What is the minimum pitch slope of an asphalt shingle roof.
Min roof slope for asphalt shingles.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
The minimum slope for an asphalt shingle roof is 2 12.
That works out to about nine degrees if that works better for you.
A roof slope of 2 12 up to but not including 4 12 is considered as low in residential construction.
Minimum required slope x in 12 minimum required slope degrees asphalt shingles.
Considering the roof slope requirement is important.
Asphalt shingles minimum roof slope roof pitch r905 2 2.
Minimum required roof slope for roofing materials.
Asphalt felt paper that is tacked to the roof sheathing.
Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch.
Asphalt shingles can only be installed on roof slopes of 2 12 or greater.
For example if it is a very low slope water including snowmelt or.
Minimum slope for asphalt shingles.
There are differing opinions as to the minimum slope for a roof but the generally accepted minimum is 3 12.
Roofing material or system.
Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12.
What slope is considered low slope for shingles.
Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work.
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 low slopes as well as any other slope your local building department should be contacted.
This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.
What precautions need to be taken to install shingles on low slopes.
For those who don t understand the roof pitch number here is a way to envision it.
The requirements for an asphalt shingles roof are contained in the international building code.
18 43 asphalt shingles with special underlayment requirements 2 in 12.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
Why is 2 12 the minimum.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
According to this code the minimum slope for asphalt shingles is 17 degrees or two vertical units to twelve units in the horizontal.
The minimum requirement is 2 12.
Shingles of all types need to have a slope to function properly.
This number corresponds to the number of inches of rise in a 12 foot run.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
9 46 built up roof asphalt.
