Roof composition and drainage construction of roof works (design of flat roof and pitched roof)
. Functional coverage, load bearing, sun protection, wind and rain protection, waterproof, drainage, thermal insulation and heat insulation of the roof. II. The roof is composed of structural layer, leveling layer, thermal insulation layer, waterproof layer, surface layer, etc Roof classification 1. According to different slopes, it can be divided into ⑴ flat roofs (with a small slope and a gradient of 2%~3% in general), which are suitable for urban residences, schools, office buildings and hospitals. ⑵ Sloping roof (large slope) 2. It can be divided into ⑴ rigid roof (2) coiled material roof (flexible roof) (3) tile roof (4) coated roof (5) earth covered roof (6) membrane roof according to different materials