Roof Slope For Shingles 2 12

The minimum requirement is 2 12.

Roof slope for shingles 2 12.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Shingles of all types need to have a slope to function properly. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle.

Why is 2 12 the minimum. That works out to about nine degrees if that works better for you. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 9 46 built up roof asphalt. For example if it is a very low slope water including snowmelt or. In 12 0 25 in 12 1 19 built up roof coal tar pitch.

The roof pitch between 2 12 and 4 12 is considered as a low pitch roof so shingles can be installed in the roof slope between 2 12 and 4 12. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. Minimum required roof slope for roofing materials. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units.

Minimum required slope x in 12 minimum required slope degrees asphalt shingles. With respect to shingle application roof slopes from 2 12 to less than 4 12 18 5 are called low slope roofs while roof slopes of 4 12 or greater are called normal or standard slopes. 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. 18 43 asphalt shingles with special underlayment requirements 2 in 12.

A shingle roof like this north dallas garage in the photo above may have a failure no matter how good a job the installer did. For every 12 horizontal feet the roof changes 8 feet in vertical height. Roofing material or system. Roof pitch basics a 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance.

For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. Simply put it s a shallow roof. The cabo one and two family dwelling code permits the installation of asphalt shingles on roofs with a slope as low as 2 12 if the shingles are double coverage self sealing versions. Considering the roof slope requirement is important.

High and low pitch examples. What is the minimum slope for an asphalt shingle roof. A corresponding editor paul fisette replies. Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope.