Roofing Felt Under Cement Board

Residential and commercial roofing shingles slate roof ventilation roof underlayments asphaltic and tpo roof membranes.

Roofing felt under cement board.

As a cover board securock brand cement roof board can be used with a variety of membranes and systems. Understanding the proper way to install the drip edge will only get you so far. Roofing underlayment or felt protects the roof deck from rain before the roofing is installed. Installing building paper is a simple task.

Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment. Does drip edge go over or under felt. After the subfloor is down roll out either felt paper or rosin paper starting next to the longest wall. Yes you ll need to put the felt just behind the cement board.

But over the underlayment along the rake edges of the roof. Item 656632 model 0903000. Having a layer of roof felt will block the resin preventing it from staining or compromising your roof shingles. The lightest cement board in the industry is ideal for use as a cover board in system applications such as liquid applied membranes or as a parapet fire or thermal barrier roof board.

All you need to do is tack it up or staple it. Behind the green board thats above your cement board wont hurt but you don t need to. Roofing shingles and materials plus factory certified roofers including ratings from real homeowners from north america s largest roofing manufacturer. When to use roof underlayment no matter what type of asphalt shingle you are using whether traditional or more robust styles such as under premium designer architectural and performance shingles it is recommended to use a underlayment.

Roofing underlayment or felt provides an extra weather barrier in case of blowoffs or water penetration through the roofing or flashings.