There are two basic types of felt.
Coverage of a roll of roofing felt.
So you have 1 900 square feet.
15lb felt covers 4.
Net membrane roll for low slope roofing in white gaf tri ply app granule is a strong resilient gaf tri ply app granule is a strong resilient membrane that is suitable for new or reroofing projects as well as for use as flashing.
Roofing felt is sold by the roll.
For instance a typical 2700 square foot home might require three rolls of synthetic underlayment compared to 14 rolls of no 30 felt to cover the same area.
Roll roofing is different.
15lb and 30lb felt.
To apply rolled roofing you ll need your roof measurements a broom chalk to mark lines a razor blade to cut the material roofing cement nails and a hammer to hold down the material.
It has just one layer so it goes on fast and can be installed by a homeowner.
Roofing felt commonly called tar paper is an important component of any roofing system.
Roofing felt is sold in rolls and the product label will give information on the area contained.
Visit your local hardware store and ask for enough rolled roofing to fit the area of your roof.
Safe synthetic underlayment is also advantageous for worker safety the surface of many synthetic roofing underlayments including those offered by owens corning features a variety.
When talking roofing materials.
Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30.
Divide the area of your roof by the area of the felt rolls you plan to use and allow an approximate 10 extra for waste.
A typical roof has three layers a felt layer and two layers of overlapping shingles.
A square is considered a 10 x10 area or a 100 square feet.
This membrane contains a core of nonwoven polyester mat that resists splits and tears.
A standard roll of 30 felt covers 216 square feet.
Rows are overlapped 2 inches not 6 inches.
One half the area of a roll of 15 felt which covers 432 square feet.
Using a roll of felt coverage or several rolls provides the roof with additional waterproofing and protects the wood sheathing of a roof until the installation of shingles is finished.