| 摘要 |
PROBLEM TO BE SOLVED: To simply achieve heat insulation in a building foundation after ensuring termite prevention property.SOLUTION: A roof board material 310 includes a first roof board material 312 jointed to a roof truss YH, a second roof board material 314, an end first board material part 313a, an end second board material part 313b, and an end third board material part 313c, formed in a bent shape. The second roof board material 314 is supported by the end second board material part 313b and the end third board material part 313c and positioned above the roof truss YH. The second roof board material 314 covers the adjacent first roof board material 312 and the end first board material part 313a extending from one end of the first roof board material 312 in a state that the third board material part 313c is jointed to or close to the end second board material part 313b of the adjacent roof board material 310, thus exhibiting an external roofing appearance from a ridge side of a roof to an eaves side. |
