Roof Asphalt Shingles Requirements

They won t be appropriate for all roofs.

Roof asphalt shingles requirements.

Asphalt shingles do require that you have a minimum pitch to your roof. Fasteners for asphalt shingles shall be galvanized stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 2 67 mm shank with a minimum 0 375 inch diameter 9 5 mm head of a length to penetrate through the roofing materials and a minimum of 0 75 inch 19 1 mm thick the nails shall penetrate through the sheathing. Fortunately the requirements are quite accommodating. Imbed each step flashing in a 75 mm 3 wide application of asphaltic plastic cement and nail in place.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Each flashing should overlap the one below by at least 75 mm 3 but not be visible below the shingle top lap. There are two simple rules to follow. Installation temperature requirements for asphalt shingle roofs ideally shingles should be installed at temperatures ranging from 40 f to 85 f.

A 4 12 roof slope means the roof rises 4 feet for every 12 feet of horizontal roof span. Asphalt shingles continue to be the most widely installed roof covering option in north america. Asphalt shingles can only be used on roof slopes of two units vertical in 12 units horizontal 2 12 or greater. Above 85 f it is easy to tear the shingles or mar the granular coating.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.