Eave back ceiling material and eaves back ceiling structure

摘要

PROBLEM TO BE SOLVED: To increase the fire resistance of eaves back ceiling material 21 and to make the base material 22 hardly swell even if there is absorption of water, and the fastener of eaves back ceiling material 21 is relatively inside eaves back ceiling material 21 It prevents penetration and keeps the appearance finish of the eaves back ceiling material 21 good over a long period of time. SOLUTION: An eaves back ceiling material 21 is attached to a base material 22 made of a volcanic glass multi-layered board and a surface of the base material 22 opposite to the eaves back space 5 in a construction state. A decorative sheet 30 and an aluminum multilayer sheet 24 laminated on the back surface located on the eaves back space 5 side in a construction state are provided. In the aluminum multilayer sheet 24, a polyethylene terephthalate resin film 26 for preventing moisture is integrally adhered to the side of the base 22 of the aluminum foil 25, and a pulp paper 27 for preventing moisture is integrally adhered to the side opposite to the base And a three-layer structure. The decorative sheet 30 has a wood pattern 31 having the same color tone as the surface of the indoor ceiling material 35. [Selected figure] Figure 3