To provide a waterproof structure which improves waterproofness of a joint part between waterproof sheets.
A rubber asphalt tape 6 is prestuck on a crossing corner between a floor board 3 and water-resistant plywood 5 in such a manner as to straddle them. The waterproof sheet 7 is continuously arranged from the floor board 3 to a lower part of the plywood 5 in such a manner as to run around the corner. A height H from the floor board 3 at the upper edge of the rising part of the waterproof sheet 7 along the plywood 5 is set at 30 mm or more, for example, on the order of 30-150 mm. The waterproof sheet 8 similar to the waterproof sheet 7 is stuck onto the plywood 5 by means of an adhesive and a double-faced pressure-sensitive adhesive tape. The waterproof sheets 7 and 8 are pressure-bonded to the tape 6 by means of a roller etc. Caulking 9 using silicon etc. is applied between an upper edge of the waterproof sheet 7 and a lower edge of the waterproof sheet 8. A rubber asphalt tape 10 is stuck in such a manner as to straddle a joint between the waterproof sheets 7 and 8. Resin mortar 11 is applied onto the waterproof sheets 7 and 8, and a cement board 12 is stuck on the resin mortar 11. After the resin mortar 11 is dried, a tile is stuck for finishing on the cement board 12 via an elastic adhesive.
TANAKA YOSHIO
MIWA KOJI
