Asphalt shingle manufacturers will warrant shingles installed on roof slopes as low as 2 12 when these special installation procedures are followed.
2 12 roof asphalt shingles.
Self sticking rubberized asphalt products like grace ice water shield are acceptable but expensive substitutes for 15 felt.
What precautions need to be taken to install shingles.
Installation on roof slopes below a 2 in 12 pitch is not recommended at all.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
The first thing to know about your roofing project.
Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
Everything can be done at a distance.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
Thanks to digital technology all of your decisions and interactions from selecting the right roofer to choosing a shingle to paying the contractor can be done at a distance.
What is the minimum pitch slope of an asphalt shingle roof.
The minimum requirement is 2 12.
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And your family can remain in the home during the installation or repair.
A roof slope of 2 12 up to but not including 4 12 is considered as low in residential construction.
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.
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The asphalt shingle manufactures recommend that you install asphalt shingles on a recommended minimum of 4 in 12 or greater however most manufactures will warrant their shingles down to a 2 in 12 pitch if the recommended installation method is used.
Shingles of all types need to have a slope to function properly.