Roof Asphalt Shingles Requirements

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

Roof asphalt shingles requirements.

Installation temperature requirements for asphalt shingle roofs ideally shingles should be installed at temperatures ranging from 40 f to 85 f. They won t be appropriate for all roofs. Fortunately the requirements are quite accommodating. Asphalt shingles do require that you have a minimum pitch to your roof.

The slope of the roof is measured by the vertical rise of the roof to the horizontal run and is expressed as a fraction. 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. Imbed each step flashing in a 75 mm 3 wide application of asphaltic plastic cement and nail in place. Asphalt shingles continue to be the most widely installed roof covering option in north america.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Each flashing should overlap the one below by at least 75 mm 3 but not be visible below the shingle top lap. 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.

A 4 12 roof slope means the roof rises 4 feet for every 12 feet of horizontal roof span.