JP2005126948A - Airtight heat insulating construction method of wooden house building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the airtight heat insulating performance of a wooden house building by forming a continuous airtight heat insulating layer of uniform thickness by excellent spraying workability while sufficiently securing the structural strength of a lower roof part. <P>SOLUTION: At sidewall parts W1, W2, board-like heat insulating materials 2A, 2B are fixed to the outside of columns 1A, 1B. At the lower roof part R, a board-like heat insulating material 2C is mounted through a heat insulating backing 14 to the lower part of a purlin 13 fixedly supported to a beam 10 through a vertical roof strut 12. Urethane foam is sprayed to the indoor side faces of the respective board-like heat insulating materials 2A, 2B, 2C, using a spray gun. A continuous foaming-in-place airtight heat insulating layer 15 is thereby formed over the whole inner surface area. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a wooden house building in which the entire inner surface of a wooden house building having a lower roof portion is hermetically insulated by a board-like heat insulating material and an in-situ foamed air-tight heat insulating layer sprayed on the indoor side surface of the board-like heat insulating material. This relates to the airtight insulation construction method.

  In wooden residential buildings, it is very important to improve the airtightness and heat insulation performance of the whole room in order to save energy consumption for cooling and heating as much as possible, so as to save energy. At the same time, foamed resin such as urethane foam is sprayed on the floor of the board-like insulation material on the indoor side with a spray gun so as to close the joints of the board-like insulation material. An air-tight heat insulating construction method for forming a heat insulating layer is desirable.

  By the way, the lower roof part structure in the wooden house building which has the lower roof part extended toward the outward diagonally downward from the middle of the side wall part is generally comprised as shown in FIG.3 and FIG.4. In other words, the pillar 1A in the side wall W1 in the upper chamber from the lower roof R and the column 1B in the side wall W2 in the room (lower house) immediately below the lower roof R are fixedly connected to each other by the beam 10 or the small beam 10a. In the upper and lower side walls W1 and W2, board-like heat insulating materials 2A and 2B such as urethane boards are driven and fixed between the outer plates 11A and 11B on the outside of the pillars 1A and 1B, respectively. In addition, a hook 3 is fixed to the outside of the pillar 1A in the lower roof portion R, and a base material 5 is stretched and fixed on the hook 3 via a rafter 4, and a urethane board or the like is placed on the base material 5. A heat insulating material 2 </ b> C is attached, and a lower roof portion R having heat insulating properties is configured by laying a roof material 9 on the upper portion thereof via a roof rafter 6, a roof base material 7 and an asphalt roofing 8.

  In a wooden house building having the lower roof portion R having the above-described structure, the side wall portion has been conventionally used for airtight treatment of the entire indoor area so as to close the joint gaps of the board-like heat insulating materials 2A, 2B, and 2C. Airtight insulation construction in which foamed airtight insulation layer is formed by spraying in-situ foamed urethane, etc., from the indoor side with spray gun toward the indoor side surface of the board-like heat insulating materials 2A, 2B and 2C of W1, W2 and lower roof part R The law was adopted.

  However, in the lower roof portion R having the above-described structure, when foaming urethane or the like is sprayed from the indoor side, the spray gun is obstructed by the beam 10 or the small beam 10a, so that the spraying thickness is reduced. As a result, a non-uniform thickness and discontinuous hermetic heat insulation layer is formed, and in particular, in the case of spraying with a spray gun, it must be sprayed at a certain distance from the spraying surface. For example, the thickness of the airtight heat insulating layer is not uniform, and as a result, there is a problem that sufficient airtight performance and heat insulating performance cannot be obtained as a whole residential building. Further, instead of spraying with such a problematic spray gun, for example, it may be possible to apply a hermetic paint or the like manually to form a uniform and continuous hermetic heat insulating layer. However, in this case, there is a problem that a great amount of construction time and construction cost are required.

  The present invention has been made in view of the above circumstances, and while ensuring sufficient structural strength of the lower roof portion, a continuous hermetic heat insulating layer with a uniform thickness is formed by spraying with excellent workability to form an airtight It aims at providing the airtight insulation construction method of the wooden house building which can aim at the improvement of heat insulation performance.

