ROOF STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a roof structure capable of efficiently retaining water in a planting part for a long period. SOLUTION: This roof structure has a planting part S in which soil 1 having a prescribed thickness is piled on an inclined roof B2 on which a waterproof layer 4 is provided. In the roof structure, a water-retaining part 2 made of a water-absorbing polymer and capable of freely retaining water is provided in the planting part S along the upper part of the waterproof layer 4.