JP2018105041A

JP2018105041A - External heat insulation structure and construction method of the same

Info

Publication number: JP2018105041A
Application number: JP2016254014A
Authority: JP
Inventors: 大介見澤; Daisuke Misawa; 龍志富永; Tatsushi Tominaga; 章清水; Akira Shimizu; 石田　伸一; Shinichi Ishida; 伸一石田; 伊知郎中島; Ichiro Nakajima; 正秀橋口; Masahide Hashiguchi; 清二古野; Seiji Furuno; 田中　秀樹; Hideki Tanaka; 秀樹田中; 池田　康二; Koji Ikeda
Original assignee: HAYASHI HOREI KOGYO KK; Takenaka Komuten Co Ltd
Current assignee: HAYASHI HOREI KOGYO KK; Takenaka Komuten Co Ltd
Priority date: 2016-12-27
Filing date: 2016-12-27
Publication date: 2018-07-05
Anticipated expiration: 2036-12-27
Also published as: JP6941438B2

Abstract

PROBLEM TO BE SOLVED: To provide an external heat insulation structure constructed in a building skeleton such as refrigerating/freezing storage warehouse which prevents interference between adjacent moisture-proof plates and can avoid deformation and peeling by the interference, even when the moisture-proof plate constituting a moisture-proof layer is thermally expanded while securing moisture-proof performance of the moisture-proof layer.SOLUTION: An external heat insulation structure includes a heat insulation layer A provided outside of a building skeleton and a moisture-proof layer B provided outside of the heat insulation layer A, where the moisture-proof layer B is constituted of a plurality of metallic moisture-proof plates 11 which are aligned by providing a gap 15 between the adjacent plates, and a gap moisture-proof portion 32 blocking the gap 15 following the change in the width of the gap 15.SELECTED DRAWING: Figure 5

Description

本発明は、建物躯体の外側に設けられた断熱層と、当該断熱層の外側に設けられた防湿層とを備えた外断熱構造及びその施工方法に関する。 The present invention relates to an outer heat insulating structure including a heat insulating layer provided outside a building frame and a moisture-proof layer provided outside the heat insulating layer, and a construction method thereof.

冷蔵・冷凍倉庫などの建物躯体の断熱構造として、建物躯体の外側に断熱層を敷設する外断熱構造が知られている。かかる外断熱構造では、水分を含む空気が断熱層側に浸入すると、内部結露等により断熱性が低下することが懸念される。そこで、断熱層の外側には防湿層が設けられており、この防湿層により断熱層側への水分を含む空気の浸入が防止されている（例えば特許文献１及び２を参照。）。
そして、従来の建物躯体の外断熱構造において、防湿層は、金属製板状の防湿板を、隣接間で互いに密着する状態で複数並設して構成されている。 As a heat insulation structure of a building frame such as a refrigerator / freezer warehouse, an external heat insulating structure in which a heat insulating layer is laid outside the building frame is known. In such an outer heat insulating structure, there is a concern that when air containing moisture enters the heat insulating layer side, the heat insulating property is deteriorated due to internal condensation or the like. Therefore, a moisture-proof layer is provided outside the heat-insulating layer, and the moisture-proof layer prevents intrusion of air containing moisture into the heat-insulating layer (see, for example, Patent Documents 1 and 2).
And in the conventional heat insulation structure of a conventional building frame, the moisture-proof layer is configured by arranging a plurality of metal plate-like moisture-proof plates side by side in close contact with each other.

特に、特許文献２に記載の外断熱構造は、断熱層として機能する断熱ボード（５Ａ）と防湿層として機能する金属製板状の防湿板（５ａ）とを一体化してなる断熱防湿パネル（Ｐ）を、建物躯体（３）の外側に複数並設して構成されている。更に、この外断熱構造で利用される断熱防湿パネル（Ｐ）は、両端縁部がホゾ組形状に形成された断熱ボード（５Ａ）の外表面に防湿板（５ａ）を積層し、その防湿板（５ａ）の端部を断熱ボード（５Ａ）の厚肉内に折り返し埋設させる形態で構成されている。そして、このように構成された断熱防湿パネル（Ｐ）を建物躯体（３）の外側に複数並設するにあたり、断熱ボード（５Ａ）のホゾ溝（７）に対して隣接する断熱ボード（５Ａ）のホゾ（８）が嵌合されることで、双方の断熱ボード（５Ａ）の端部で折り返された防湿板（５ａ）同士が互いに密着することになる。 In particular, the outer heat insulating structure described in Patent Document 2 is a heat insulating moisture-proof panel (P) in which a heat insulating board (5A) functioning as a heat insulating layer and a metal plate-shaped moistureproof plate (5a) functioning as a moistureproof layer are integrated. ) Are arranged in parallel on the outside of the building frame (3). Further, the heat and moisture barrier panel (P) used in the outer heat insulating structure is formed by laminating a moisture barrier plate (5a) on the outer surface of the heat insulating board (5A) having both side edges formed in a horn-like shape. The end portion of (5a) is configured to be embedded in the thick wall of the heat insulating board (5A). And in arranging a plurality of heat-insulation and moisture-proof panels (P) thus configured on the outside of the building housing (3), the heat-insulating board (5A) adjacent to the groove (7) of the heat-insulating board (5A) When the tenon (8) is fitted, the moisture-proof plates (5a) folded back at the ends of both heat insulating boards (5A) are brought into close contact with each other.

特開昭６３−０４１７８４号公報JP 63-041784 A 特開２００８−１６３６７１号公報JP 2008-163671 A

建物躯体の外断熱構造において、断熱層の外側に設けられる防湿板は、外気温の上昇や日射等により、昇温し熱膨張しやすい状態となる。よって、上述した特許文献１及び２に記載の従来の外断熱構造のように、金属製板状の防湿板が隣接間で互いに密着する状態で複数併設されている場合には、熱膨張や他の要因により、隣接する防湿板同士が互いに押し付けあって干渉し、結果、防湿板の変形や断熱層からの剥離が発生し、防湿層の防湿性能が損なわれるという問題が生じる。 In the outer heat insulating structure of the building frame, the moisture barrier plate provided on the outer side of the heat insulating layer is in a state where it easily rises in temperature due to a rise in outside air temperature, solar radiation, or the like. Therefore, as in the conventional outer heat insulating structures described in Patent Documents 1 and 2 described above, when a plurality of metal moisture barrier plates are provided side by side in close contact with each other, thermal expansion or other Due to this factor, adjacent moisture-proof plates are pressed against each other and interfere with each other. As a result, the moisture-proof plate is deformed or peeled off from the heat insulating layer, resulting in a problem that the moisture-proof performance of the moisture-proof layer is impaired.

