Maximum Roof Pitch For Shingles

Asphalt shingles do require that you have a minimum pitch to your roof.

Maximum roof pitch for 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. And 4 12 minimum roof slope for slate and wood shakes. Roof pitch multiplier table. Minimum and maximum roof slope limits vary based on specific roof system and project types.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Fortunately the requirements are quite accommodating. Roof slope equivalents as rise. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

Secure the shingle to the roof deck with fasteners as recommended by the roofing manufacturer. The minimum requirement is 2 12. Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. This means for every 12 horizontal units the roof must.

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. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. These shingles are appropriate for pitches as low as 4 12 pitch all the way up to a 12 12.

There are plenty of other options however for flat and nearly. 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. So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run.

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. If you re having asphalt shingles put on your roof you will have to have a minimum slope. Degrees to pitch rise in run table. The roofing materials most often used for these pitches include asphalt composite shingles.

That works out to about nine degrees if that works better for you. Metal shingles and wood shingles. If a roof slope exceeds this limitation the shingles should be applied by the following recommended method complying with astm d4586. Clay and concrete tile minimum roof slope roof pitch r905 3 2.

What is the minimum pitch slope of an asphalt shingle roof. Asphalt shingles continue to be the most widely installed roof covering option in north america. Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. Complete list of roofing types.

Shingles of all types need to have a slope to function properly.