JP2014163179A - Heat insulation method of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulation method of a building, capable of sufficiently exhibiting heat insulation and heat shielding in the building, minimizing end materials to be discarded in construction, preventing the infiltration of rainwater from the outdoor, and coping with dew condensation.SOLUTION: Reflection sheets each formed by pasting an aluminum foil on a flexible synthetic resin sheet are arranged on outdoor sides of pillars, studs, beds, and members around windows so that the aluminum foils are positioned on outdoor sides of a building. A hard urethane resin foamable liquid is foamed and sprayed into a clearance between each reflection sheet and each of the pillars, the studs, the beds, and the members around the windows to form a hard urethane resin foam layer, and outer wall materials are arranged with vent layers in which air is circulated in the vertical direction, each of the vent layers being interposed between the outer wall material and the outdoor side of the reflection sheet.

Description

  The present invention relates to a heat insulating construction method for buildings.

In buildings such as houses, glass wool, rock wool, urethane boards, foamed synthetic resin materials, etc. have been used as heat insulating materials to block outdoor cold air and hot air in order to maintain an indoor environment. ing. An aluminum foil or the like is used as a heat shielding material that shields outside air heat.
And there is also a plate-like aluminum heat ray reflective material that combines these heat insulating materials and heat shield materials, with aluminum foil bonded to a foamed synthetic resin board. There is a heat insulation method that is installed on the outdoor side such as pillars, eaves girders, foundations, windows, etc., and is blown and filled with liquid hard urethane resin foam in the space between the indoor side ( Patent Document 1).

  By combining the aluminum heat ray reflective material formed by combining this aluminum foil and a polyethylene foam sheet, and the rigid urethane resin foam layer, it exhibits excellent performance in heat insulation, heat insulation, heat retention and dew prevention. is there.

JP 2007-138558 A

However, in the heat insulating material and the construction method described in Patent Document 1, for example, when fixing a board-shaped aluminum heat ray reflective material to the outdoor side around a pillar / intermediate pillar, base, and window, the dimensions of the construction site Since the regular aluminum heat ray reflective material is cut in accordance with the above, waste material to be discarded is generated and waste is inevitably generated. In addition, although an airtight tape is attached to the end of the heat insulating material to close the gap, rainwater may enter from the airtight tape portion, and further waterproof measures have been required.
In addition, the heat insulation structure has a particularly large heat insulation effect in cold regions such as Hokkaido in the I region, which reaches -20 ° C in severe winters, and in the mountainous areas of the Tohoku and Nagano regions in the II region. Although it is used, because there is a large temperature difference between indoors and outdoors where heating is effective, condensation often occurs on the indoor side of the heat insulation structure as described above. It was also a cause of rotting.

  The present invention has been made in view of the above-described circumstances, and exhibits sufficient heat insulation and heat insulation in buildings, minimizes scraps discarded in construction, and intrudes rainwater from outside. The object of the present invention is to provide a heat insulating construction method for buildings that can prevent condensation and cope with condensation.

The heat insulating construction method for a building according to the present invention includes a reflective sheet in which an aluminum foil is bonded to a flexible synthetic resin sheet, and a column / intermediate column, base / window such that the aluminum foil is positioned on the outdoor side of the building. Rigid urethane foam is sprayed and blown into the gap between the reflection sheet and the inner wall substrate arranged on the indoor side around the reflection sheet and the pillars / intermediate pillars, windows, and windows. A step of forming a resin foam layer, a step of sticking a butyl rubber waterproof tape from the outdoor side of the reflection sheet to a joint portion between an edge of the reflection sheet and the pillar / intermediate column, base / window, and the reflection sheet And a step of disposing an outer wall member with an air-permeable layer through which air flows in the vertical direction on the outdoor side.
Thereby, according to the heat insulation construction method of the building of the present invention, the radiant heat from the outer wall material is reflected to the ventilation layer side by the reflection sheet, and the heat can be discharged to the outdoors by the flow of air through the ventilation layer. In addition, the heat transmitted through the reflection sheet without being completely reflected can be reliably insulated by the hard urethane resin foam layer. In addition, unlike the conventional board type, when the reflective sheet is constructed, the sheet body generally wound in a roll shape does not generate scraps that are wasted by cutting, thereby reducing the cost of construction. Can contribute. In addition, by sticking the butyl rubber waterproof tape to the edge of the reflection sheet from the outdoor side, it is possible to prevent rainwater from entering from the edge of the reflection sheet and exhibit a suitable waterproof function.

