| 摘要 |
PROBLEM TO BE SOLVED: To provide a balcony floor airtight structure capable of preventing penetration of moisture from a lower floor living room to a space under a balcony floor, and a method for constructing it. SOLUTION: In this balcony floor airtight structure, a balcony 4 is provided on a lower floor living room 2a, and an airtight sheet 20 is interposed at the boundary between the lower floor living room 2a and the balcony floor 9 of the balcony 4.
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