1 12 Roof Pitch Shingles

Additional underlayment protection with special application methods are required when asphalt shingles are installed on a low slope roof following the manufacturer s application instructions.

1 12 roof pitch shingles.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Flat and nearly flat roofs a pitch of 1 in 12 or 2 in 12 cannot be covered with shingles or shakes of any material since there is not enough angle to combat the danger of blow off. A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely makes the cut off for one of the most popular roofing material options. Asphalt shingles continue to be the most widely installed roof covering option in north america.

Metal roof shingles require a minimum roof pitch of 3 12 or greater. Wood shingles require a minimum roof pitch of 3 12 or greater. For that reason flat roofs are limited to these types of covering materials. Clay or cement tiles can be used on a wide range of roof pitches.

For pitches of 2 5 12 up to 4 12 the roof requires double underlayment. Asphalt shingles should never be applied to roof slopes below 2 12 2 of vertical rise for every 12 of horizontal run or 9 5. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Slate and slate type shingles require a minimum roof pitch of 4 12 or greater.

Wood shakes require a minimum roof pitch of 3 12 or. 4 12 to 20 12 pitches. Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater. 1 12 pitch roof if this is a porch on a trailer use corrugated sheet material can be found at lowes.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle.