Roof Pitch Required For Shingles

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Roof pitch required for shingles.

What is the minimum slope for an asphalt shingle roof. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. We do install shingles on these in between pitches but special application measures must be taken in this middle ground. 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 following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Fifteen pound or heavier felt underlayment is required by code in some areas. Metal roof shingles require a minimum roof pitch of 3 12 or greater. The shingle bundles will be plastic or paper wrapped bundles that are made to be light enough for a single person to carry.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. Asphalt shingles continue to be the most widely installed roof covering option in north america. However shingles are packaged in a way that they are light enough for the average person to carry around. Roofing underlayment or felt is usually required for the ul fire rating to apply since shingles are usually tested with underlayment.

The minimum pitch for a. Low sloped roof shingle installation. The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run. How roof pitch determines suitable roofing systems.

Asphalt shingles require a minimum roof pitch of 2 12 or greater. Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater. Determine the minimum slope of the roof based on the roofing material. 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.

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. Let us recap on the minimum roof pitch required for each type of roofing material. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.