15 Lb Felt Roof Overlap

This gardner asphalt 15 432 sq.

15 lb felt roof overlap. A conventional roll of felt is enough for 432 square feet. Product may vary by store. Felt underlayment for all roof installations or replacements. Convert the area from inches to feet prior to purchasing your felt.

Of coverage for residential and commercial roofing projects. Roofing felt is required to overlap 2 inches over the lower felt course. The roofing felt should be applied in layers that overlap. Fifteen pound felt has a perm rating of about 5 although this number can rise in high humidity conditions.

Plywood or osb roof deck so 15 20 or 30 will work for any shingle roof the type i recommend depends on roof slope. Width and a 144 ft. 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. 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.

In most cases this will leave 400 square feet 37 m 2 of net coverage per 1 roll. Buy the roof felt. 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. For residential and commercial use.

However you must allow for overlaps on joints. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. It s available in two thicknesses. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below.

Purchase enough felt to cover your roof s area. Many codes municipalities and manufacturers require at least a 15 lb. As you work the paper can be tacked down in the center so it won t blow away. Unrolled length that combine to provide over 430 sq.

At s a roofing we disagree with this statement. This underlayment features excellent asphalt saturation for effective waterproofing. One roll of conventional 15 felt covers 432 square feet 40 1 m 2. 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.

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.