  Further, the reflection sheet is characterized by being formed by laminating an aluminum foil, a polyethylene laminate layer, and a polyethylene fiber woven fabric.

  Further, the reflection sheet is characterized by being fixed with staples on the outdoor side around the pillars / intermediate pillars, torches / eave girders, foundations / windows.

  In addition, a ventilation fan and a heat storage element are provided, and one or a plurality of pairs of ventilation units, one of which is inhaled while the other is exhausted, are disposed through the building interior and exterior.

  Further, the present invention is characterized in that a boron-based preservative is applied to a wooden part of a building to which a reflection sheet is attached.

It is explanatory drawing which shows the heat insulation construction method of the building which concerns on this invention. It is explanatory drawing of the aluminum composite heat insulation sheet used for the heat insulation construction method of the building which concerns on this invention. It is explanatory drawing which shows the heat insulation construction method of the building which concerns on this invention. It is explanatory drawing which shows the ventilation system used for the heat insulation construction method of the building which concerns on this invention.

  Hereinafter, the form of the heat insulation construction method of a building of the present invention is explained in detail, referring to an accompanying drawing. 1 to 4 are diagrams illustrating embodiments of the present invention. In these drawings, the same reference numerals denote the same components, and the basic configuration and operation are the same. To do.

<Configuration>
FIG. 1 shows an embodiment of the present invention, and represents a wall structure of a house in a wooden conventional construction method, particularly a base or window. In the figure, 1 is a wall structure, 2 is a girder, eaves girder, 3 is a base / window circumference, 4 is an aluminum composite heat insulating sheet, 5 is a hard urethane resin foam material, 6 is an aluminum composite heat insulating sheet 4 and an outer wall material 7 A ventilation layer 8 provided between them is an inner wall base such as a plaster board.
The pillars / intermediate pillars are positioned in the vertical direction between the trunk / eave girder 2 and the base / window periphery 3 shown in FIG. 1, and set a gap in which the rigid urethane resin foam material 5 is interposed.

As shown in FIG. 2, the aluminum composite heat insulating sheet 4 is a sheet body configured by adhering three layers of an aluminum foil 41, a transparent polyethylene laminate layer 42, and a polyethylene fiber woven fabric 43 having strength. , Light weight, softness, flexibility, water resistance. Although this aluminum composite heat insulating sheet 4 has a very thin thickness of about 0.12 millimeters, it has a large bursting strength and tensile strength, so that it has excellent workability and is easy to use as a building material. Provided in a rolled form.
Since this aluminum composite heat insulating sheet 4 has a large heat reflectance of about 96%, a large heat shielding effect is exhibited by disposing it on the outdoor side of the heat insulating structure.

  5 is a hard urethane resin foam material, which is affixed on the outdoor side, and an aluminum composite heat insulating sheet 4 affixed on the outdoor side so as to sandwich the pillars, studs, trunks, eaves girder 2, base and window periphery 3 Located in the gap with the inner wall base 8.

  FIG. 3 shows, as an example, the case where the heat insulation method of the present embodiment is carried out around a window, and shows a state in which the heat insulation structure of the present invention is applied around an aluminum sash from above. In this embodiment, a state in which the lower end of the aluminum composite heat insulating sheet 4 is bonded and fixed to the outdoor side of the aluminum sash 9 with a butyl rubber adhesive tape 10 that exhibits waterproof performance is shown. By using the adhesive tape 10, there is no possibility that rainwater or the like flowing through the aluminum sash 9 will enter the room through the gaps in the aluminum composite heat insulating sheet 4. Of course, the butyl rubber-based pressure-sensitive adhesive tape 10 can also be used around a base other than around the window.

  FIG. 4 shows a ventilation system required together with heat insulation in the heat insulation structure of the present invention. In this structure, one or more pairs of ventilation units 13 including a ventilation fan 11 and a heat storage element 12 are arranged on the wall of a building, and the structure is simpler than that of a conventional ventilation system using a duct. It has become. The one or more pairs of ventilation units 13 are connected to a controller (not shown), and inhale one ventilation unit 13 (outdoor to indoor) and exhaust the other ventilation unit 13 (indoor to outdoor), This is reversed between several tens of seconds to several minutes to switch between intake and exhaust.

