gap. Further, even if the width of the gap formed between the adjacent moisture-proof plates changes due to such thermal expansion or displacement of the moisture-proof plate, the gap follows the change in the width of the gap. It is possible to prevent the intrusion of air containing moisture into the heat insulating layer side by the gap moisture-proof portion that closes the gap.
Therefore, according to the present invention, an external heat insulating structure capable of avoiding interference due to thermal expansion or the like between adjacent moisture-proof plates, preventing deformation or peeling of the moisture-proof plates due to the interference, and maintaining the moisture-proof performance of the moisture-proof layer. A construction method can be provided.

Diagram explaining the external insulation structure of the building frame Schematic cross-sectional view showing the configuration of the external insulation structure constructed on the roof of the building frame Schematic cross-sectional view showing the configuration of the external heat insulating structure constructed on the side wall of the building frame. An exploded perspective view showing the configuration of a heat insulating and moisture proof panel Partially enlarged cross-sectional view of the external insulation structure constructed on the side wall of the building frame

An embodiment of the external heat insulating structure and the construction method thereof according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the external heat insulating structure 2 of the present embodiment is constructed to insulate the outdoor side of a reinforced concrete building frame 1 in a building 100 used for a refrigerating / freezing warehouse or the like. As the external heat insulating structure 2, in order to suppress heat transfer from the outside to the side wall portion 1W of the building frame 1, the outdoor side of the side wall portion 1W (in FIGS. 4 and 5, the right side of the side wall portion 1W is the outdoor side. ), And the outdoor side of the roof 1L in order to suppress heat transfer from the outside to the roof 1L of the building frame 1 (in FIG. 2, the upper side of the roof 1L is the outdoor side). The roof outer heat insulating structure 2L constructed in) is provided.

Further, inside the first floor slab 1F of the building frame 1 in contact with the ground, a floor insulation structure 2F is constructed in order to suppress heat transfer from the ground to the inside of the building 100 via the first floor slab 1F. Has been done. Then, the inside of the building 100 is insulated from the outside and the ground by these heat insulating structures 2W, 2L, and 2F.

[External insulation structure 2]
Hereinafter, a common configuration of the external heat insulating structure 2 configured as the side wall external heat insulating structure 2W and the roof external heat insulating structure 2L will be described.
As shown in FIGS. 2 and 3, the external heat insulating structure 2 includes a heat insulating layer A laid on the outside of the building frame 1 and a moisture proof layer B laid on the outside of the heat insulating layer A.
The heat insulating layer A is configured by arranging a plurality of heat insulating boards 12 and 13 side by side on the outer surface of the building frame 1. The heat insulating material constituting the heat insulating boards 12 and 13 can be appropriately used as long as it has heat insulating properties, and for example, a highly heat insulating material such as polyurethane foam, polystyrene foam, or glass wool is used. can do.
Further, in the present embodiment, the heat insulating layer A has a three-layer structure including a two-layer heat insulating board 13 and a one-layer heat insulating board 12 in order from the building frame 1 side. Although the details will be described later, the heat insulating board 12 laid on the outermost side is provided as a heat insulating and moisture proof panel 10 integrated with the moisture proof plate 11 provided on the outer surface thereof.
Further, when a plurality of the heat insulating board 13 and the heat insulating and moisture proof panel 10 are arranged side by side on the outside of the building frame 1 and laminated, they are arranged in a staggered pattern so that the seams do not overlap at the same place.

On the other hand, the moisture-proof layer B has non-breathability, and by providing the moisture-proof layer B on the outside of the heat insulating layer A, the infiltration of air containing moisture into the heat insulating layer A side is avoided, and the heat insulating layer is prevented from entering. Deterioration of heat insulating property due to internal dew condensation on the A side is prevented.
The heat insulating layer A and the moisture-proof layer B are fixed to the building skeleton 1 by penetrating a known heat insulating anchor 30 having a heat insulating property and driving the heat insulating layer A into the building skeleton 1. Further, an aluminum tape material 33 is attached to the head of the heat insulating anchor 30 exposed on the outer surface of the moisture-proof layer B so as to cover the heat insulating anchor 30 through the penetrating portion of the heat insulating anchor 30. The ingress of air containing moisture is prevented. That is, the tape material 33 also functions as the moisture-proof layer B.

As shown in FIGS. 2, 3 and 5, the moisture-proof layer B is a metal plate such as an aluminum steel plate, a stainless steel plate, and an aluminum-zinc alloy-plated steel plate, which are arranged side by side with a gap 15 provided between them. It is composed of a moisture-proof plate 11 having a shape, and a gap moisture-proof portion 32 that follows a change in the width of the gap 15 and closes the gap 15. Here, since the moisture-proof plate 11 is made of a metal plate, it is less likely to be scratched and has high strength as compared with the case where aluminum foil or the like is used. , It is possible to exert the strength that can withstand walking.

