That works out to about nine degrees if that works better for you.
Shingle roof slope.
Why is 2 12 the minimum.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
The minimum requirement is 2 12.
The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.
The roof shingle calculator is a free estimator that serves a useful purpose during any roof repair or replacement project.
Considering the roof slope requirement is important.
Shingles of all types need to have a slope to function properly.
This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units.
Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
For example if it is a very low slope water including snowmelt or rainwater drains slowly and this increases the chances of.
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.
What is the minimum slope for an asphalt shingle roof.