JP5431759B2 - Wall structure - Google Patents

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JP5431759B2
JP5431759B2 JP2009073290A JP2009073290A JP5431759B2 JP 5431759 B2 JP5431759 B2 JP 5431759B2 JP 2009073290 A JP2009073290 A JP 2009073290A JP 2009073290 A JP2009073290 A JP 2009073290A JP 5431759 B2 JP5431759 B2 JP 5431759B2
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moisture
wall
ventilation
wall material
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JP2010222902A (en
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石山元
荻野光彦
林崎哲也
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IG Kogyo Co Ltd
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Description

本発明は、排湿機能、結露防止機能、断熱機能、防水機能、等を向上した壁構造に係るものである。   The present invention relates to a wall structure with improved moisture exhaustion function, dew condensation prevention function, heat insulation function, waterproof function, and the like.

壁体内が密閉状態の場合、水蒸気の逃げ場が無く、外気温度が低いと外壁材裏面や壁体内に結露が発生する。そこで、壁体内の水蒸気を外気に排出して内部結露を防止したり、土台や柱にしみ込んだ水分を外気に排出するために、外壁材と躯体間に厚さ２０ｍｍ程度の空気層（通気層）を設ける工法、所謂通気工法が開発された。本来、通気工法とは、壁内結露防止のための工法である。（例えば、特許文献１〜６参照）。   When the wall is hermetically sealed, there is no place for water vapor to escape, and condensation occurs on the back of the outer wall material or on the wall if the outside air temperature is low. Therefore, an air layer (ventilation layer) having a thickness of about 20 mm is provided between the outer wall material and the housing in order to discharge water vapor in the wall to the outside air to prevent internal dew condensation and to discharge moisture that has soaked into the base and pillars to the outside air. ), A so-called ventilation method was developed. Originally, the ventilation method is a method for preventing dew condensation in the wall. (For example, see Patent Documents 1 to 6).

特開平０９−１１９１７５号公報JP 09-119175 A 特開平０９−１４４１５２号公報JP 09-144152 A 特開平１１−２４１４２７号公報Japanese Patent Laid-Open No. 11-241427 特開平１１−２９３８０１号公報JP 11-293801 A 特開２０００−２９１１６９号公報JP 2000-291169 A 特開２００３−３２８４６０号公報JP 2003-328460 A

しかしながら、特許文献１〜６は湿気を排出するが、外気が外壁材の裏面を通過するために、外壁材に断熱性のある部材を形成しても断熱材としての効果を発揮出来ず断熱材として機能しないものであるとされていた。勿論、住宅の外壁の断熱性を計算する上でも断熱性が無いものとされていた。また、窯業系外壁材の雨漏りを防止するために通気工法を採用することが多くなり、現在では雨漏り防止のために雨仕舞い工法として考えている人も多い。また、通気層内を動く空気の量は、外の風によって大きく変化するものであり、特に風が強い場合には通気量が多くなり、断熱性のある外壁材を使用しても、効率の良い断熱性を発揮出来ない欠点があった。このため、風が強い場合でも通気層内の通気量を抑制することが大きな課題であった。   However, Patent Documents 1 to 6 exhaust moisture, but since the outside air passes through the back surface of the outer wall material, even if a heat insulating member is formed on the outer wall material, the effect as a heat insulating material cannot be exhibited. It was supposed not to function as. Of course, it was assumed that there was no heat insulation in calculating the heat insulation of the outer wall of the house. In addition, a ventilation method is often employed to prevent the leakage of ceramic outer wall materials, and many people are now considering it as a rain closing method in order to prevent rain leakage. In addition, the amount of air that moves in the ventilation layer varies greatly depending on the outside wind. Especially when the wind is strong, the ventilation rate increases. There was a drawback that good thermal insulation could not be demonstrated. For this reason, even when the wind is strong, it has been a big problem to suppress the amount of ventilation in the ventilation layer.

本発明はこのような欠点を解決するために、下地と断熱性を有する外壁材間に土台部から小屋裏に連通した排湿層を形成した壁構造において、排湿層の下端に縦胴縁との間に隙間を有し、垂直平面状の固定面と、固定面の上端を屋外側へ突出すると共に、両端を下方に傾斜した防風面とからなる通気抑制部材を形成すると共に、外壁材の桁部分と軒天間に、排湿層と連通するように上開口は形成し、外壁材と土台部間に排湿層と連通するように下開口を形成した壁構造を提供するものである。 In order to solve such disadvantages, the present invention provides a wall structure in which a moisture exhaust layer is formed between the base and the outer wall material having heat insulating properties and communicated from the base portion to the back of the hut. And forming an airflow suppressing member that includes a vertical flat fixed surface, and a windproof surface that protrudes from the upper end of the fixed surface to the outdoor side and is inclined downward at both ends. An upper opening is formed between the spar portion and the eaves so as to communicate with the moisture removal layer, and a wall structure in which a lower opening is formed between the outer wall material and the base portion so as to communicate with the moisture removal layer is provided. is there.

本発明に係る壁構造によれば、排湿層を流れる空気の量を自然対流程度に抑制出来るために（１）排湿層（空気層）の外側に位置する外壁材が断熱材として機能する。（２）外壁材の断熱性により、排湿層、外壁材の裏面および壁内の温度が高く保持され、より内部結露の発生が抑えられる。また、（３）排湿層の下端に縦胴縁との間に通気路（隙間）を有して通気抑制部材を形成したために、風が強い場合でも排湿層内に強風が吹き込むことが無く、排湿層内の通気量を一定に保つことが出来る。等の特徴、効果がある。   According to the wall structure of the present invention, since the amount of air flowing through the moisture exhaust layer can be suppressed to the level of natural convection, (1) the outer wall material positioned outside the moisture exhaust layer (air layer) functions as a heat insulating material. . (2) Due to the heat insulating property of the outer wall material, the temperature of the moisture removal layer, the back surface of the outer wall material, and the wall is kept high, and the occurrence of internal dew condensation is further suppressed. (3) Since the ventilation control member is formed with a ventilation path (gap) between the bottom edge of the moisture removal layer and the vertical trunk edge, strong wind may blow into the moisture removal layer even when the wind is strong. And the air flow rate in the drainage layer can be kept constant. There are features and effects.

本発明に係る壁構造の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the wall structure which concerns on this invention. 本発明に係る壁構造の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the wall structure which concerns on this invention. 本発明に係る壁構造の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the wall structure which concerns on this invention. 本発明に係る壁構造の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the wall structure which concerns on this invention. 本発明に係る壁構造の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the wall structure which concerns on this invention. 本発明に係る壁構造に使用する通気抑制部材の一例を示す説明図である。It is explanatory drawing which shows an example of the ventilation suppression member used for the wall structure which concerns on this invention. 本発明に係る壁構造に使用する外壁材の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the outer wall material used for the wall structure which concerns on this invention. 本発明に係る壁構造のその他の実施例を示す説明図である。It is explanatory drawing which shows the other Example of the wall structure which concerns on this invention. 本発明に係る壁構造のその他の実施例を示す説明図である。It is explanatory drawing which shows the other Example of the wall structure which concerns on this invention.

以下に図面を用いて本発明に係る壁構造について詳細に説明する。図１〜図５は本発明に係る壁構造を示す断面図、図６（ａ）、（ｂ）は本発明に係る壁構造に使用する通気抑制部材１１を示す説明図、図７（ａ）〜（ｄ）は外壁材Ａを示す説明図である。図中、αは下地、βは釘等の固定具、γは排湿層を示している。   The wall structure according to the present invention will be described in detail below with reference to the drawings. 1 to 5 are sectional views showing a wall structure according to the present invention, FIGS. 6A and 6B are explanatory views showing an air flow suppressing member 11 used in the wall structure according to the present invention, and FIG. (D) is explanatory drawing which shows the outer wall material A. FIG. In the figure, α indicates a base, β indicates a fixture such as a nail, and γ indicates a moisture removal layer.

