For example if it is a very low slope water including snowmelt or.
Maximum roof pitch for asphalt shingles.
That works out to about nine degrees if that works better for you.
Minimum required roof slope for roofing materials.
If a roof slope exceeds this limitation the shingles should be applied by the following recommended method complying with astm d4586.
Asphalt felt paper that is tacked to the roof sheathing.
For asphalt shingle clay and concrete tile metal shingle slate and wood shake and shingle roof systems nrca recommends slopes of 4 12 or more.
In 12 0 25 in 12 1 19 built up roof coal tar pitch.
Asphalt shingles do require that you have a minimum pitch to your roof.
Wood and slate shingles are used in many of the same types of roofs as asphalt composite shingles but may not be appropriate for roofs near the lower end since they are more susceptible to leaking.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
Considering the roof slope requirement is important.
The maximum slope considered suitable for normal shingle application is 45 degrees or 12 per foot.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.
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.
If you re having asphalt shingles put on your roof you will have to have a minimum slope.
9 46 built up roof asphalt.
Why is 2 12 the minimum.
Nrca s recommended minimum roof slope guidelines for steep slope roof systems generally are greater at steeper inclines than those in the building code.
The minimum slope for an asphalt shingle roof is 2 12.
Secure the shingle to the roof deck with fasteners as recommended by the roofing manufacturer.
But shingle roofing is not watertight in the sense that standing water or wind driven water on a low slope roof can work its way up between the laps which is the reason for the minimum 2 12 slope.
18 43 asphalt shingles with special underlayment requirements 2 in 12.
The minimum requirement is 2 12.
There are plenty of other options however for flat and nearly.
Fortunately the requirements are quite accommodating.
Roofing material or system.
What is the minimum pitch slope of an asphalt shingle roof.
Wood and slate shingles do not lock together as tightly as other types of shingles.
Shingles can be fabricated from a wide range of materials such as asphalt least expensive to natural wood metal tiles and heavy slate most expensive.
Minimum required slope x in 12 minimum required slope degrees asphalt shingles.
5 12 to 12 12 pitch.
They won t be appropriate for all roofs.
Shingles of all types need to have a slope to function properly.
