Maximum Roof Pitch For Asphalt Shingles

The maximum slope considered suitable for normal shingle application is 45 degrees or 12 per foot.

Maximum roof pitch for asphalt shingles.

5 12 to 12 12 pitch. The minimum slope for an asphalt shingle roof is 2 12. 9 46 built up roof asphalt. Roofing material or system.

All asphalt shingle roofs with a pitch of 4 12 or more have an underlayment of 15 lb. Shingles of all types need to have a slope to function properly. Secure the shingle to the roof deck with fasteners as recommended by the roofing manufacturer. That works out to about nine degrees if that works better for you.

Minimum required slope x in 12 minimum required slope degrees asphalt shingles. Wood and slate shingles do not lock together as tightly as other types of shingles. Fortunately the requirements are quite accommodating. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

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. 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. 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.

The minimum requirement is 2 12. Why is 2 12 the minimum. For example if it is a very low slope water including snowmelt or. 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 2 12 number is rise over run or two units of vertical for every 12 units horizontal. There are plenty of other options however for flat and nearly. Considering the roof slope requirement is important. They won t be appropriate for all roofs.

Asphalt shingles do require that you have a minimum pitch to your roof. Asphalt felt paper that is tacked to the roof sheathing. In 12 0 25 in 12 1 19 built up roof coal tar pitch. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

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. Pitched roofs are most often associated with asphalt shingles although standing seam roofs are becoming ever more popular on pitched roofs as well. Nrca s recommended minimum roof slope guidelines for steep slope roof systems generally are greater at steeper inclines than those in the building code. 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.