この実情に鑑み、本発明の主たる課題は、冷蔵・冷凍倉庫等の建物躯体に対して構築される外断熱構造において、隣接する防湿板同士の熱膨張等による干渉を回避して、当該干渉による防湿板の変形や剥離を防止し、防湿層の防湿性能を維持することができる技術を提供する点にある。 In view of this situation, the main problem of the present invention is to avoid interference due to thermal expansion or the like between adjacent moisture barrier plates in an outer heat insulating structure constructed for a building frame such as a refrigeration / freezer warehouse. This is to provide a technique capable of preventing the moisture-proof plate from being deformed or peeled off and maintaining the moisture-proof performance of the moisture-proof layer.

本発明の第１特徴構成は、建物躯体の外側に設けられた断熱層と、当該断熱層の外側に設けられた防湿層とを備えた外断熱構造であって、
前記防湿層が、隣接間に隙間を設けて複数並設された金属製板状の防湿板と、前記隙間の幅の変化に追従して当該隙間を塞ぐ隙間防湿部とで構成されている点にある。 The first characteristic configuration of the present invention is an outer heat insulating structure including a heat insulating layer provided on the outside of the building housing and a moisture-proof layer provided on the outer side of the heat insulating layer,
The moisture-proof layer is configured by a metal plate-like moisture-proof plate arranged in parallel with a gap between adjacent ones, and a gap moisture-proof portion that closes the gap by following a change in the width of the gap. It is in.

本構成によれば、断熱層の外側に設けられた防湿層において、複数並設された金属製板状の防湿板の隣接間に隙間が設けられているので、当該防湿板が外気温の上昇や日射等により熱膨張した場合や他の要因で面内方向に変位した場合であっても、隣接する防湿板同士の干渉を上記隙間にて回避することができる。更に、このような防湿板の熱膨張や変位等に起因して、防湿板の隣接間に形成された隙間の幅が変化する場合であっても、隙間の幅の変化に追従して当該隙間を塞ぐ隙間防湿部により、断熱層側への水分を含む空気の浸入を防止することができる。
従って、本発明により、隣接する防湿板同士の熱膨張等による干渉を回避して、当該干渉による防湿板の変形や剥離を防止し、防湿層の防湿性能を維持することができる外断熱構造を提供することができる。 According to this configuration, in the moisture-proof layer provided on the outside of the heat-insulating layer, a gap is provided between adjacent metal plate-like moisture-proof plates arranged side by side. Interference between adjacent moisture-proof plates can be avoided in the gap even when thermal expansion is caused by solar radiation or the like, or when it is displaced in the in-plane direction due to other factors. Furthermore, even if the width of the gap formed between adjacent moisture barrier plates changes due to such thermal expansion and displacement of the moisture barrier plate, the gaps follow the change in the gap width. By the gap moisture-proof part that closes the air, it is possible to prevent the intrusion of air containing moisture into the heat insulating layer side.
Therefore, according to the present invention, there is provided an outer heat insulating structure capable of avoiding interference due to thermal expansion or the like between adjacent moisture barrier plates, preventing deformation and peeling of the moisture barrier plate due to the interference, and maintaining moisture resistance of the moisture barrier layer. Can be provided.

本発明の第２特徴構成は、前記断熱層と前記防湿層とが、前記断熱層を構成する断熱ボードと前記防湿板とを一体化してなる断熱防湿パネルを前記建物躯体の外側に複数並設して構成され、
前記断熱防湿パネルが、前記断熱ボードの外周部に、隣接する断熱ボードに密着する密着露出面を有すると共に、前記防湿板の外周部を面内方向に沿って前記密着露出面よりも内側に引退させて構成されている点にある。 According to a second characteristic configuration of the present invention, the heat insulating layer and the moisture proof layer are provided in parallel with a plurality of heat and moisture proof panels formed by integrating the heat insulating board and the moisture proof plate constituting the heat insulating layer on the outside of the building housing. Configured,
The heat and moisture barrier panel has a close contact exposed surface in close contact with an adjacent heat insulating board on an outer peripheral portion of the heat insulating board, and the outer peripheral portion of the moistureproof plate is retracted inward from the close contact exposed surface along an in-plane direction. The point is that they are configured.

本構成によれば、断熱ボードと防湿板とを一体化してなる断熱防湿パネルにおいて、防湿板の外周部が断熱ボードの外周部に形成された密着露出面よりも内側に引退しているので、その断熱防湿パネルを隣接間で断熱ボードの密着露出面を密着させながら建物躯体の外側に複数並設するという簡単な作業によって、防湿板の隣接間に隙間を確実に形成しながら断熱ボードの隣接間での放熱を抑制して優れた断熱性能を確保する状態で、外断熱構造の断熱層と防湿層とを構築することができる。 According to this configuration, in the heat and moisture barrier panel formed by integrating the heat insulation board and the moisture barrier plate, the outer periphery of the moisture barrier plate is retracted inward from the contact exposed surface formed in the outer periphery of the heat insulation board. Adjacent to the insulation board while forming a gap between the moisture-proof boards by a simple operation of arranging a plurality of the insulation and moisture-proof panels on the outside of the building frame while adhering the exposed exposed surface of the insulation board between adjacent ones. The heat insulating layer and the moisture-proof layer of the outer heat insulating structure can be constructed in a state in which the heat dissipation between them is suppressed and excellent heat insulating performance is ensured.

本発明の第３特徴構成は、前記防湿板が、外周部に折曲部を有し、
前記断熱ボードが、外周部の前記防湿板側の縁部に、前記防湿板の折曲部が前記密着露出面よりも内側に引退して隙間を形成する状態で嵌合可能な嵌合段部を有し、
前記断熱防湿パネルが、前記断熱ボードの嵌合段部に前記防湿板の折曲部を嵌合させて構成されている点にある。 In the third feature configuration of the present invention, the moisture-proof plate has a bent portion on an outer peripheral portion,
The heat insulating board can be fitted to the edge of the outer peripheral portion on the moisture-proof plate side so that the bent portion of the moisture-proof plate is retracted to the inner side of the contact exposed surface to form a gap. Have
The heat and moisture barrier panel is configured by fitting a bent portion of the moisture barrier plate to a fitting step portion of the heat insulating board.

