Roof Insulation Weight Psf
Thickness 1 8 0 4 gypsum sheathing per 1 in.
Roof insulation weight psf. Weight psf sheathing plywood per in. Thickness 2 5 floors and floor finishes asphalt mastic per 1 in. Thickness 5 0 lumber sheathing per 1 in. Thickness 12 0 gypsum fill per 1 in.
Thickness 12 0 ceramic or quarry tile in. 3 ply ready roofing 1 0psf 2 15 lb 1 90lb 1 7psf 3 15 lb 1 90lb 2 2psf 3 ply gravel 5 6psf 4 ply gravel 6 0psf 5 ply gravel 6 5psf. Thickness 3 4 10 0 concrete fill per 1 in. A built up roof for example will typically include the built up membrane itself with or without gravel as well as some kind of insulation and cover board which will vary in thickness from roof to roof.