| 摘要 |
PROBLEM TO BE SOLVED: To provide a veranda having high drain efficiency, and to easily and surely prevent water leakage. SOLUTION: A surface of a floor 2 includes a combination of a top line 14 inclined at a first gradient becoming low toward the projection side 10 from the house side 9 of the veranda 1 and a pair of inclined faces 15 inclined at a second gradient becoming low toward the left and right from the top line 14. Mutually fitting recessed part and projecting part are arranged in a part of mutually opposing joining end surfaces of a floorboard material 7, a space is generated between a recessed bottom surface of the recessed part and a projecting top surface of the projecting part, and an adhesive is filled in the space.
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