How To Lay Roll Roofing On A Flat Roof

Prepare the roof by tearing off the old shingles or by preparing for a reroof.

How to lay roll roofing on a flat roof.

For a flat or nearly flat roof use double coverage although a torch down modified bitumen or epdm roof is a better solution. Roll out and cut roll roofing to cover the length of the roof. Place the top edge of the roofing along the chalk line. Installing peel and stick roll roofing on a flat roof requires a minimum slope of 1 2 inch per 12 inch roof run.

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. Typically a flat roof is a low sloping roof with a maximum 10 degrees of pitch or usually having a slope of up to 3 inches per linear foot for adequate drainage. Working with a helper expect to spend half a day installing flashings and roll roofing for a 700 square foot roof with modest complications. The rolled roofing should reach the chalk line when you lay it down and should stretch from 1 side of the roof to the other.

You ll need to use plenty of pressure with the razor knife to cut the rolled roofing material.