How Much Roll Roofing Do I Need

Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30.

How much roll roofing do i need.

How many rolls of felt will you need roofing felt is sold by the roll. Place the top edge of the roofing along the chalk line. Cecil venturella march 3. Ft sbs self adhering cap sheet roll for low slope roofing in black liberty sbs self adhering cap sheet is a durable liberty sbs self adhering cap sheet is a durable modified bitumen membrane designed and manufactured to meet industry and code requirements.

Roll out and cut roll roofing to cover the length of the roof. Rolled roofing is easy to obtain and can be found at all home improvement stores. One roofing square equals to 100 square feet. For a slightly sloped roof use the concealed nail method shown.

The average roll of 15 pound roofing felt covers about 400 ft 2 or 4 squares while the average roll of 30 pound roofing felt covers about 200 ft 2 or 2 squares. You can find underlayment at. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. This should give you a 1 inch overhang on the eaves including the top edge.

Always double check with the roofing calculator to make sure that you have enough felt to cover the entire area of the roof. If the roof is sloped you can use the exposed nail method. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Roll roofing is often installed over bare wood sheathing or sheathing that has been painted with a primer.

One msr roofing roll is usually about 36 feet long by 36 inches wide. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. So in terms of quantity a roofing roll is about the size of one composite shingle square. Applying roofing felt first will better protect the sheathing against condensation as well as against leaking.

Outside of the u s a degree angle is typically used. Rolls of felt coverage for roofs is sold in rolls that are one square each. Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material. One square is equal to 100 square feet.

Use an underlayment under your rolled roofing for extra insulation and weather protection.