本構成によれば、断熱ボードの外周部の縁部に形成された嵌合段部に対して、防湿板の外周部に設けられた折曲部を嵌合させる形態で、防湿板の折曲部を断熱ボードの密着露出面よりも確実に内側に引退させながら、断熱ボードと防湿板とを安定且つ強固に一体化させて、平面度が高い断熱防湿パネルを製作することができる。
よって、断熱ボードと防止板との経年劣化による接着力低下や温度変化による挙動に起因した防湿板の剥離や変形を防止することができ、更には、このような断熱防湿パネルを建物躯体の外側に複数並設することで、互いに隣接する防湿板の折曲部の間に安定して均一な隙間を形成しながら、当該並設された複数の断熱防湿パネルにより構築された断熱層及び防湿層の不陸を抑制することができる。 According to this configuration, the bent portion of the moisture-proof plate is fitted in a form in which the bent portion provided on the outer peripheral portion 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. The insulating board and the moisture-proof plate can be stably and firmly integrated with each other while the part is reliably retracted to the inner side than the tightly exposed surface of the insulating board, and an insulating moisture-proof panel with high flatness can be manufactured.
Therefore, it is possible to prevent the moisture-proof plate from peeling or deforming due to a decrease in adhesive strength due to aging deterioration between the heat-insulating board and the prevention plate or a behavior due to temperature change. The heat insulating layer and the moisture proof layer constructed by the plurality of the heat proof and moisture proof panels arranged side by side while forming a uniform and uniform gap between the bent portions of the moisture proof plates adjacent to each other. Can be suppressed.

本発明の第４特徴構成は、前記防湿層の外側に第２断熱層を設けた点にある。 The 4th characteristic structure of this invention exists in the point which provided the 2nd heat insulation layer in the outer side of the said moisture-proof layer.

本構成によれば、防湿層の外側に第２断熱層が設けられているので、外気温の上昇や日射等による熱が第２断熱層側から防湿層側に伝達されることを抑制することができる。これにより、防湿層を構成する防湿板の熱膨張が抑制されるので、その熱膨張による防湿板同士の干渉を回避するための隙間の幅を極力小さくして、当該隙間への指や異物の挿入による隙間防湿部の損傷を回避することができる。 According to this structure, since the 2nd heat insulation layer is provided in the outer side of a moisture-proof layer, it suppresses that the heat | fever by a raise of external temperature, solar radiation, etc. is transmitted from the 2nd heat insulation layer side to the moisture-proof layer side. Can do. As a result, the thermal expansion of the moisture barrier plates constituting the moisture barrier layer is suppressed, so the width of the gap for avoiding interference between the moisture barrier plates due to the thermal expansion is made as small as possible so that fingers and foreign objects in the gap can be prevented. Damage to the gap moisture-proof portion due to insertion can be avoided.

本発明の第５特徴構成は、建物躯体の外側に断熱層を敷設し、当該断熱層の外側に防湿層を敷設する外断熱構造の施工方法であって、
外周部に密着露出面を有する断熱ボードと、外周部を面内方向に沿って前記密着露出面よりも内側に引退させた防湿板とを、予め一体化してなる断熱防湿パネルを用い、
当該断熱防湿パネルの複数を、隣接間において前記断熱ボードの密着露出面を密着させながら建物躯体の外表面に並設すると共に、当該並設された断熱防湿パネルにおける前記防湿板の隣接間に形成される隙間を可撓性の隙間防湿部で塞ぐことで、前記断熱ボードで前記断熱層を構成すると共に、前記防湿板及び前記隙間防湿部で前記防湿層を構成する点にある。 A fifth characteristic configuration of the present invention is a construction method of an outer heat insulating structure in which a heat insulating layer is laid on the outside of a building frame and a moisture proof layer is laid on the outer side of the heat insulating layer,
Using a heat-insulation and moisture-proof panel obtained by integrating in advance a heat insulating board having a close-contact exposed surface on the outer periphery and a moisture-proof plate whose inner periphery is retracted inward from the close-contact exposed surface along the in-plane direction,
A plurality of the heat and moisture barrier panels are juxtaposed on the outer surface of the building frame while closely adhering the exposed exposed surface of the heat insulating board between adjacent ones, and formed between the moisture barrier plates adjacent to the heat insulating and moisture barrier panels arranged side by side. By closing the gap to be formed with a flexible gap moisture-proof part, the heat insulation board constitutes the heat insulation layer, and the moisture barrier plate and the gap moisture prevention part constitute the moisture barrier layer.

本構成によれば、断熱ボードと防湿板とを一体化してなる断熱防湿パネルにおいて、防湿板の外周部が断熱ボードの外周部に形成された密着露出面よりも内側に引退しているので、その断熱防湿パネルを隣接間で断熱ボードの密着露出面を密着させながら建物躯体の外側に複数並設するという簡単な作業によって、複数並設された防湿板の隣接間に隙間を確実に形成しながら断熱ボードの隣接間での放熱を抑制して優れた断熱性能を確保する状態で、外断熱構造の断熱層と防湿層とを構築することができる。
そして、このように構築された外断熱構造において、複数並設された金属製板状の防湿板の隣接間に隙間が設けられることになるので、当該防湿板が外気温の上昇や日射等により熱膨張した場合や他の要因で面内方向に変位した場合であっても、隣接する防湿板同士の干渉を上記隙間にて回避することができる。更に、このような防湿板の熱膨張や変位等に起因して、防湿板の隣接間に形成された隙間の幅が変化する場合であっても、隙間の幅の変化に追従して当該隙間を塞ぐ隙間防湿部により、断熱層側への水分を含む空気の浸入を防止することができる。
従って、本発明により、隣接する防湿板同士の熱膨張等による干渉を回避して、当該干渉による防湿板の変形や剥離を防止し、防湿層の防湿性能を維持することができる外断熱構造の施工方法を提供することができる。 According to this configuration, in the heat and moisture barrier panel formed by integrating the heat insulation board and the moisture barrier plate, the outer periphery of the moisture barrier plate is retracted inward from the contact exposed surface formed in the outer periphery of the heat insulation board. With the simple operation of arranging a plurality of the heat and moisture barrier panels on the outside of the building frame while adhering the exposed exposed surface of the heat insulation board between adjacent ones, a gap is surely formed between adjacent moisture barrier plates. However, it is possible to construct the heat insulating layer and the moisture-proof layer of the outer heat insulating structure in a state in which heat dissipation between the adjacent heat insulating boards is suppressed and excellent heat insulating performance is ensured.
And in the outer heat insulating structure constructed in this way, a gap is provided between adjacent metal plate moistureproof plates arranged side by side, so that the moistureproof plate is caused by an increase in outside air temperature, solar radiation, etc. 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 in the gap. Furthermore, even if the width of the gap formed between adjacent moisture barrier plates changes due to such thermal expansion and displacement of the moisture barrier plate, the gaps follow the change in the gap width. By the gap moisture-proof part that closes the air, it is possible to prevent the intrusion of air containing moisture into the heat insulating layer side.
Therefore, according to the present invention, it is possible to avoid interference due to thermal expansion or the like between adjacent moisture barrier plates, to prevent deformation and peeling of the moisture barrier plates due to the interference, and to maintain the moistureproof performance of the moisture barrier layer. A construction method can be provided.

