Underlayment For Shingles On A Roof

Your shingles serve their own purpose.

Underlayment for shingles on a roof.

A roofing contractor installing synthetic shingle underlayment. For starters the textured underlayment isn t just weatherproof. The modern roof system consists of multiple components and the first one to go down on the decking that supports your roof is shingle underlayment. The purpose of the shingle underlayment is to provide an additional moisture resistant layer to back up your roof shingles.

For the lower portion of the roof especially the part that overhangs the eaves and is susceptible to ice dams it is a good idea to apply self stick waterproof shingle underlayment wsu also called ice guard. For many years felt paper served as the leading type of shingle underlayment. What is shingle underlayment. Shingles reflect the sun s rays withstand wind and block precipitation.

But shingles overlap and aren t sealed at all corners. Be mindful of the proper nailing technique so that your nails always hold the top edge of the course beneath it. Working your way up and across begin laying your courses. It s installed directly on the roof deck and provides a secondary layer of protection from the elements including rain snow and wind.

Now that you ve conquered the underlayment and drip edge and plotted your course it s time to truly learn how to install roof shingles. They re the first line of defense. 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.

Ideally the roof covering material would be installed as soon as possible but in reality the roof may be protected by only the underlayment for days weeks or sometimes months. Roofing underlayment is what lies between the shingles and the roof sheathing or roof deck which is typically either plywood or osb. If you re looking for the best roof underlayment for asphalt shingles then the tyvek protec 120 should be on your wishlist. Underlayment flashings and shingles all work together and must be installed in the correct order.