| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor structure for a balcony having no fear of caulking exhaustion of a waterproof caulking material and allowing reliable waterproofing. SOLUTION: A floor substrate material 2 and a drain gutter 3 are installed on floor joists 1, and a floor material 5 is installed on the floor substrate material 2 via a waterproof sheet 4. A convex section 8 having a nearly inverted U-shaped cross section, with its upper face kept nearly flush with the upper face of the floor material 5, is formed at the side end of the drain gutter 3 in the longitudinal direction of the drain gutter 3. A recess 9 having a bottom face on the floor joists 1 is provided between the convex section 8 and the end edge of the floor substrate material 2 or the floor material 5, and the waterproof caulking material 7 is filled in the recess 9.
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