下地αは、内装材１、ポリエチレンシート等の防湿層２、主柱、間柱等の躯体３、躯体３間に形成したグラスウール等の断熱材４より形成したものである。 The base α is formed from the interior material 1, a moisture-proof layer 2 such as a polyethylene sheet, a housing 3 such as a main pillar and a stud, and a heat insulating material 4 such as glass wool formed between the housings 3.

５は防風透湿層（二点鎖線で示す）であり、透湿防水シート（風・雨を通さず湿気だけを通す不織布）、あるいは透湿防水板（透湿性の高いシージングボード、シージングインシュレーションボード、等）よりなり、透湿性、防風性、防水性、等を有する部材より形成したものである。   5 is a wind-proof and moisture-permeable layer (indicated by a two-dot chain line), a moisture-permeable waterproof sheet (nonwoven fabric that passes only moisture without passing through wind and rain), or a moisture-permeable waterproof board (a highly moisture-permeable sizing board, sizing insulation) Board, etc.) and formed from a member having moisture permeability, windproof property, waterproof property, and the like.

６は排湿層形成部材であり、排湿層γが上下開口部と連通するように形成したものであり、例えば一定間隔で縦に形成した縦胴縁である。また、排湿層γが後記する開口部（上開口７、下開口８、小屋裏通気開口９）と連通するように形成されれば一定間隔で横に形成した横胴縁でも良いものである。勿論、排湿層形成部材６の替わりに、排湿層γ（溝）を形成した板材を部分的あるいは全面に形成してもかまわない。排湿層形成部材６の材質は、木材、金属材、プラスチック材、等である。   Reference numeral 6 denotes a drainage layer forming member, which is formed so that the drainage layer γ communicates with the upper and lower openings, and is, for example, a longitudinal body edge formed vertically at regular intervals. Further, if the moisture exhaust layer γ is formed so as to communicate with the openings described later (upper opening 7, lower opening 8, shed back ventilation opening 9), a horizontal trunk edge formed horizontally at regular intervals may be used. . Of course, instead of the drainage layer forming member 6, a plate material on which the drainage layer γ (groove) is formed may be partially or entirely formed. The material of the moisture removal layer forming member 6 is wood, metal material, plastic material, or the like.

７は上開口、８は下開口、９は小屋裏通気開口であり、排湿層形成部材６により形成された排湿層γと連通し、屋内Ｎから排湿層γに放出された室内Ｎから出た湿気を屋外Ｇに排出するための出口である。勿論、上開口７、下開口８、小屋裏通気開口９は湿気を排出するために取り入れる空気の流入口としても機能するものである。   Reference numeral 7 denotes an upper opening, 8 denotes a lower opening, and 9 denotes an air vent opening in the hut. The room N communicates with the moisture layer γ formed by the moisture layer forming member 6 and is released from the indoor N to the moisture layer γ. It is an outlet for discharging the moisture from the outdoor G. Of course, the upper opening 7, the lower opening 8, and the attic ventilation opening 9 also function as an inflow port for air taken in to discharge moisture.

上開口７は、外壁材Ａの桁部分と軒天１５間に、排湿層γと連通するように形成したものであり、図では止縁１０と軒天１５間に排湿層γと連通した上開口７を形成したものである。   The upper opening 7 is formed so as to communicate with the moisture draining layer γ between the spar portion of the outer wall material A and the eave roof 15. In the figure, the upper opening 7 communicates with the moisture draining layer γ between the stop edge 10 and the eave roof 15. The upper opening 7 is formed.

