| 摘要 |
PROBLEM TO BE SOLVED: To control condensation in the reverse side of a metal roofboard by forming integrally a heat insulating sound absorbing material to be arranged on the reverse side of the metal roofboard and a thin sheet thereon and forming the shapes of the reverse side of the roofboard and the heat insulating sound absorbing material so that they may contact tightly each other. SOLUTION: A heat insulating sound absorbing material 4 is arranged on the position of a roof substrate that faces the shape of the reverse side 3 of the metal roofboard where a plurality of squeezing-out shapes for decoration are formed on the surface of the metal roofboard. Subsequently, in the adsorbing material 4, a thin sheet 4b of a synthetic resin or the like formed integrally on a synthetic resin foamed body 4a and the surface thereof, projecting portions 4c are provided nearer the eaves side than the foamed body 4a. Subsequently, when the sound absorbing material 4 is arranged in a manner that allows it to contact tightly the reverse of the metal roofboard, the projecting portions 4c enter between the reverse side of the overlapping connection of the metal roofboard and the surface side of a sticker, and fixes the metal roofboard watertightly to the overlapping connection. By arranging the sound absorbing material 4 in close contact with the reverse side of the metal roofboard, the heat insulating property of the reverse side of the metal roofboard is secured and thereby dew condensation can be controlled.
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