建物躯体の外断熱構造を説明する図Illustration explaining the outer heat insulation structure of the building frame 建物躯体の屋根部に構築される外断熱構造の構成を示す概略断面図Schematic sectional view showing the structure of the outer heat insulation structure built on the roof of the building frame 建物躯体の側壁部に構築される外断熱構造の構成を示す概略断面図Schematic sectional view showing the structure of the outer heat insulation structure built on the side wall of the building frame 断熱防湿パネルの構成を示す分解斜視図Exploded perspective view showing the configuration of the heat and moisture barrier panel 建物躯体の側壁部に構築される外断熱構造の部分拡大断面図Partial enlarged sectional view of the outer heat insulation structure built on the side wall of the building frame

本発明に係る外断熱構造及びその施工方法の実施形態について図面に基づいて説明する。
図１に示すように、本実施形態の外断熱構造２は、冷蔵・冷凍倉庫などに利用される建物１００において、鉄筋コンクリート造の建物躯体１の屋外側を断熱するものとして構築されている。外断熱構造２としては、屋外から建物躯体１の側壁部１Ｗへの伝熱を抑制するために当該側壁部１Ｗの屋外側（図４及び図５では側壁部１Ｗの右側が屋外側となる。）に構築された側壁部外断熱構造２Ｗと、屋外から建物躯体１の屋根部１Ｌへの伝熱を抑制するために当該屋根部１Ｌの屋外側（図２では屋根部１Ｌの上方側が屋外側となる。）に構築された屋根部外断熱構造２Ｌが設けられている。 Embodiments of an outer heat insulating structure and a construction method thereof according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the outer 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 refrigerated warehouse or the like. As the outer heat insulating structure 2, in order to suppress heat transfer from the outside to the side wall 1W of the building housing 1, the side of the side wall 1W is the outdoor side (in FIG. 4 and FIG. 5, the right side of the side wall 1W is the outdoor side). In order to suppress heat transfer from the outside to the roof portion 1L of the building housing 1, the outside side of the roof portion 1L (in FIG. 2, the upper side of the roof portion 1L is the outdoor side) The roof outer heat insulating structure 2L constructed in the above is provided.

更に、地盤に接触する建物躯体１の１階床スラブ１Ｆの内側には、地盤から当該１階床スラブ１Ｆを介して建物１００の内部への伝熱を抑制するために床断熱構造２Ｆが構築されている。そして、これら断熱構造２Ｗ，２Ｌ，２Ｆにより、建物１００の内部が屋外及び地盤に対して断熱されることになる。 Furthermore, a floor heat insulation structure 2F is constructed inside the first floor slab 1F of the building frame 1 that contacts the ground to suppress heat transfer from the ground to the inside of the building 100 via the first floor slab 1F. Has been. And the inside of the building 100 is thermally insulated from the outdoors and the ground by these heat insulating structures 2W, 2L, 2F.

〔外断熱構造２〕
以下、側壁部外断熱構造２Ｗや屋根部外断熱構造２Ｌとして構成される外断熱構造２の共通の構成について説明を加える。
外断熱構造２は、図２及び図３に示すように、建物躯体１の外側に敷設された断熱層Ａと、当該断熱層Ａの外側に敷設された防湿層Ｂとを備える。
断熱層Ａは、断熱ボード１２，１３を建物躯体１の外表面において複数並設して構成されている。尚、断熱ボード１２，１３を構成する断熱材は、断熱性を有するものであれば適宜利用することができるが、例えば、ポリウレタン発泡体、ポリスチレン発泡体、ガラスウール等の高断熱性材料を利用することができる。
また、本実施形態において、断熱層Ａは、建物躯体１側から順に２層の断熱ボード１３と１層の断熱ボード１２とからなる３層構造を有する。尚、詳細については後述するが、最も外側に敷設される断熱ボード１２は、その外表面に設けられる防湿板１１と一体化された断熱防湿パネル１０として設けられている。
また、これら断熱ボード１３及び断熱防湿パネル１０は、建物躯体１の外側において複数並設して積層するにあたり、同一箇所に継ぎ目が重ならないように千鳥状に配置されている。 [Outside heat insulation structure 2]
Hereinafter, the common configuration of the outer heat insulating structure 2 configured as the side wall outer heat insulating structure 2W and the roof outer heat insulating structure 2L will be described.
As shown in FIGS. 2 and 3, the outer heat insulating structure 2 includes a heat insulating layer A laid outside the building housing 1 and a moisture-proof layer B laid outside 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 housing 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. For example, a high heat insulating material such as polyurethane foam, polystyrene foam, glass wool or the like is used. can do.
Moreover, in this embodiment, the heat insulation layer A has a three-layer structure which consists of the two-layer heat insulation board 13 and the one-layer heat insulation board 12 in order from the building housing 1 side. In addition, although mentioned later for details, the heat insulation board 12 laid out on the outermost side is provided as the heat insulation moisture-proof panel 10 integrated with the moisture-proof board 11 provided in the outer surface.
Further, when a plurality of the heat insulation boards 13 and the heat and moisture proof panels 10 are arranged side by side on the outside of the building housing 1 and stacked, the heat insulation boards 13 and the heat and moisture proof panels 10 are arranged in a staggered manner so that the seams do not overlap at the same place.

