15 Lb Felt Roof Overlap

For residential and commercial use.

15 lb felt roof overlap.

Many codes municipalities and manufacturers require at least a 15 lb. However you must allow for overlaps on joints. 15 asphalt felt roofing underlayment provides an extra layer of protection between your shingles and your roof deck. 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.

Purchase enough felt to cover your roof s area. A conventional roll of felt is enough for 432 square feet. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. This gardner asphalt 15 432 sq.

Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof the type i recommend depends on roof slope. Product may vary by store. Roofing felt is required to overlap 2 inches over the lower felt course. One roll of conventional 15 felt covers 432 square feet 40 1 m 2.

This underlayment features excellent asphalt saturation for effective waterproofing. It s available in two thicknesses. 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. 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.

At s a roofing we disagree with this statement. Start at the bottom of the roofline and work up so any water that gets through the roofing material will shed down the tar paper and will not go under it. The roofing felt should be applied in layers that overlap. In most cases this will leave 400 square feet 37 m 2 of net coverage per 1 roll.

The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. Felt underlayment for all roof installations or replacements. Buy the roof felt. Unrolled length that combine to provide over 430 sq.

Convert the area from inches to feet prior to purchasing your felt. Width and a 144 ft. Felt has a 36 in. Fifteen pound felt has a perm rating of about 5 although this number can rise in high humidity conditions.

Of coverage for residential and commercial roofing projects.