Rool Roofing Pitch

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.

Rool roofing pitch. Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater. That is if your roof is 12 units wide it should not be taller than 2 units for rolled roofing. It has just one layer so it goes. Wood shakes require a minimum roof pitch of 3 12 or greater.

Otherwise the safest minimum pitch for rolled roofing is 2 inches of decline per 12 inches of horizontal direction 2 12 pitch. How to install roll roofing on low slope roofs. The roof pitch is necessary for two things one estimating the amount of material to be ordered for the job and two knowing what materials are suited for the roof. Built up roofs require a minimum roof pitch of 1 4 12 or greater.

An organic felt or fiberglass mat saturated with asphalt and faced with granular stone aggregate. Modern technologies have significantly improve the performance of bitumen roll materials to extend their service life of up to 15 25 years and made them more universal. Rolled roofing is not recommended for roofs that have a greater than a 2 to 12 pitch. The material is based on the same materials used in asphalt shingles.

The function of the roof in weather and the environment determines the minimum pitch for a roof. How to install roll roofing on a flat or pitched roof with your own hands. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The installation process known as torch on roofing is often used on commercial.

Wood shingles require a minimum roof pitch of 3 12 or greater. Installation tips and guides. Slate and slate type shingles require a minimum roof pitch of 4 12 or greater. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Asphalt roll roofing or membrane is a roofing material commonly used for buildings that feature a low sloped roof pitch in north america. A typical roof has three layers a felt layer and two layers of overlapping shingles. For example you may think you want classic composite shingles on your roof but if the pitch is below a certain ratio you may be forced to install a different type of roofing perhaps rolled roofing or standing seam metal roofing. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run.