ROOF AND ROOF BOARD MATERIAL

摘要

An installation work for roof ridge portions is simplified, relocation/removal is simplified, and air ventilation via ridges is made possible. A roof board material (10) has a third projecting sheet (43) and second projecting sheet (42) projecting from the upper surface of a roof board member (12). The roof board material (10) fixed to a rafter (N) is covered on the ridge side of the roof with a ridge cap (120). The ridge cap (120) has its skirt portion (123) and a rear-side projecting sheet (125) projecting from the lower surface of the ridge cap and respectively inserted between joint members (14L) in the roof board material (10). Therefore, the skirt portion (123) on the lower surface of the ridge cap (120) and the third projecting sheet (43) on the upper surface of the roof board member (12) and the rear-side projecting sheet (125) on the lower surface of the ridge cap (120) are alternately arranged in this order along the roof slope and face each other in a range covered with the ridge cap (120) and extending from a pole plate to a ridge side.