下開口８は、外壁材Ａと土台部Ｄ間に図では桟木Ｓを介して水切り１４を形成したものであり、図では水切り１４固定用に形成した桟木Ｓと土台部Ｄ間に排湿層γと連通した下開口８を形成したものである。   The lower opening 8 is formed by forming a drainer 14 between the outer wall material A and the base part D through the pier S in the figure, and in the figure, a moisture drain layer between the pier S and the base part D formed for fixing the drainer 14. A lower opening 8 communicating with γ is formed.

小屋裏通気開口９は、屋内Ｎに発生した湿気を排湿層γを介して小屋裏Ｋから屋外Ｇへ排出するために形成したものである。 The cabin back ventilation opening 9 is formed to exhaust moisture generated in the indoor N from the cabin back K to the outdoor G via the moisture removal layer γ.

１０は止縁、１４は水切りであり、外壁材Ａの上下端部を納めるための部材であると共に、上開口７と下開口８形成部材である。その素材としては金属材、あるいはプラスチック材、等よりなるものである。また、２２は軒天である。   10 is a stop edge, 14 is a drainer, and is a member for accommodating the upper and lower ends of the outer wall material A, and is an upper opening 7 and lower opening 8 forming member. The material is made of a metal material or a plastic material. Reference numeral 22 denotes an eave sky.

１１は通気抑制部材であり、図６（ａ）、（ｂ）に示すように垂直平面状の固定面１２と、固定面１２の上端を屋外Ｇ側へ突出した防風面１３とから形成したものである。その素材としては金属材、あるいはプラスチック材、等よりなるものである。   Reference numeral 11 denotes an airflow suppressing member, which is formed from a vertical flat fixed surface 12 and a windproof surface 13 projecting the upper end of the fixed surface 12 to the outdoor G side as shown in FIGS. 6 (a) and 6 (b). It is. The material is made of a metal material or a plastic material.

通気抑制部材１１は、図５、図６（ｂ）に示すように排湿層γの下端部に形成するものであり、排湿層形成部材６間との間に通気路Ｔを形成し、排湿層γを閉塞しないように形成したものである。 The ventilation suppression member 11 is formed at the lower end of the moisture exhaust layer γ as shown in FIGS. 5 and 6B, and forms an air passage T between the moisture exhaust layer forming members 6, This is formed so as not to block the moisture layer γ.

固定面１２は、通気抑制部材１１を下地αに固定具βにより固定する部分であり、固定面１２の上端は外側に向かって下方に傾斜して形成することにより、固定面１２の上端を屋外Ｇ側へ突出した防風面１３を傾斜して形成するものである。勿論、防風面１３の突出長さは排湿層形成部材６の厚さと同じ厚さに形成するものである。   The fixing surface 12 is a portion for fixing the air flow suppressing member 11 to the base α with the fixing device β, and the upper end of the fixing surface 12 is formed to be inclined downward toward the outside, so that the upper end of the fixing surface 12 is outdoors. The windproof surface 13 protruding to the G side is formed to be inclined. Of course, the protruding length of the windproof surface 13 is formed to be the same thickness as the thickness of the moisture exhaust layer forming member 6.

このように防風面１３を傾斜して形成することにより、図６（ｂ）に示すように、点線矢印で示す強風が、傾斜した防風面１３に衝突して回転し跳ね返されることにより、強風が直接排湿層γ内に浸入するのを阻止出来るものである。なお、通常の自然対流程度の通気は通気路Ｔにより確保出来るものである。   By forming the windproof surface 13 in an inclined manner as described above, as shown in FIG. 6 (b), the strong wind indicated by the dotted line arrow collides with the inclined windproof surface 13 and rotates and rebounds. It is possible to prevent direct entry into the moisture exhaust layer γ. In addition, the ventilation | gas_flowing path T can ensure the ventilation | gas_flowing about a normal natural convection.