That is, in the moisture-proof layer B provided on the outside of the heat insulating layer A, a gap 15 is provided between adjacent a plurality of metal plate-shaped moisture-proof plates 11 arranged side by side, so that the moisture-proof plate 11 is exposed to the outside air temperature. Even if it is thermally expanded due to rising or sunlight, or if it is displaced in the in-plane direction due to other factors, the interference between the adjacent moisture-proof plates 11 is avoided by the gap 15, and the moisture-proof plate 11 due to the interference is avoided. Deformation and peeling will be prevented.
Further, even if the width of the gap 15 formed between the adjacent moisture-proof plates 11 changes due to such thermal expansion or displacement of the moisture-proof plate 11, the change in the width of the gap 15 is followed. Then, the gap moisture-proof portion 32 that closes the gap 15 prevents the intrusion of air containing moisture into the heat insulating layer A side, and the moisture-proof performance of the moisture-proof layer B is maintained.

The gap moisture-proof portion 32 is composed of a sealing portion 32a made of an elastic material that fills the gap 15 and a tape material 32b made of aluminum or the like that is attached so as to cover the outer surface side of the sealing portion 32a.
The sealing portion 32a is formed by filling the gap 15 with a sealing material that becomes an elastic body after curing, such as a silicon-based sealing material, an acrylic-based sealing material, or a polyurethane-based sealing material.

[Insulation and moisture proof panel 10]
As shown in FIGS. 2 and 3, the heat insulating board 12 laid on the outermost side of the heat insulating layer A and the moisture proof plate 11 constituting the moisture proof layer B provided on the outer surface thereof are provided with a heat insulating and moisture proof panel 10 described later. It is constructed by arranging a plurality of layers on the outer surface of the two-layer heat insulating board 13 laminated on the outside of the building frame 1.
Hereinafter, details of the heat insulating and moisture proof panel 10 will be described.

As shown in FIG. 4, the heat insulating and moisture-proof panel 10 has a substantially rectangular parallelepiped shape, and is a substantially rectangular parallelepiped heat insulating board 12 constituting the heat insulating layer A and a substantially rectangular shape covering the outer surface side of the heat insulating board 12. The moisture-proof plate 11 is integrated in advance. Further, in the heat insulating and moisture proof panel 10, the heat insulating board 12 has a close contact exposed surface 12b that is in close contact with the adjacent heat insulating board on the side surface of the outer peripheral portion thereof, and the moisture proof plate 11 has the outer peripheral portion along the in-plane direction. It is configured to retreat inward from the close contact exposed surface 12b.
Further, in the moisture-proof plate 11, insertion holes 11b through which the heat insulating anchor 30 is inserted are dispersedly formed in the in-plane direction.

Then, in the construction method of the external heat insulating structure 2, as shown in FIGS. 2 and 3, a plurality of heat insulating and moisture proof panels 10 are brought into close contact with each other on the outer surface of the building frame 1 while the close contact exposed surface 12b of the heat insulating board 12 is brought into close contact with each other. Multiple units will be installed side by side. Then, since the outer peripheral portion of the moisture-proof plate 11 is retired inward from the close contact exposed surface 12b formed on the outer peripheral portion of the heat insulating board 12, a gap 15 is formed between the moisture-proof plates 11 adjacent to each other. Next, by closing the gap 15 thus formed with the flexible gap moisture-proof portion 32, the heat insulating layer A is formed by the heat insulating board 12 of the heat insulating and moisture-proof panel 10, and the moisture-proof plate 11 and the gap moisture-proof portion are formed. The moisture-proof layer B is formed by 32.

Further, as shown in FIG. 4, in the heat insulating and moisture-proof panel 10, the moisture-proof plate 11 is formed in a substantially box shape having a bent portion 11a formed by bending four sides of the outer peripheral portion at right angles to one side. On the other hand, in the heat insulating board 12, the bent portion 11a of the moisture-proof plate 11 retreats inward from the close contact exposed surface 12b to form a gap 15 (see FIG. 5) at the edge of the outer peripheral portion on the moisture-proof plate 11 side. It is formed so as to have a fitting step portion 12a that can be fitted in the state.
The heat-insulating and moisture-proof panel 10 is configured by fitting the bent portion 11a of the moisture-proof plate 11 to the fitting step portion 12a of the heat-insulating board 12 with an adhesive appropriately interposed therein.

