Roof Underlayment For Asphalt Shingles

An underlayment should be used beneath asphalt shingles especially on roofs with a slope less than 8 12.

Roof underlayment for asphalt shingles.

For starters the textured underlayment isn t just weatherproof. If you re looking for the best roof underlayment for asphalt shingles then the tyvek protec 120 should be on your wishlist. This makes it a highly versatile underlayment that you can use under roof coverings that are mechanically attached for example roofs with cedar tile slate and asphalt shingles. See fema publication 55 coastal construction manual for guidance concerning underlayment for other types of roofs.

Despite its wide range of compatibility it still does offer a bit more whenever you re dealing with asphalt shingles. Roof underlayment prevents the roof deck from being exposed to the elements before or while the roofing material is being installed. The gator skin synthetic roof underlayment has very positive customer ratings and seems to be one of the most reliable you can purchase. This product is compatible with asphalt shingles residential metal and cedar shake roofing in place of 15 and 30 organic felt it also exceeds performance requirements of astm d4869 and atsm d226.

The use of underlayment is typically a requirement for class a fire resistance. Asphalt felt aka building paper has been the go to substrate for roof shingles for more than a century and it s still quite popular because of how well it works and how affordable it is. Installing an underlayment helps to minimize picture framing i e. Seal the self adhering sheet to the deck penetrations with roof tape or asphalt roof cement.

It can also be used on sloped roofs. The visible outline of deck panels caused by irregularities in roof decking thickness.