一方、防湿層Ｂは、非通気性を有しており、かかる防湿層Ｂを断熱層Ａの外側に設けることで、断熱層Ａ側への水分を含む空気の浸入が回避されて、断熱層Ａ側での内部結露による断熱性の低下が防止されている。
尚、建物躯体１への断熱層Ａ並びに防湿層Ｂの固定は、断熱性を有する公知の断熱アンカー３０を貫通させ建物躯体１に打ち込むことで行われている。また、防湿層Ｂの外表面に露出される断熱アンカー３０の頭部には、それを覆う形態でアルミニウム製のテープ材３３が貼着されており、これにより、断熱アンカー３０の貫通部を介した水分を含む空気の浸入が防止されている。即ち、このテープ材３３についても防湿層Ｂとして機能することになる。 On the other hand, the moisture-proof layer B is non-breathable, and by providing the moisture-proof layer B outside the heat insulating layer A, infiltration of air containing moisture into the heat insulating layer A side is avoided, and the heat insulating layer A decrease in heat insulation due to internal condensation on the A side is prevented.
In addition, fixation of the heat insulation layer A and the moisture-proof layer B to the building case 1 is performed by penetrating a known heat insulation anchor 30 having heat insulating properties into the building case 1. Moreover, the tape material 33 made from aluminum is stuck to the head of the heat insulation anchor 30 exposed on the outer surface of the moisture-proof layer B so as to cover it, and thereby, through the penetration portion of the heat insulation anchor 30. Intrusion of air containing moisture is prevented. That is, the tape material 33 also functions as the moisture-proof layer B.

防湿層Ｂは、図２，図３，及び図５に示すように、隣接間に隙間１５を設けて複数並設されたアルミニウム製鋼板、ステンレス製鋼板、アルミ亜鉛合金メッキ鋼板などの金属製板状の防湿板１１と、この隙間１５の幅の変化に追従して当該隙間１５を塞ぐ隙間防湿部３２とで構成されている。ここで、防湿板１１が金属板で構成されているので、アルミ箔等を利用する場合と比べて傷が付き難く高強度となり、例えば屋根部外断熱構造２Ｌの防湿板１１として利用した場合でも、歩行に耐え得る強度を発揮させることができる。 As shown in FIGS. 2, 3, and 5, the moisture-proof layer B is made of a metal plate such as an aluminum steel plate, a stainless steel plate, or an aluminum zinc alloy plated steel plate provided with a plurality of gaps 15 adjacent to each other. And a gap moisture-proof portion 32 that closes the gap 15 following the change in the width of the gap 15. Here, since the moisture-proof plate 11 is made of a metal plate, the moisture-proof plate 11 is less likely to be scratched and stronger than when using an aluminum foil or the like. For example, even when the moisture-proof plate 11 is used as the moisture-proof plate 11 of the outside heat insulating structure 2L. The strength that can withstand walking can be exhibited.

即ち、断熱層Ａの外側に設けられた防湿層Ｂにおいて、複数並設された金属製板状の防湿板１１の隣接間に隙間１５が設けられているので、当該防湿板１１が外気温の上昇や日射等により熱膨張した場合や他の要因で面内方向に変位した場合であっても、隣接する防湿板１１同士の干渉が上記隙間１５にて回避されて、当該干渉による防湿板１１の変形や剥離が防止されることになる。
更に、このような防湿板１１の熱膨張や変位等に起因して、防湿板１１の隣接間に形成された隙間１５の幅が変化する場合であっても、隙間１５の幅の変化に追従して当該隙間１５を塞ぐ隙間防湿部３２により、断熱層Ａ側への水分を含む空気の浸入が防止されて、防湿層Ｂの防湿性能が維持されることになる。 That is, in the moisture-proof layer B provided outside the heat-insulating layer A, the gap 15 is provided between adjacent metal plate-like moisture-proof plates 11 arranged side by side. Even in the case of thermal expansion due to rising, solar radiation, or the like, or in the case of displacement in the in-plane direction due to other factors, interference between adjacent moisture-proof plates 11 is avoided by the gap 15 and the moisture-proof plate 11 due to the interference is avoided. This prevents deformation and peeling of the film.
Further, even when the width of the gap 15 formed between adjacent moistureproof plates 11 changes due to such thermal expansion and displacement of the moistureproof plate 11, the change in the width of the gap 15 is followed. Thus, the gap moisture-proof portion 32 that closes the gap 15 prevents the moisture-containing air from entering the heat insulating layer A, and the moisture-proof performance of the moisture-proof layer B is maintained.

隙間防湿部３２は、隙間１５を埋める弾性材料からなるシール部３２ａと、そのシール部３２ａの外表面側を覆う形態で貼着されたアルミニウム製等のテープ材３２ｂとで構成されている。
尚、シール部３２ａは、シリコン系シーリング材、アクリル系シーリング材、ポリウレタン系シーリング材などのような硬化後に弾性体となるシーリング材を隙間１５に充填することで形成される。 The gap moisture-proof part 32 is composed of a seal part 32a made of an elastic material that fills the gap 15, and a tape material 32b made of aluminum or the like attached in a form covering the outer surface side of the seal part 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 sealing material, an acrylic sealing material, a polyurethane sealing material, or the like.

〔断熱防湿パネル１０〕
図２及び図３に示すように、断熱層Ａにおいて最も外側に敷設される断熱ボード１２と、その外表面に設けられる防湿層Ｂを構成する防湿板１１とは、後述する断熱防湿パネル１０を建物躯体１の外側に積層された２層の断熱ボード１３の外表面に複数並設することで構築されている。
以下、この断熱防湿パネル１０の詳細について説明を加える。 [Insulation moisture barrier panel 10]
As shown in FIGS. 2 and 3, the heat insulation board 12 laid on the outermost side in the heat insulation layer A and the moisture prevention plate 11 constituting the moisture prevention layer B provided on the outer surface of the insulation board 12 are described later. A plurality of heat insulation boards 13 stacked on the outside of the building housing 1 are arranged in parallel on the outer surface.
The details of the heat and moisture barrier panel 10 will be described below.

図４に示すように、断熱防湿パネル１０は、略直方体の形状を有しており、断熱層Ａを構成する略直方体の断熱ボード１２と、その断熱ボード１２の外表面側を覆う略長方形の防湿板１１とを、予め一体化して構成されている。更に、この断熱防湿パネル１０において、断熱ボード１２は、その外周部の側面に、隣接する断熱ボードに密着する密着露出面１２ｂを有すると共に、防湿板１１は、その外周部を面内方向に沿って密着露出面１２ｂよりも内側に引退させて構成されている。
また、防湿板１１には、断熱アンカー３０が挿通する挿通孔１１ｂが面内方向に分散形成されている。 As shown in FIG. 4, the heat and moisture proof panel 10 has a substantially rectangular parallelepiped shape, and has a substantially rectangular parallelepiped heat insulation board 12 constituting the heat insulation layer A and a substantially rectangular shape covering the outer surface side of the heat insulation board 12. The moisture barrier plate 11 is integrated in advance. Further, in the heat and moisture barrier panel 10, the heat insulating board 12 has a close-contact exposed surface 12 b in close contact with the adjacent heat insulating board on the side surface of the outer peripheral portion, and the moistureproof plate 11 has an outer peripheral portion along the in-plane direction. Thus, it is configured to be retracted inward from the contact exposed surface 12b.
Further, the moistureproof plate 11 is formed with insertion holes 11b through which the heat insulating anchors 30 are inserted in a distributed manner in the in-plane direction.

そして、外断熱構造２の施工方法では、図２及び図３に示すように、断熱防湿パネル１０の複数を隣接間において断熱ボード１２の密着露出面１２ｂを密着させながら建物躯体１の外表面に複数並設する。すると、防湿板１１の外周部が断熱ボード１２の外周部に形成された密着露出面１２ｂよりも内側に引退していることから、防湿板１１の隣接間に隙間１５が形成される。次に、このように形成された隙間１５を可撓性の隙間防湿部３２により塞ぐことにより、断熱防湿パネル１０の断熱ボード１２で断熱層Ａが構成されると共に、防湿板１１及び隙間防湿部３２で防湿層Ｂが構成されることになる。 And in the construction method of the outer heat insulation structure 2, as shown in FIG.2 and FIG.3, while adhering the contact | adherence exposed surface 12b of the heat insulation board 12 in the space | interval between two or more of the heat insulation moisture-proof panels 10, on the outer surface of the building frame 1 Multiple units are installed side by side. Then, since the outer peripheral part of the moisture-proof board 11 has retreated inside the contact | adherence exposure surface 12b formed in the outer peripheral part of the heat insulation board 12, the clearance gap 15 is formed between the moisture-proof boards 11 adjacent. Next, the gap 15 formed in this way is closed by a flexible gap moisture-proof portion 32, whereby the heat insulation layer A is constituted by the heat insulation board 12 of the heat insulation moisture prevention panel 10, and the moisture prevention plate 11 and the gap moisture prevention portion. 32 constitutes the moisture-proof layer B.

更に、図４に示すように、断熱防湿パネル１０において、防湿板１１は、外周部の四方を一方側に直角に折り曲げてなる折曲部１１ａを有する略箱状に形成されている。一方、断熱ボード１２は、外周部の防湿板１１側の縁部に、防湿板１１の折曲部１１ａが密着露出面１２ｂよりも内側に引退して隙間１５（図５を参照）を形成する状態で嵌合可能な嵌合段部１２ａを有するように形成されている。
そして、断熱防湿パネル１０は、適宜接着剤を間に介在させた状態で、断熱ボード１２の嵌合段部１２ａに防湿板１１の折曲部１１ａを嵌合させて構成されている。 Further, as shown in FIG. 4, in the heat and moisture proof panel 10, the moisture proof plate 11 is formed in a substantially box shape having bent portions 11 a 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 is retracted to the inner side of the close contact exposed surface 12b at the edge of the outer peripheral portion on the moisture-proof plate 11 side to form a gap 15 (see FIG. 5). It is formed to have a fitting step 12a that can be fitted in a state.
The heat and moisture barrier panel 10 is configured by fitting the bent portion 11a of the moisture barrier plate 11 to the fitting step portion 12a of the heat insulating board 12 with an appropriate adhesive interposed therebetween.

このように断熱ボード１２の嵌合段部１２ａに防湿板１１の折曲部１１ａを嵌合させると、図５に示すように、防湿板１１の折曲部１１ａは、断熱ボード１２の密着露出面１２ｂよりも内側に引退された状態となる。このことで、複数の断熱防湿パネル１０を隣接間で断熱ボード１２の密着露出面１２ｂを密着させながら断熱ボード１３の外側に並設すれば、互いに隣接する防湿板１１の折曲部１１ａの間には、均一な隙間１５が確実に形成されることになり、更には断熱ボード１２の隣接間での放熱が抑制されて、優れた断熱性能が確保される状態になる。
以上が、側壁部外断熱構造２Ｗや屋根部外断熱構造２Ｌとして構成される外断熱構造２の共通の構成及びその外断熱構造２で利用される断熱防湿パネル１０の構成についての説明であるが、以下に、側壁部外断熱構造２Ｗ及び屋根部外断熱構造２Ｌの個別の構成について順に説明を加える。 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, the bent portion 11a of the moisture-proof plate 11 is exposed to the heat-insulating board 12 as shown in FIG. It will be in the state retreated inside the surface 12b. In this way, if a plurality of heat-insulating and moisture-proof panels 10 are arranged side by side outside the heat-insulating board 13 while closely adhering the close-contact exposed surface 12b of the heat-insulating board 12 between adjacent ones, between the bent portions 11a of the moisture-proof plates 11 adjacent to each other. In this case, the uniform gap 15 is surely formed, and further, heat radiation between adjacent heat insulation boards 12 is suppressed, and excellent heat insulation performance is ensured.
Although the above is description about the structure of the heat insulation moisture-proof panel 10 utilized with the common structure of the outer heat insulation structure 2 comprised as the side wall part heat insulation structure 2W and the roof part outer heat insulation structure 2L, and the outer heat insulation structure 2. In the following, the individual configurations of the side wall outer heat insulating structure 2W and the roof outer heat insulating structure 2L will be described in order.

〔側壁部外断熱構造２Ｗ〕
図３及び図５に示すように、側壁部外断熱構造２Ｗの更に屋外側には、外壁材２０が敷設されている。更に、外壁材２０は、側壁部外断熱構造２Ｗの防湿層Ｂに対して外方に離間した位置に設けられており、外壁材２０と防湿層Ｂとの間には空気層２３が形成されている。このことで、外壁材２０が外気温の上昇や日射等により高温になる場合であっても、外壁材２０と防湿層Ｂとの間に形成された空気層２３により、その熱が側壁部外断熱構造２Ｗ側に伝達されることが抑制される。 [Outside heat insulation structure on side wall 2W]
As shown in FIGS. 3 and 5, the outer wall material 20 is laid on the outdoor side of the side wall portion outer heat insulating structure 2 </ b> W. Further, the outer wall material 20 is provided at a position spaced outward from the moisture-proof layer B of the sidewall outer heat insulating structure 2W, and an air layer 23 is formed between the outer wall material 20 and the moisture-proof layer B. ing. Thus, even when the outer wall material 20 becomes hot due to an increase in the outside air temperature, solar radiation, or the like, 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.

そして、このように外壁材２０から側壁部外断熱構造２Ｗ側への熱伝達が抑制されていることで、建物１００の断熱性能の向上が図られると共に、防湿層Ｂを構成する防湿板１１の熱膨張が抑制されることになる。このことで、防湿板１１の熱膨張による防湿板１１同士の干渉を回避するための隙間１５の幅を例えば５ｍｍ程度と極力小さく設定することができる。そして、隙間１５の幅が小さいことで、施工時において、当該隙間１５への指や異物の挿入によるシール部３２ａやテープ材３２ｂからなる隙間防湿部３２の損傷が回避されることになる。 And since the heat transfer from the outer wall material 20 to the side wall portion outer heat insulating structure 2W side is suppressed in this way, the heat insulating performance of the building 100 is improved, and the moisture barrier plate 11 constituting the moisture barrier layer B is improved. Thermal expansion will be suppressed. Thus, the width of the gap 15 for avoiding interference between the moistureproof plates 11 due to thermal expansion of the moistureproof plate 11 can be set as small as possible, for example, about 5 mm. And since the width | variety of the clearance gap 15 is small, the damage of the clearance gap moisture-proof part 32 which consists of the seal | sticker part 32a and the tape material 32b by the insertion of the finger | toe and a foreign material to the said clearance gap 15 at the time of construction will be avoided.

尚、外壁材２０は、建物躯体１の側壁部１Ｗの外側に固定された鉄骨材２１により支持されている。また、この側壁部１Ｗの外表面側における鉄骨材２１の周囲部には、発泡ウレタンなどの断熱材２２が充填されており、これにより、この部位での断熱性が確保されている。 The outer wall member 20 is supported by a steel frame member 21 fixed to the outside of the side wall 1W of the building housing 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, thereby ensuring heat insulation at this portion.

〔屋根部外断熱構造２Ｌ〕
図２に示すように、屋根部外断熱構造２Ｌの防湿層Ｂの屋外側（上方側）には、上述した断熱ボード１２，１３と同様の断熱ボード２５を複数並設して構成された第２断熱層Ｃが設けられている。このように、防湿層Ｂの外側に第２断熱層Ｃが設けられているので、外気温の上昇や日射等による熱が防湿層Ｂ側に伝達されることが抑制され、屋根部外断熱構造２Ｌの断熱性が向上されるのに加えて、防湿層Ｂを構成する防湿板１１の熱膨張が一層抑制されることになる。このことで、防湿板１１の熱膨張による防湿板１１同士の干渉を回避するための隙間１５の幅を例えば５ｍｍ程度と極力小さく設定することができる。そして、隙間１５の幅が小さいことで、施工時において、当該隙間１５への指や異物の挿入によるシール部３２ａやテープ材３２ｂからなる隙間防湿部３２の損傷が回避されることになる。 [Roof insulation 2L]
As shown in FIG. 2, on the outdoor side (upper side) of the moisture-proof layer B of the outer heat insulating structure 2L, a plurality of heat insulating boards 25 similar to the heat insulating boards 12 and 13 described above are arranged side by side. Two heat insulation layers C are provided. Thus, since the 2nd heat insulation layer C is provided in the outer side of the moisture proof layer B, it is suppressed that the heat | fever by the raise of external temperature, solar radiation, etc. is transmitted to the moisture proof layer B side, and a roof part outer heat insulation structure In addition to the improvement of 2L heat insulation, the thermal expansion of the moisture barrier plate 11 constituting the moisture barrier layer B is further suppressed. Thus, the width of the gap 15 for avoiding interference between the moistureproof plates 11 due to thermal expansion of the moistureproof plate 11 can be set as small as possible, for example, about 5 mm. And since the width | variety of the clearance gap 15 is small, the damage of the clearance gap moisture-proof part 32 which consists of the seal | sticker part 32a and the tape material 32b by the insertion of the finger | toe and a foreign material to the said clearance gap 15 at the time of construction will be avoided.

更に、第２断熱層Ｃの外表面には、屋上面の必要強度を確保しながら屋根部外断熱構造２Ｌ側への浸水を防止するために、アスファルト防水層などの保護層２６が構築されている。尚、屋根部外断熱構造２Ｌにおいては、建物躯体１の屋根部１Ｌと断熱層Ａとの間にも適宜防水下地が施されており、当該屋根部１Ｌ側への浸水が確実に防止されている。更に、保護層２６の外表面の仕上げとして高反射塗装を施すことで、日射による防湿板１１の熱膨張を一層抑制することができる。 Furthermore, a protective layer 26 such as an asphalt waterproof layer is constructed on the outer surface of the second heat insulation layer C in order to prevent water from entering the roof outer heat insulation structure 2L while ensuring the required strength of the roof. Yes. In addition, in the heat insulation structure 2L outside the roof part, a waterproof base is also appropriately provided between the roof part 1L of the building housing 1 and the heat insulation layer A, so that inundation to the roof part 1L side is reliably prevented. Yes. Furthermore, by applying highly reflective coating as a finish on the outer surface of the protective layer 26, thermal expansion of the moisture-proof plate 11 due to solar radiation can be further suppressed.