When the bent portion 11a of the moisture-proof plate 11 is fitted to the fitting step portion 12a of the heat insulating board 12 in this way, as shown in FIG. 5, the bent portion 11a of the moisture-proof plate 11 is exposed in close contact with the heat insulating board 12. It is in a state of being retired inward from the surface 12b. As a result, if a plurality of heat insulating and moisture proof panels 10 are arranged side by side on the outside of the heat insulating board 13 while keeping the close contact exposed surface 12b of the heat insulating board 12 in close contact with each other, between the bent portions 11a of the moisture proof plates 11 adjacent to each other. In addition, a uniform gap 15 is surely formed, and further, heat dissipation between adjacent heat insulating boards 12 is suppressed, so that excellent heat insulating performance is ensured.
The above is a description of the common configuration of the external heat insulating structure 2 configured as the side wall external heat insulating structure 2W and the roof external heat insulating structure 2L, and the configuration of the heat insulating and moisture proof panel 10 used in the external heat insulating structure 2. , The individual configurations of the side wall external heat insulating structure 2W and the roof external heat insulating structure 2L will be described in order below.

[Insulation structure outside the side wall 2W]
As shown in FIGS. 3 and 5, an outer wall material 20 is laid on the outdoor side of the side wall external heat insulating structure 2W. Further, the outer wall material 20 is provided at a position outwardly separated from the moisture-proof layer B of the side wall external heat insulating structure 2W, and an air layer 23 is formed between the outer wall material 20 and the moisture-proof layer B. ing. As a result, even when the outer wall material 20 becomes hot due to an increase in the outside air temperature, sunlight, etc., the heat is generated outside the side wall portion by the air layer 23 formed between the outer wall material 20 and the moisture-proof layer B. Transmission to the heat insulating structure 2W side is suppressed.

By suppressing the heat transfer from the outer wall material 20 to the side wall outer heat insulating structure 2W side in this way, the heat insulating performance of the building 100 can be improved, and the moisture-proof plate 11 constituting the moisture-proof layer B can be improved. Thermal expansion will be suppressed. As a result, the width of the gap 15 for avoiding interference between the moisture-proof plates 11 due to thermal expansion of the moisture-proof plate 11 can be set as small as possible, for example, about 5 mm. Since the width of the gap 15 is small, damage to the seal portion 32a and the gap moisture-proof portion 32 made of the tape material 32b due to insertion of a finger or a foreign object into the gap 15 can be avoided during construction.

The outer wall material 20 is supported by a steel frame material 21 fixed to the outside of the side wall portion 1W of the building frame 1. Further, the peripheral portion of the steel frame material 21 on the outer surface side of the side wall portion 1W is filled with a heat insulating material 22 such as urethane foam, whereby the heat insulating property at this portion is ensured.

[Insulation structure outside the roof 2L]
As shown in FIG. 2, on the outdoor side (upper side) of the moisture-proof layer B of the roof outer heat insulating structure 2L, a plurality of heat insulating boards 25 similar to the above-mentioned heat insulating boards 12 and 13 are arranged side by side. 2 The heat insulating layer C is provided. In this way, since the second heat insulating layer C is provided on the outside of the moisture proof layer B, it is possible to suppress the transfer of heat due to the rise in outside air temperature and sunlight to the moisture proof layer B side, and the heat insulating structure outside the roof portion. In addition to improving the heat insulating property of 2L, the thermal expansion of the moisture-proof plate 11 constituting the moisture-proof layer B is further suppressed. As a result, the width of the gap 15 for avoiding interference between the moisture-proof plates 11 due to thermal expansion of the moisture-proof plate 11 can be set as small as possible, for example, about 5 mm. Since the width of the gap 15 is small, damage to the seal portion 32a and the gap moisture-proof portion 32 made of the tape material 32b due to insertion of a finger or a foreign object into the gap 15 can be avoided during construction.

Further, on the outer surface of the second heat insulating layer C, a protective layer 26 such as an asphalt waterproof layer is constructed in order to prevent water from entering the roof outer heat insulating structure 2L side while ensuring the required strength of the roof surface. There is. In the roof outer heat insulating structure 2L, a waterproof base is appropriately provided between the roof 1L of the building frame 1 and the heat insulating layer A, so that water intrusion to the roof 1L side is surely prevented. There is. Further, by applying a highly reflective coating as a finish on the outer surface of the protective layer 26, the thermal expansion of the moisture-proof plate 11 due to solar radiation can be further suppressed.

