| 摘要 |
PROBLEM TO BE SOLVED: To retain air-tightness and prevent reduction of heat insulation effect by forming a shiplap joint between a heat insulation material and the side face of an external heat insulation material and dividing a heat insulating columnar body having almost the same length as a column into two members and mutually fitting the columnar bodies like a dado joint in the vicinity of the external corner of the column. SOLUTION: Wall 2, 2' are provided to come in contact with a column 1 at right angles and plaster boards 3, 3' are installed thereon. A pair of heat insulation columnar bodies 10, 20 made of a polyurethane foam or the like having almost the same length with the column 1, are erected at the external corner of the column 1, and fitted to heat insulation members 5, 5'. Faces 11, 51 provided with a shiplap joint respectively are formed on the heat insulation columnar bodies 10, 20 and the heat insulation members 5, 5'. The heat insulation columnar bodies 10, 20 are provided with an oblique face 12 for a dado joint respectively. The columnar bodies 10, 20 may be integrally formed. The clumnar bodies are fixed to each other with nails at the corner, and air-permeable furring strips are fixed at the outside of the heat insulation members 5, 5' on the walls, and asphalt felt or the like is fixed from above. In this way, airtightness is retained and reduction of heat insulation effect can be prevented. |