Ａは断熱性を有する外壁材（以下、単に外壁材という）であり、その他機能として防水性、気密性、耐候性、等の機能を有する部材である。例えば、図７（ａ）〜（ｄ）に示すような金属製サイディング材等を使用するものである。特に、金属製サイディング材よりなる外壁材Ａは、金属製表面材Ａ１をロール成形した板材と、裏面材Ａ２間に合成樹脂発泡体（プラスチックフォーム）などの芯材Ａ３をサンドイッチした特に断熱性を有する外壁材Ａである。   A is an outer wall material having heat insulating properties (hereinafter simply referred to as an outer wall material), and is a member having functions such as waterproofness, airtightness, weather resistance, etc. as other functions. For example, a metal siding material as shown in FIGS. 7A to 7D is used. In particular, the outer wall material A made of a metal siding material has a particularly heat insulating property in which a core material A3 such as a synthetic resin foam (plastic foam) is sandwiched between a plate material obtained by roll-forming a metal surface material A1 and a back surface material A2. It is the outer wall material A which has.

さらに、図２（ａ）、（ｂ）を用いて本発明に係る壁構造の作用について説明する。つまり、図２（ａ）に示すように、空気が屋外Ｇから小屋裏Ｋへ流入する時は、小屋裏Ｋが負圧、軒天１５付近が正圧、土台部Ｄが正圧となり、外気は主として抵抗の少ない軒天１５部分から吸われ、抵抗の多い通気抑制部材１１方向（排湿層γ）からはあまり吸われないために排湿層γの温度が変化せず、外壁材Ａの断熱性が発揮される。通常はこの状態である。   Furthermore, the effect | action of the wall structure based on this invention is demonstrated using FIG. 2 (a), (b). That is, as shown in FIG. 2 (a), when the air flows from the outdoor G into the hut K, the hut K has a negative pressure, the eaves 15 vicinity has a positive pressure, and the base D has a positive pressure. Is mainly sucked from the part of the eaves 15 with a low resistance, and is not so much sucked from the direction of the ventilation control member 11 with a high resistance (exhaust layer γ), so the temperature of the exhaust layer γ does not change, and Thermal insulation is demonstrated. Usually this is the state.

また、希に図２（ｂ）に示すように、空気が小屋裏Ｋから屋外Ｇへ流出する時は壁面に対して平行に風が吹くような場合、あるいはその壁面が風下になる場合であり、小屋裏Ｋよりも、軒天１５付近および地面近くの土台部Ｄの方が気圧が低くなり、空気は小屋裏Ｋから上開口７を経て屋外Ｇに流れ、水切り１４方向（排湿層γ）から吸われる量が抑制され、排湿層γの温度が変化せず、外壁材Ａの断熱性が発揮されるものである。 In addition, as shown in FIG. 2 (b), when the air flows out from the back of the hut K to the outdoor G, the wind blows in parallel to the wall surface, or the wall surface becomes leeward. The air pressure is lower in the vicinity of the eaves 15 and in the base D near the ground than in the shed K, and the air flows from the shed K through the upper opening 7 to the outdoor G, in the direction of draining 14 (humidified layer γ ) Is suppressed, the temperature of the exhaust layer γ does not change, and the heat insulation of the outer wall material A is exhibited.

このように、小屋裏Ｋへの空気の流入・流出が、排湿路γへ影響せず、排湿層γ内を流れる空気の量を自然対流程度に抑制出来るために、排湿層γが断熱層として機能し、外壁材Ａの断熱性も発揮されるものである。なお、屋内Ｎから発生し排湿層γへ流入した湿気は、排湿層γの自然対流により、屋外Ｇへの空気の流出、屋内Ｎへの空気の流入に関係なく屋外Ｇへ常時排出されるものである。   Thus, since the inflow / outflow of air into the shed K does not affect the exhaust passage γ and the amount of air flowing in the exhaust layer γ can be suppressed to the level of natural convection, the exhaust layer γ It functions as a heat insulating layer, and the heat insulating property of the outer wall material A is also exhibited. The moisture generated from the indoor N and flowing into the moisture exhaust layer γ is always discharged to the outdoor G regardless of the outflow of air to the outdoor G and the inflow of air into the indoor N by the natural convection of the exhaust moisture layer γ. Is.