[Another Embodiment]
(1) In the above embodiment, the gap moisture-proof portion 32 that follows the change in the width of the gap 15 formed between the adjacent moisture-proof plates 11 and closes the gap 15, the seal portion 32a that fills the gap 15, and the outside thereof. Although it is composed of a tape material 32b that covers the surface side, either one of the seal portion 32a and the tape material 32b may be omitted or a gap moisture proof portion having a different configuration may be omitted within the range in which the function of the gap moisture proof portion 32 is secured. You may adopt it.

(2) In the above embodiment, the second heat insulating layer C is provided outside the moisture-proof layer B only in the roof outer heat insulating structure 2L, but the second heat insulating layer C may be omitted as appropriate. Further, also in the side wall external heat insulating structure 2W, a second heat insulating layer may be provided on the outside of the moisture-proof layer B.

(3) In the above embodiment, a plurality of heat insulating and moisture proof panels 10 in which the heat insulating board 12 and the moisture proof plate 11 are integrated are arranged side by side on the outside of the building frame 1 to construct the external heat insulating structure 2. And the moisture-proof plate may be laid separately on the outside of the building frame 1 to construct the external heat insulating structure 2. In this case, a plurality of heat insulating boards are arranged side by side on the outer surface of the building frame while keeping the side surfaces of the heat insulating boards in close contact with each other, and a plurality of moisture proof boards are arranged side by side with a gap between the adjacent parts. A gap moisture-proof portion is provided for this gap.

1 Building frame 2 External insulation structure 2L Roof external insulation structure (external insulation structure)
2W side wall external insulation structure (external insulation structure)
10 Insulation / moisture proof panel 11 Moisture proof plate 11 Wet plate 11a Bent part 12 Insulation board 12a Fitting step part 12b Adhesion exposed surface 13 Insulation board 15 Gap 25 Second heat insulation layer 32 Gap moisture proof part 32a Seal part (gap moisture proof part)
32b Tape material (gap moisture proof part)
100 Building A Insulation layer B Moisture proof layer

Claims (4)

An external heat insulating structure including a heat insulating layer provided on the outside of the building frame and a moisture-proof layer provided on the outside of the heat insulating layer.
A plurality of metal plate-shaped moisture-proof plates in which the moisture-proof layers are arranged side by side with a gap between edges of adjacent ones, and a gap that closes the gap by following a change in the width of the gap. It is composed of a moisture-proof part,
An outer wall material is laid at a position separated outward from the moisture-proof layer, and an air layer is formed between the outer wall material and the moisture-proof layer.
The outer wall material is supported by a steel frame material fixed to the outer surface of the building frame.
A heat insulating material is filled around the steel frame material .
The heat insulating layer has a three-layer structure consisting of a two-layer heat insulating board and a one-layer heat insulating board in order from the building frame side, and the heat insulating board laid on the outermost side is integrated with the moisture-proof plate. It is provided as a heat insulating and moisture proof panel.
The heat-insulating and moisture-proof panel has an exposed contact surface that adheres to the adjacent heat-insulating board on the outer peripheral portion of the heat-insulating board, and the outer peripheral portion of the moisture-proof plate adheres to the outer peripheral portion of the outer surface of the building frame along the in-plane direction. External heat insulation structure that is constructed by retiring inside from the exposed surface. 2. Insulation structure. The external heat insulating portion according to claim 1 or 2 , wherein the gap moisture-proof portion is composed of a sealing portion made of an elastic material that fills the gap and a tape material attached so as to cover the outer surface side of the sealing portion. structure. The method for constructing an external heat insulating structure according to any one of claims 1 to 3 by laying a heat insulating layer on the outside of the building frame and laying a moisture proof layer on the outside of the heat insulating layer. There,
A heat insulating board having a close contact exposed surface in close contact with an adjacent heat insulating board on the outer peripheral portion, and a moisture-proof plate in which the outer peripheral portion is retired inward from the close contact exposed surface along the in-plane direction of the outer surface of the building frame. , Using a pre-integrated heat-insulating and moisture-proof panel,
The heat insulating layer has a three-layer structure including a two-layer heat insulating board and a one-layer heat insulating board in order from the building frame side, and the heat insulating board laid on the outermost side is provided as the heat insulating and moisture proof panel.
A plurality of the heat insulating and moisture proof panels are arranged side by side on the outer surface of the building skeleton while keeping the close contact exposed surface of the heat insulating board in close contact with each other adjacent to each other, and the moisture proof plate in the juxtaposed heat insulating and moisture proof panel. By closing the gap formed between those adjacent to each other with a flexible gap moisture-proof portion, the heat-insulating board constitutes the heat-insulating layer, and the moisture-proof plate and the gap-moisture-proof portion form the moisture-proof layer. Construction method of the external heat insulation structure that composes.

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