Roof Pitch Required For Shingles

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Roof pitch required for shingles.

Determine the minimum slope of the roof based on the roofing material. Metal roof shingles require a minimum roof pitch of 3 12 or greater. Let us recap on the minimum roof pitch required for each type of roofing material. Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater.

To calculate the size of the roof you need to measure the size of the roof as if it were flat account for roof pitch calculate square footage and finally determine how many squares of material are required for the roof the calculator above can handle all of this simply enter the length width and pitch and it will determine the size of the roof in squares. 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. How roof pitch determines suitable roofing systems. Roofing underlayment or felt is usually required for the ul fire rating to apply since shingles are usually tested with underlayment.

Asphalt shingles require a minimum roof pitch of 2 12 or greater. Flat and nearly flat roofs a pitch of 1 in 12 or 2 in 12 cannot be covered with shingles or shakes of any material since there is not enough angle to combat the danger of blow off. We do install shingles on these in between pitches but special application measures must be taken in this middle ground. Low sloped roof shingle installation.

The roof deck should be sound and level before laying the underlayment. Asphalt shingles continue to be the most widely installed roof covering option in north america. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The minimum pitch for a.

Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. A square of shingles will be the amount needed to cover an area of 100 square feet.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. Fifteen pound or heavier felt underlayment is required by code in some areas. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. The shingle bundles will be plastic or paper wrapped bundles that are made to be light enough for a single person to carry.