  In order to achieve the above-mentioned object, the airtight heat insulation construction method for a wooden house building according to the present invention includes a side wall portion of a wooden house building having a lower roof portion extending obliquely outwardly from the middle of the side wall portion, and For a wooden house building where the entire inner surface including the lower roof part is hermetically insulated with a board-like heat insulating material and an in-situ foamed air-tight heat insulating layer formed by blowing foam resin on the indoor side surface of this board-like heat insulating material It is a hermetic heat insulation construction method, in which the board-like heat insulating material is driven and fixed to the outside of the column at the side wall portion, and the shed bundle is attached to the beam portion of the lower roof portion that is displaced outward by the thickness of the board-like heat insulating material. The board is fixedly supported via the board, and the board-like heat insulating material connected to the board-like heat insulating material outside the pillar is attached to the lower part of the main house via the heat insulating base, and then the board-like heat insulating material on the indoor side surface of each board-like heat insulating material. Continuous blowing of in-situ foamed airtight insulation layer Only to construction, thereafter, it is characterized in that construction the lower roof part.

  In particular, the in-situ foamed hermetic heat-insulating layer in the present invention is preferably formed by spraying in-situ foamed urethane as described in claim 2, and as described in claim 3, on the outside of the column. It is desirable to form a continuous air passage between the board-like heat insulating material and the side wall exterior plate that are fixed by driving and between the roof material of the lower roof portion and the board-like heat insulating material.

  According to the present invention having the above-described features, as the structure of the lower roof part, the main building is fixedly supported via a bundle of sheds on a beam strongly connected to a column, and the board is provided below the main building with a heat insulating base. By adopting a configuration such as attaching a cylindrical heat insulating material, while ensuring a structural strength equal to or higher than conventional, while blowing foam resin from the indoor side using a spray gun to the lower part of the board heat insulating material, It is possible to form a spraying surface having a space where the spray gun can be easily operated by restricting the movement of the spray gun or obstructing obstacles such as beams and small beams. Therefore, it does not require time-consuming and costly manual work such as applying an airtight paint, etc., and it is not only the inner surface of the side wall portion but also the lower roof portion by spraying with excellent workability and economy using a spray gun. The airtight heat insulation layer having a uniform thickness and a continuous thickness can be formed on the inner surface of the board-like heat insulating material in the wall, and as a result, the airtight heat insulation performance as a whole wooden house building can be remarkably improved. Play.

  In particular, since the airtight heat insulating performance as described above can be ensured, a continuous air passage between the board-like heat insulating material and the exterior plate in the side wall portion and between the roof and the board-like heat insulating material in the lower roof portion. By forming the above, the ventilation performance of the wooden house building can be enhanced without lowering the hermetic heat insulation performance, and further improvement of the comfort can be achieved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view for explaining the structure of a lower roof portion for carrying out the hermetic heat insulation construction method for a wooden house building according to the present invention and a specific airtight heat insulation construction procedure for the lower roof portion, and FIG. 2 is its lower roof. It is a longitudinal cross-sectional view of the principal part which shows the state which the airtight heat insulation construction of the inner surface whole region including a part and a side wall part was completed. In addition, in the following description, it demonstrates using the same code | symbol to the component same as the conventional lower roof part structure and airtight heat insulation construction method shown in FIG.3 and FIG.4.

  The column 1A in the side wall W1 in the upper room and the column 1B in the side wall W2 in the lower room directly under the lower roof R rather than the lower roof R, which are fixedly connected to each other by the beam 10, the small beam 10a, etc. The board-like heat insulating materials 2A and 2B such as urethane boards are respectively driven and fixed between the exterior plates 11A and 11B. On the other hand, in the lower roof portion R, the main building 13 is fixedly supported via the shed bundle 12 on the beam 10 portion of the portion displaced outward by the thickness of the board-like heat insulating material 2A in the side wall portion W1 in the upper chamber. A number of heat insulating bases 14 are struck on the lower surface of the main building 13, and a board-like heat insulating material 2C such as a urethane board is applied to the lower surface of these heat insulating bases 14 at both ends of the lower roof portion R in the gradient direction at the both side wall portions W1 and W2. It attaches to the state which contact | abuts board-shaped heat insulating material 2A, 2C.

