Roof Slope For Shingles 2 12

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.

Roof slope for shingles 2 12.

Shingles that are not self sealing must be hand sealed with asphalt roofing cement. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. Roof pitch basics a 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. The minimum requirement is 2 12.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 9 46 built up roof asphalt. What is the minimum slope for an asphalt shingle roof. Simply put it s a shallow roof.

Why is 2 12 the minimum. 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. Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope. Asphalt shingles continue to be the most widely installed roof covering option in north america.

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. Minimum required slope x in 12 minimum required slope degrees asphalt shingles. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle.

A corresponding editor paul fisette replies. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. That works out to about nine degrees if that works better for you. Shingles of all types need to have a slope to function properly.

High and low pitch examples. 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. For example if it is a very low slope water including snowmelt or. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.

Roofing material or system. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. 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. Minimum required roof slope for roofing materials.

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. Considering the roof slope requirement is important. 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. The minimum slope for an asphalt shingle roof is 2 12.