How Much Roof Tar Do I Need

If your roof pitch is 3 12 or 4 12 multiply by 1 25.

How much roof tar do i need.

Multiply the total area determined in step one by a correction factor to account for the roof pitch. This correction factor will take into account the greater area of the roof due to the pitch. The 15 type is most commonly used and one roll of 15 underlayment covers 4 squares. Consider other underlayment options as needed such as rubber or tar products.

Use a ladder to reach the bottom level. You can usually return it if you don t need it. If the slope is between 3 12 and 4 12 double the amount and put down 2 layers. The answer is the number of square feet of roofing tar paper you need to purchase.

For roof pitches of 5 12 to 7 12 use a factor of 1 3. Determine the number of rolls of underlayment needed. Gaf timberline hdz charcoal algae resistant laminated high definition shingles 33 33 sq. I would agree that there is no urgent need to fix it.

Buy about 10 percent extra. Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30. Feel free to consult with a roofing specialist about your options. You can apply roofing tar to a slanted roof if you want but there typically is not much need.

If you re using 15 underlayment and your roof slope is greater than 4 12 use 1 layer. If the asphalt calculator outputs you require 10 tons of asphalt you should instead purchase 10 5 or 11 tons to be on the safe side and avoid unnecessarily high transportation costs. Use 1 4 for up to a 9 12 pitch. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.

Roofing felt is a layer of tar paper installed beneath the shingles to provide a backup waterproof membrane in case of leakage. 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. The following article will help you understand the process for doing this yourself. What s more if you are considering buying a property with this type of flat roofing walk on the roof yourself to see how it feels under your feet.