| 摘要 |
PROBLEM TO BE SOLVED: To simplify constituting work, and reduce the cost for a ventilation unit to be provided on a roof surface. SOLUTION: In a roof surface ventilation unit, a ventilation passage body, etc., is installed around an opening part provided in a sheathing roof board, and to realize the waterproof structure, a water cut-off plate member 4 to surround an outer peripheral portion of the ventilation passage body and an upper cover 5 to cover an upper portion of the ventilation passage body are formed of sheet metal, and integrated with each other. The number of parts is reduced, the execution is facilitated, and the cost is reduced.
|
