How Much Roof Pitch For Shingled Roof With Synthetic Underlayment

Fowler homes includes an option for upgrading to synthetic underlayment on every roof replacement we quote.

How much roof pitch for shingled roof with synthetic underlayment.

The pitch of the roof is the rise over a 12 inch run. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. Apr 18 2015 m said. Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.

For roof slopes of four units vertical in 12 units horizontal 33 percent slope or greater underlayment shall be a minimum of one layer of underlayment felt applied shingle fashion parallel to and starting from the eaves and lapped 2 inches 51 mm fastened only as necessary to hold in place. I have a roof with a 2 12 pitch. Low sloped roof shingle installation. Of course this price can be much different depending on the application so make sure you get an exact price for upgrading.

Roof pitch area multipliers. 100 1 054 105 4ft 2. For example a 4 12 pitch roof that is 100 square feet. There is rolled asphalt paper on it now that is rippling.

The roof has had prior leakage problems for the former owner. A roll of 90 pound felt will cost in the neighborhood of 50. If 4 12 and above is normal and 2 12 is minimum what about properties with roofs in between the two such as a 3 12 pitched roof. The tear off is going to rip up much of the old felt underlayment.

Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. Roofing felt is required to overlap 2 inches over the lower felt course. Normal roof slope for typical installation. Roll roofing will cost about half of what a shingled roof will cost and can be installed as a diy project but do not expect this roofing material to last much beyond 10 years.