In modern rolled bituminous materials cardboard which eventually collapses was replaced with glass fiber glass half or synthetic fabric.
Roll roofing material impregnated.
Modified bitumen roll roofing a longer lasting roll roofing material for flat roofs they just don t make stuff like they used to.
Otherwise the safest minimum pitch for rolled roofing is 2 inches of decline per 12 inches of horizontal direction 2 12 pitch.
Owens corning deckseal sa sbs cap 39 375 ft w x 32 833 ft l 100 sq ft shasta white roll roofing.
If your roof pitch declines up to 1 inch vertically for every 12 inches horizontally 1 12 pitch it is a good candidate for rolled roofing as long as you use the concealed nail method of fastening.
This material is similar to pergamin only as impregnation coal tar was used.
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.
Rolled roofing material is often used on roofs that are low sloped.
Asphalt roll roofing peel and stick roofing torch down roofing flat roof brown roll roofing roofing materials related products liberty 3 ft.