15 Lb Felt Roof Overlap

This gardner asphalt 15 432 sq.

15 lb felt roof overlap.

In most cases this will leave 400 square feet 37 m 2 of net coverage per 1 roll. This underlayment features excellent asphalt saturation for effective waterproofing. 15 asphalt felt roofing underlayment provides an extra layer of protection between your shingles and your roof deck. Roofing felt is required to overlap 2 inches over the lower felt course.

Product may vary by store. Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof the type i recommend depends on roof slope. In my opinion felt paper is a vapor barrier plus keeps the oils in the shingles from leaching out and into the wood substrate i e. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below.

Of coverage for residential and commercial roofing projects. Convert the area from inches to feet prior to purchasing your felt. One roll of conventional 15 felt covers 432 square feet 40 1 m 2. However you must allow for overlaps on joints.

As you work the paper can be tacked down in the center so it won t blow away. Thirty pound felt is more resistant to damage during installation of the roof covering material and will protect the roof longer if it should somehow become exposed to weather. Felt has a 36 in. Purchase enough felt to cover your roof s area.

Buy the roof felt. Felt underlayment for all roof installations or replacements. Unrolled length that combine to provide over 430 sq. It s available in two thicknesses.

The roofing felt should be applied in layers that overlap. You might hear some say if the felt paper is nailed then it basically is ruined or is not applicable as a water proofing agent. Fifteen pound felt has a perm rating of about 5 although this number can rise in high humidity conditions. Many codes municipalities and manufacturers require at least a 15 lb.

15 felt type construction helps provide an extra layer of protection between your shingles and your roof deck not included heavy duty design lays flat to help minimize wrinkling asphalt saturation to help improve waterproofing ability to help prevent wind driven rain and water from other sources from infiltrating under your shingles and. Since you will have overlap between rows this works out to a total coverage area of 400 square feet the dimensions of a 20 x 20 roof. A conventional roll of felt is enough for 432 square feet. For residential and commercial use.

Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest.