Secure the shingle to the roof deck with fasteners as recommended by the roofing manufacturer.
Maximum roof pitch for shingles.
It is important for shingle roofs to function properly and one method of ensuring that this is achieved is to observe the pitch requirements for the shingles.
Metal shingles and wood shingles.
Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.
Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.
This means for every 12 horizontal units the roof must.
They won t be appropriate for all roofs.
Traditional 3 tab shingles made with asphalt composite are the most popular type of shingle and are the most flexible in terms of adapting to many roof pitches.
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 minimum requirement is 2 12.
Following is a review of code requirements and nrca s roof slope guidelines as well as some additional factors designers should consider.
Fortunately the requirements are quite accommodating.
There are plenty of other options however for flat and nearly.
Clay and concrete tile minimum roof slope roof pitch r905 3 2.
Degrees to pitch rise in run table.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
That works out to about nine degrees if that works better for you.
The roofing materials most often used for these pitches include asphalt composite shingles.
Also if asphalt shingles are installed on a roof slope of 2 12 to 4 12 it shall be provided with a double underlayment application.
Minimum and maximum roof slope limits vary based on specific roof system and project types.
So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run.
These shingles are appropriate for pitches as low as 4 12 pitch all the way up to a 12 12.
Shingles of all types need to have a slope to function properly.
The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.
Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater.
Roof pitch multiplier table.
Roof slope equivalents as rise.
And 4 12 minimum roof slope for slate and wood shakes.
If a roof slope exceeds this limitation the shingles should be applied by the following recommended method complying with astm d4586.
If you re having asphalt shingles put on your roof you will have to have a minimum slope.
Complete list of roofing types.
What is the minimum pitch slope of an asphalt shingle roof.
