The minimum requirement is 2 12.
Shingle roof slope.
That works out to about nine degrees if that works better for you.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
Shingles of all types need to have a slope to function properly.
For example if it is a very low slope water including snowmelt or rainwater drains slowly and this increases the chances of.
Once you enter the basic roof dimensions and enter the type of roof you will get a very accurate result telling you exactly the amount of shingles that are required to cover your new roof.
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.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
Why is 2 12 the minimum.
The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.
Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope.
This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units.
The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.
What is the minimum slope for an asphalt shingle roof.