Is Roofing Felt Needed For Metal Roof

Roofing felt may be necessary for use with your shingles to meet a class a fire rating when shingles are evaluated for their fire ratings it is done on a small test deck with the roofing felt underlayment in place without this underlayment the shingles alone may not meet the class a fire requirements.

Is roofing felt needed for metal roof.

Start the roof felt at one bottom corner of the roof. Defer putting drip edge on angled gable ends until after the felt is laid so the metal edge will block wind from lifting the felt. The steeper the pitch the less likely moisture is to sit and seep into gaps and cracks in the shingles. Felt otherwise known as underpayment is required when.

Extremely dry environments are also one area where felt may not be necessary. With metal roofing its also a good idea to put a layer of red rosin paper between the felt or ice water shield and the metal that way it wont potentialy stick to it and cause oil canning and would allow for expansion. This link will take you to section 1507 requirements for roof coverings to jump to the subsection for your type of material click the name of the material in the code index on the left side of the page you may have to click on the. Synthetic underlayment is a newer innovation that is taking over the metal roofing industry as a better more advanced replacement for felt underlayment.

Most codes and good roofing practice would require felt. By andrew hazleton updated august 20 2018 roofing felt commonly called tar paper is an important component of any roofing system. Roofing felt is always recommended but is not actually required by all shingle manufacturers. Using a roll of felt coverage or several rolls provides the roof with additional waterproofing and protects the wood sheathing of a roof until the installation of shingles is finished.

For steep pitched roofs felt is often not required. Most synthetic underlayments are mechanically attached with roofing caps and staples while others have a glue backing. Roofing felt is a layer of tar paper installed beneath the shingles to provide a backup waterproof membrane in case of leakage.