| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage structure of an air-exhaustion duct, which can surely prevent intrusion of rainwater into a room, and can be executed easily. SOLUTION: The air-exhaustion duct is passed from a room to the outdoors in the drainage structure. The duct comprises a waterproofing section 25 in a predetermined length from the end of the outdoor side to the indoor side, a drainage slope is provided in the bottom face of the section 25, in a state of being higher in the indoor side. |