〔別実施形態〕
（１）上記実施形態では、防湿板１１の隣接間に形成された隙間１５の幅の変化に追従して当該隙間１５を塞ぐ隙間防湿部３２を、隙間１５を埋めるシール部３２ａと、その外表面側を覆うテープ材３２ｂとで構成したが、隙間防湿部３２の機能を確保する範囲内において、シール部３２ａ及びテープ材３２ｂの何れか一方を省略したり、別の構成の隙間防湿部を採用しても構わない。 [Another embodiment]
(1) In the above embodiment, the gap moisture-proof portion 32 that closes the gap 15 following the change in the width of the gap 15 formed between the moisture-proof plates 11 and the seal portion 32a that fills the gap 15 and the outside thereof The tape material 32b that covers the surface side is provided, but within the range of ensuring the function of the gap moisture-proof portion 32, either the seal portion 32a or the tape material 32b is omitted, or the gap moisture-proof portion of another configuration is provided. You may adopt.

（２）上記実施形態では、屋根部外断熱構造２Ｌにおいてのみ防湿層Ｂの外側に第２断熱層Ｃを設けたが、第２断熱層Ｃは適宜省略しても構わない。また、側壁部外断熱構造２Ｗにおいても、防湿層Ｂの外側に第２断熱層を設けても構わない。 (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. Moreover, you may provide a 2nd heat insulation layer in the outer side of the moisture-proof layer B also in the side wall part heat insulation structure 2W.

（３）上記実施形態では、断熱ボード１２と防湿板１１とを一体化してなる断熱防湿パネル１０を建物躯体１の外側に複数並設して、外断熱構造２を構築したが、これら断熱ボードと防湿板とを別々に建物躯体１の外側に敷設して、外断熱構造２を構築しても構わない。この場合、断熱ボードについては、隣接間において断熱ボードの側面を密着させながら建物躯体の外表面に複数並設し、防湿板については、隣接間において隙間を設けて複数並設することになり、この隙間に対して隙間防湿部が設けられることになる。 (3) In the said embodiment, although the heat insulation moisture-proof panel 10 formed by integrating the heat insulation board 12 and the moisture proof board 11 was arranged in multiple numbers on the outer side of the building housing 1, the outer heat insulation structure 2 was constructed | assembled, but these heat insulation boards And the moisture barrier plate may be separately laid on the outside of the building housing 1 to construct the outer heat insulating structure 2. In this case, for the heat insulation board, a plurality of juxtapositions are provided on the outer surface of the building frame while adhering the side surfaces of the heat insulation board between adjacent ones. A gap moisture-proof portion is provided for this gap.

１建物躯体
２外断熱構造
２Ｌ屋根部外断熱構造（外断熱構造）
２Ｗ側壁部外断熱構造（外断熱構造）
１０断熱防湿パネル
１１防湿板
１１湿板
１１ａ折曲部
１２断熱ボード
１２ａ嵌合段部
１２ｂ密着露出面
１３断熱ボード
１５隙間
２５第２断熱層
３２隙間防湿部
３２ａシール部（隙間防湿部）
３２ｂテープ材（隙間防湿部）
１００建物
Ａ断熱層
Ｂ防湿層 1 Building frame 2 Outside heat insulation structure 2L Roof outside heat insulation structure (outside heat insulation structure)
2W Side wall outer heat insulation structure (outer heat insulation structure)
DESCRIPTION OF SYMBOLS 10 Heat insulation moisture-proof panel 11 Moisture-proof board 11 Wet plate 11a Bending part 12 Heat insulation board 12a Fitting step part 12b Contact | adhering exposed surface 13 Heat insulation board 15 Crevice 25 2nd heat insulation layer 32 Crevice moisture prevention part 32a Seal part (gap moisture prevention part)
32b Tape material (gap moisture-proof part)
100 Building A Thermal insulation layer B Moisture-proof layer

Claims

An outer heat insulating structure including a heat insulating layer provided outside the building housing and a moisture-proof layer provided outside the heat insulating layer,
The moisture-proof layer is composed of a metal plate-like moisture-proof plate arranged in parallel with a gap between adjacent ones, and a gap moisture-proof portion that closes the gap following the change in the width of the gap. Thermal insulation structure.

The heat insulating layer and the moisture proof layer are configured by arranging a plurality of heat and moisture proof panels formed by integrating the heat insulating board and the moisture proof plate constituting the heat insulating layer on the outside of the building housing,
The heat and moisture barrier panel has a close contact exposed surface in close contact with an adjacent heat insulating board on an outer peripheral portion of the heat insulating board, and the outer peripheral portion of the moistureproof plate is retracted inward from the close contact exposed surface along an in-plane direction. The outer heat insulating structure according to claim 1, wherein the outer heat insulating structure is configured as described above.

The moisture barrier plate has a bent portion on the outer peripheral portion,
The heat insulating board can be fitted to the edge of the outer peripheral portion on the moisture-proof plate side so that the bent portion of the moisture-proof plate is retracted to the inner side of the contact exposed surface to form a gap. Have
The outer heat insulating structure according to claim 2, wherein the heat insulating moisture proof panel is configured by fitting a bent portion of the moisture proof plate to a fitting step portion of the heat insulating board.

The external heat insulation structure of any one of Claims 1-3 which provided the 2nd heat insulation layer in the outer side of the said moisture-proof layer.

It is a construction method of an outer heat insulating structure in which a heat insulating layer is laid outside the building frame, and a moisture barrier layer is laid outside the heat insulating layer,
Using a heat-insulation and moisture-proof panel obtained by integrating in advance a heat insulating board having a close-contact exposed surface on the outer periphery and a moisture-proof plate whose inner periphery is retracted inward from the close-contact exposed surface along the in-plane direction,
A plurality of the heat and moisture barrier panels are juxtaposed on the outer surface of the building frame while closely adhering the exposed exposed surface of the heat insulating board between adjacent ones, and formed between the moisture barrier plates adjacent to the heat insulating and moisture barrier panels arranged side by side. A construction method of an outer heat insulating structure in which the heat insulating board is configured by the heat insulating board and the moistureproof layer is formed by the moistureproof plate and the gap moistureproof portion by closing the gap to be formed with a flexible gap moistureproof portion.