次に、図１〜図７を用いて本発明に係る壁構造の施工方法について説明する。まず、内装材１、ポリエチレンシート等の防湿層２、主柱、間柱等の躯体３、躯体３間に形成したグラスウール等の断熱材４より形成した下地α上に、防風透湿層５（透湿防水シート）を形成する。   Next, the construction method of the wall structure according to the present invention will be described with reference to FIGS. First, a wind- and moisture-permeable layer 5 (permeating layer) is formed on an interior material 1, a moisture-proof layer 2 such as a polyethylene sheet, a frame 3 such as a main pillar and an inter-column, and a base α formed of a heat insulating material 4 such as glass wool formed between the frames 3. A wet waterproof sheet).

その後、厚さ１８ｍｍ×幅４５ｍｍ程度の排湿層形成部材６を４５５ｍｍピッチで縦に複数本固定する。この時、排湿層形成部材６は軒天１５形成部分よりも内側に突出するように形成する。   After that, a plurality of the drainage layer forming members 6 having a thickness of about 18 mm and a width of about 45 mm are fixed vertically at a pitch of 455 mm. At this time, the drainage layer forming member 6 is formed to protrude inward from the eaves 15 forming part.

排湿層形成部材６の形成が完了したら、軒天１５を形成し、排湿層形成部材６間の排湿層γの下端部分に通気抑制部材１１を複数個形成し、通気路Ｔを形成する。その後上開口７、下開口８が形成されるように止縁１０、桟木Ｓ、水切り１４を固定する。 When the formation of the moisture removal layer forming member 6 is completed, the eaves 15 is formed, and a plurality of ventilation suppression members 11 are formed at the lower end portion of the moisture removal layer γ between the moisture removal layer forming members 6 to form the ventilation path T. To do. Thereafter, the stop edge 10, the crosspiece S, and the drainer 14 are fixed so that the upper opening 7 and the lower opening 8 are formed.

その後、排湿層形成部材６上に図７（ａ）に示すような外壁材Ａを各種役物を使用して施工し、施工を完了するものである。   Thereafter, the outer wall material A as shown in FIG. 7A is constructed on the moisture layer forming member 6 by using various kinds of accessories, and the construction is completed.

以上説明したのは本発明に係る壁構造の一実施例にすぎず、図８、図９（ａ）〜（ｃ）に示すように形成することも出来る。 What has been described above is only one embodiment of the wall structure according to the present invention, and it can be formed as shown in FIGS. 8 and 9A to 9C.

図８は、排湿層形成部材６上に防水層１６（点線で示す）を形成し、排湿層γ内に雨水等が浸入しないように形成したものである。例えば、アスファルトフェルトなどの防水シートである。   In FIG. 8, a waterproof layer 16 (indicated by a dotted line) is formed on the moisture exhaust layer forming member 6 so that rainwater or the like does not enter the moisture exhaust layer γ. For example, a waterproof sheet such as asphalt felt.

図１０（ａ）〜（ｃ）は（ａ）図に示すような断熱材からなる通気抑制部材１１により、（ｂ）、（ｃ）図に示すように形成した壁構造であり、断熱性を向上したものである。  FIGS. 10A to 10C are wall structures formed as shown in FIGS. 10B and 10C by the air flow suppressing member 11 made of a heat insulating material as shown in FIG. It is an improvement.