That is, when the outside air temperature is 0 ° C. in the winter season, the heat of the indoor 23 ° C. air is accumulated in the heat storage element 12 at the time of exhaust, and the air of 3 ° C. is exhausted outdoors, and at the time of intake, the temperature is 0 ° C. Cold air is warmed by the heat storage element 12 and is taken into the room as 17 ° C. air.
Although the power consumption of the ventilation unit 13 is as low as several W / h or less, the ventilation volume is about 10 m ³ / h even when operated with the fan sound suppressed, which is sufficient as a ventilation capacity for preventing condensation. . Thereby, it is also possible to operate the ventilation unit 13 continuously for 24 hours.

<Method>
The construction method of the heat insulation structure of the present embodiment having the above-described configuration will be described in detail below.
First, the aluminum composite heat insulating sheet 4 is fixed with staples to the outdoor side of the pillars / intermediate pillars, torso / eave girder 2, base / window periphery 3 by using a hammer. At this time, since the aluminum composite heat insulating sheet 4 is wound in a roll shape, the necessary amount of scrap material is not generated when it is unwound from the roll, cut and used. And even if it is the thin aluminum composite heat insulation sheet 4 which has flexibility, a flat surface can be hold | maintained in the state tensioned like the board by making the space | interval stopped with a staple fine.

At the construction site, the hard urethane resin foam material 5 is formed by foaming and spraying a hard urethane resin foamable liquid between the aluminum composite heat insulating sheet 4 and the inner wall base 8.
Between the aluminum composite heat insulating sheet 4 and the outer wall material 7, a ventilation layer 6 having an interval of about 20 to 30 millimeters is formed.
Thereby, the aluminum foil 41 of the aluminum composite heat insulating sheet 4 reflects the radiant heat from the outer wall material 7 warmed in the summer to the indoor side, and this heat is transferred outdoors by the flow of air that passes from below to above the ventilation layer 6. Can be discharged. In order to create the air flow in the ventilation layer 6, it is not necessary to install a fan or the like, and it is sufficient to use natural air convection.

  Further, although not particularly illustrated, a wood preservative mainly composed of a boron-based compound is applied to the wood portion on which the aluminum composite heat insulating sheet 4 is disposed. Thereby, it can prevent that a xylem rots by condensation etc.

  The heat insulation method of the present invention can be used in the housing industry.

4 Aluminum composite heat insulating sheet 41 Aluminum foil 42 Polyethylene laminate layer 43 Polyethylene fiber woven fabric 5 Hard urethane resin foam 6 Venting layer 7 Outer wall material 8 Inner wall base 9 Aluminum sash 10 Butyl rubber adhesive tape 11 Ventilation fan 12 Thermal storage element 13 Ventilation unit

Claims (5)

A step of disposing a reflective sheet in which an aluminum foil is bonded to a flexible synthetic resin sheet on the outdoor side of a pillar / intermediate column, a base / window, such that the aluminum foil is positioned on the outdoor side of the building; ,
Forming a hard urethane resin foam layer by foaming and spraying a hard urethane resin foaming liquid in a gap between the reflective sheet and the pillars / intermediate pillars, the base and the inner wall base disposed around the window;
A step of sticking a butyl rubber waterproof tape from the outdoor side of the reflective sheet to the junction between the edge of the reflective sheet and the pillar / intermediate pillar, the base, and the window periphery;
And a step of arranging an outer wall material on the outdoor side of the reflection sheet with a ventilation layer through which air flows in the vertical direction.   The heat insulating construction method for a building according to claim 1, wherein the reflection sheet is formed by laminating an aluminum foil, a polyethylene laminate layer, and a polyethylene fiber woven fabric.   The heat insulating construction method for a building according to claim 1 or 2, wherein the reflection sheet is fixed by staples on the outdoor side around the pillars / intermediate columns, torches / eave girders, foundations / windows.   3. A ventilation unit comprising a ventilation fan and a heat storage element, wherein one or a plurality of ventilation units, one of which is exhausted while the other is exhausted, is disposed through the building interior and exterior. Insulation method of building.   The heat insulation method for a building according to claim 1 or 2, wherein a boron-based preservative is applied to a wooden part of a building to which a reflection sheet is attached.