For a flat roof on a home or garage homeowners are learning that the traditional roofing material asphalt roll roofing is probably not the best choice any longer.
Roll roofing material impregnated.
Gaf tri ply app granule cap sheet 3 3 ft w x 32 25 ft l 100 sq ft white roll roofing.
Otherwise the safest minimum pitch for rolled roofing is 2 inches of decline per 12 inches of horizontal direction 2 12 pitch.
Rolled roofing material is often used on roofs that are low sloped.
In modern rolled bituminous materials cardboard which eventually collapses was replaced with glass fiber glass half or synthetic fabric.
Modified bitumen roll roofing a longer lasting roll roofing material for flat roofs they just don t make stuff like they used to.
Now almost not produced and is not used due to the fact that tar is a carcinogen.
This material is similar to pergamin only as impregnation coal tar was used.
Ft sbs self adhering cap sheet roll for low slope roofing in black.