Minimum Pitch For Slope Roof

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

Minimum pitch for slope roof.

That works out to about nine degrees if that works better for you. The minimum requirement is 2 12. However roof pitch is technically measured and defined differently. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.

However you can only use this pitch with built up roofing or specialized synthetic roofing. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot. The standard of lower pitch actually ranges between 1 12 to 5 12.

Note that roof pitch is sometimes used in parallel with roof slope. Shingles of all types need to have a slope to function properly. With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 20 0 for slate roofs. The metal roof minimum slope doesn t stray far from other building with different material.

What is the minimum pitch slope of an asphalt shingle roof. But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof.