| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a roof panel and a roof backing structure using the same, capable of imparting predetermined heat shield performance while maintaining predetermined moisture permeability and ventilation performance, and capable of attaining simplification of labor on manufacture and construction of the roof panel and short time.SOLUTION: The roof panel 10 is integrated by joining sheathing plywood 11 and a heat insulation material 12, and a ventilation layer 13 is arranged inside between the sheathing plywood 11 and the heat insulation material 12, and a metallic thin film of a range of 30μm-70μm in a thickness, is stuck to an inner bottom surface of the ventilation layer 13, and a heat ray reflection layer 14 is provided, so that heat shield performance is imparted to the inner bottom surface of the ventilation layer 13, and the heat insulation layer 12 is composed of a porous material being 0.70 (m.s.Pa)/ng or less in moisture permeability specific resistance, and a plurality of holes 14A are provided in the heat ray reflection layer 14, and moisture permeability is imparted to the inside of the ventilation layer 13 by setting moisture permeability resistance in a thickness 50μm to 0.6×10(m.s.Pa)/ng or less.</p> |
