ROOF UNDERLAYMENT MATERIAL AND ITS CONSTRUCTION METHOD
PROBLEM TO BE SOLVED: To provide a roof underlayment material capable of being fixed to a roof underlaying plate without using staples or forming holes in the roof underlayment material, by which rainwater does not enter the roof underlaying plate, the roof underlaying plate does not corrode, or the roof underlayment material is not broken or damaged because of the holes. SOLUTION: The roof underlayment material comprises base materials 1a and 1b impregnated with asphalt or improved asphalt, an asphalt or improved asphalt layer 2 arranged between the base materials 1a and 1b, and metal plates 3 buried in the asphalt or improved asphalt layer 2. The metal plates 3 are heated by electromagnetic induction heating to melt the adjacent asphalt, so that the asphalt may be fixedly attached to the roof underlaying plate. COPYRIGHT: (C)2008,JPO&INPIT