  By attaching such a board-shaped heat insulating material 2C, the lower roof portion R is sufficiently lower to expose a part of the small beam 10a on the inner side of the lower shed room, as clearly shown in FIG. A flat and flat spraying surface is formed. Thereafter, on-site foamed urethane is applied to the inner surfaces of the board-like heat insulating materials 2A and 2B in the side wall portions W1 and W2 and the spraying surface of the board-like heat insulating material 2C in the lower roof portion R using a spray gun. By spraying so as to block the joint gaps of the board-like heat insulating materials 2A, 2B, 2C, etc., as shown in FIG. Therefore, it is possible to ensure excellent airtightness and heat insulation performance as a whole residential building.

  Thereafter, the roof rafter 6 is mounted on the main building 13, and then the roof material 9 is laid through the roof base material 7 and the asphalt roofing 8, thereby constructing the predetermined lower roof portion R. In addition, between the board-shaped heat insulating materials 2A and 2B and the side wall exterior plates 11A and 11B that are driven and fixed to the outside of the pillars 1A and 1B, and between the roof material 9 of the lower roof portion R and the board-shaped heat insulating material 2C. The continuous ventilation path 16 is formed, thereby improving the ventilation performance of the wooden house building while maintaining the above-described excellent hermetic heat insulation performance, and further improving the comfortability.

  In addition, in the said embodiment, although the in-situ foaming airtight heat insulation layer 15 was formed by spraying of foaming urethane, of course, you may use foaming resins other than urethane.

It is a perspective view explaining the structure of the lower roof part which implements the airtight heat insulation construction method of the wooden house building which concerns on this invention, and the specific airtight heat insulation construction procedure with respect to the lower roof part. It is a longitudinal cross-sectional view of the principal part which shows the state which the airtight heat insulation construction of the whole inner surface including the lower roof part and side wall part in the same wooden house building was completed. It is a perspective view which shows the structure of the lower roof part in the conventional wooden house building. It is a longitudinal cross-sectional view of the principal part which shows the structure of the lower roof part in the conventional wooden house building same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A, 1B ... Pillar, 2A, 2B, 2C ... Board-shaped heat insulating material, 9 ... Roofing material, 10 ... Beam, 11A, 11B ... Exterior plate, 12 ... Hut bundle, 13 ... Purlin, 14 ... Thermal insulation base, 15 ... On-site Foam-tight heat-insulating layer, 16 ... vent, W1, W2 ... side wall, R ... lower roof.

Claims (3)

A board-like heat insulating material and a room for the board-like heat insulating material are formed on the entire inner surface including the side wall portion and the lower roof portion of a wooden house building having a lower roof portion that extends obliquely outwardly from the middle of the side wall portion. It is an airtight heat insulation construction method for a wooden house building in which airtight heat insulation construction is performed with an in-situ foam airtight heat insulation layer formed by spraying foam resin on the inner surface,
At the side wall, a board-like heat insulating material is driven in and fixed to the outside of the column, and at the lower roof part, the main building is fixedly supported via a bundle of sheds on the beam portion that is displaced outward by the thickness of the board-like heat insulating material. After installing the board-like heat insulating material connected to the board-like heat insulating material outside the pillar through the heat insulating base at the lower part of this main building, the in-situ foamed airtight heat insulating layer is continuously applied to the indoor side surface of each board-like heat insulating material. An airtight heat insulating construction method for a wooden house building, characterized in that the lower roof portion is constructed after spraying. The method for airtight heat insulation of a wooden house building according to claim 1, wherein the in situ foamed airtight heat insulating layer is formed by spraying in situ foamed urethane. The continuous ventilation path is formed between the board-shaped heat insulating material and the side wall exterior plate that are driven and fixed to the outside of the column and between the roof material and the board-shaped heat insulating material of the lower roof part. 2. A hermetic heat insulation construction method for wooden houses as described in 2.

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