15 Lb Felt Roof Overlap

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

15 lb felt roof overlap.

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. As you work the paper can be tacked down in the center so it won t blow away. At s a roofing we disagree with this statement. Convert the area from inches to feet prior to purchasing your 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. This underlayment features excellent asphalt saturation for effective waterproofing. Product may vary by store. 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.

A conventional roll of felt is enough for 432 square feet. In most cases this will leave 400 square feet 37 m 2 of net coverage per 1 roll. 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. However you must allow for overlaps on joints.

Of coverage for residential and commercial roofing projects. 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. Many codes municipalities and manufacturers require at least a 15 lb. Felt has a 36 in.

Felt underlayment for all roof installations or replacements. It s available in two thicknesses. For residential and commercial use. Buy the roof felt.

15 asphalt felt roofing underlayment provides an extra layer of protection between your shingles and your roof deck. One roll of conventional 15 felt covers 432 square feet 40 1 m 2. Roofing felt is required to overlap 2 inches over the lower felt course. Purchase enough felt to cover your roof s area.

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. This gardner asphalt 15 432 sq. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below.

Unrolled length that combine to provide over 430 sq.