Minimum Pitch For Slope Roof

The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot.

Minimum pitch for slope roof.

The standard of lower pitch actually ranges between 1 12 to 5 12. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. The minimum requirement is 2 12. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. However roof pitch is technically measured and defined differently. That works out to about nine degrees if that works better for you. The metal roof minimum slope doesn t stray far from other building with different material.

I e 4 inches of rise per 12 inches one foot of run. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Note that roof pitch is sometimes used in parallel with roof slope. However you can only use this pitch with built up roofing or specialized synthetic roofing.

With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 20 0 for slate roofs. Shingles of all types need to have a slope to function properly.