Minimum Slope For Wood Shingle Roof

Shingle exposures for wood roofs.

Minimum slope for wood shingle roof.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Some people recommend not installing asphalt shingles on slopes below 5 12 but a skilled roofer may well be able to make this work. If 4 12 and above is normal and 2 12 is minimum what about properties with roofs in between the two such as a 3 12 pitched roof. The function of the roof in weather and the environment determines the minimum pitch for a roof.

Wood shakes minimum roof slope roof pitch r905 8 2. Normal roof slope for typical installation. The minimum slope for an asphalt shingle roof is 2 12. For example a shingle roof in a snowy region could be 2 12 but it is better to have a steeper.

This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. For example if it is a very low slope water including snowmelt or. Considering the roof slope requirement is important. Wood shakes can only be installed on roof slopes of 3 12 or greater 25 slope.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The maximum weather exposure for wood shakes or wood shingles depends on the shingle size and the slope or pitch of the roof. Asphalt shingles continue to be the most widely installed roof covering option in north america. 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.

Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. Underlayment for asphalt shingles clay and concrete tile metal roof shingles mineral surfaced roll roofing slate and slate type shingles wood shingles wood shakes and metal roof panels shall conform to the applicable standards listed in this chapter. Nrca s recommended minimum roof slope guidelines for steep slope roof systems generally are greater at steeper inclines than those in the building code. Built up roofs minimum roof slope roof pitch r905 9 1.

Low sloped roof shingle installation. Underlayment materials required to comply with astm d226 d1970 d4869 and d6757 shall bear a label indicating compliance to the standard. Allowable shingle exposure may also vary by the shingle grade something that you might infer by visual inspection of the shingles matching against wood shingle grade definitions or. Why is 2 12 the minimum.

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. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.