本発明に係る壁構造によれば、外壁材Ａの裏面に通気層（排湿層γ）を形成した壁構造では、外壁材Ａとして断熱性の有る部材を形成しても外壁材Ａが断熱材として認められなかったが、通気層（排湿層γ）内を空気が微量にしか移動しないように小屋裏通気開口・上開口・下開口の３カ所の開口を壁体に形成することにより、通気層（排湿層γ）の本来の意義である内部結露防止の効果を生かし、さらに、断熱性のある外壁材Ａの断熱効果を生むことで、外壁材裏面および壁内の温度を高く保つことが可能となり、省エネルギーと壁内結露の防止効果を高めることが出来る構造となる。これは、今までの通気構造のように、外壁材の裏面と下地間の通気路を外気が移動することにより結露を防止する構造とは異なり、外気の移動を極力抑えた状態で湿気だけを外部に排出出来る構造であるために、断熱性を有する外壁材の性能を有効に活用出来るものである。   According to the wall structure according to the present invention, in the wall structure in which the ventilation layer (exhaust layer γ) is formed on the back surface of the outer wall material A, the outer wall material A is thermally insulated even when a heat insulating member is formed as the outer wall material A. Although it was not recognized as a material, by forming three openings in the wall, the ventilating opening of the hut, the upper opening, and the lower opening so that the air moves only in a very small amount in the ventilation layer (humidification layer γ) Taking advantage of the effect of preventing internal dew condensation, which is the original significance of the ventilation layer (humidity removal layer γ), and further increasing the heat insulation effect of the heat insulating outer wall material A, the temperature of the outer wall material back surface and inside the wall is increased. It becomes possible to maintain, and it becomes a structure which can improve the energy saving and the prevention effect of dew condensation in the wall. Unlike conventional structures that prevent condensation by moving outside air through the ventilation path between the back of the outer wall material and the base, unlike conventional ventilation structures, only moisture is kept in a state where movement of outside air is minimized. Since the structure can be discharged to the outside, the performance of the outer wall material having heat insulation can be effectively utilized.

α 下地
β 固定具
γ 排湿層
Ａ 断熱性を有する外壁材
Ａ１ 金属製表面材
Ａ２ 裏面材
Ａ３ 芯材
Ｄ 土台部
Ｇ 屋外
Ｋ 小屋裏
Ｎ 屋内
Ｓ 桟木
Ｔ 通気路
１ 内装材
２ 防湿層
３ 躯体
４ 断熱材
５ 防風透湿層
６ 排湿層形成部材
７ 上開口
８ 下開口
９ 小屋裏通気開口
１０ 止縁
１１ 通気抑制部材
１２ 固定面
１３ 防風面
１４ 水切り
１５ 軒天
１６ 防水層
１７ 軒天通気口 α Base β Fixture γ Moisture layer A Outer wall material A1 with heat insulation A1 Metal surface material A2 Back material A3 Core material D Base part G Outdoor K Hut behind N Indoor S Pier T Airway 1 Interior material 2 Moisture barrier 3 Body 4 Heat Insulating Material 5 Windproof Breathable Layer 6 Humidity Layer Forming Member 7 Upper Opening 8 Lower Opening 9 Hut Back Venting Opening 10 Stop Edge 11 Ventilation Suppressing Member 12 Fixed Surface 13 Windproof Surface 14 Drainer 15 Eave 16 Waterproof Layer 17 Elevate mouth

Claims (1)

下地と断熱性を有する外壁材間に土台部から小屋裏に連通した排湿層を形成した壁構造において、排湿層の下端に縦胴縁との間に隙間を有し、垂直平面状の固定面と、固定面の上端を屋外側へ突出すると共に、両端を下方に傾斜した防風面とからなる通気抑制部材を形成すると共に、外壁材の桁部分と軒天間に、排湿層と連通するように上開口は形成し、外壁材と土台部間に排湿層と連通するように下開口を形成したことを特徴とする壁構造。 In the wall structure in which a moisture exhaust layer is formed between the foundation and the outer wall material having heat insulation , communicating from the base part to the back of the hut, there is a gap between the vertical trunk edge at the lower end of the moisture exhaust layer , While forming a ventilation control member consisting of a fixed surface and a windproof surface that protrudes the upper end of the fixed surface to the outdoor side, and both ends are inclined downward , a drainage layer is formed between the girder portion of the outer wall material and the eaves. An upper opening is formed so as to communicate with each other, and a lower opening is formed between the outer wall material and the base so as to communicate with the moisture removal layer .
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