PLANT CULTIVATION STRUCTURE, ROOT-PREVENTING STRUCTURE AND ROOT-PREVENTING SHEET USED IN THEM

摘要

A plant cultivation structure is provided to be used for a root-proof sheet which is inexpensive, has the effect of preventing roof penetration surely, makes construction easy and improves durability. A plant cultivation structure formed on the rooftop and the roof of a building comprises a waterproof layer installed at the bottom, and a root-proof layer(B) formed on the waterproof layer to prevent roots of plants from penetrating to the waterproof layer. The roof-proof layer comprises a resin film(20) having the enough strength to prevent the penetration of roots of plants, and an adhesion layer(22) formed at the backside of the resin film, wherein the part where resin films face with each other or overlap each other in the root-proof layer is provided with an adhesion layer at the backside to prevent the penetration of roots of plants and attached with a covering tape having the enough strength to prevent the penetration of roots of plants to make the thickness of the adhesion layer of the covering tape smaller than the front diameter of the root penetration of plants.