1 In 3 Roof Slope

The minimum roof slope for metal roof panels depend on 3 different scenarios.

1 in 3 roof slope.

The table shows the equivalent ways of expressing the same roof pitch slope. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. And pitch is a fraction derived by dividing the rise by the entire span. Roof slopes in degrees percentage and rise in run rise over run.

That s the same as a 14 degree slope or a 25 slope. Where convenient the least common multiple is used e g a 3 in 4 slope for a 9 in 12 or 1 in 1 1 3. Roof pitch refers to the slope which the rafter creates. This page also explains how to convert one to another.

Remember slope is expressed as a ratio and in inches per foot. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope. Roof slope equivalents as rise. Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

Slope conversion tables 1 4 1 2 3 4 1 1 1 4 1 1 2 1 3 4 2 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 0 25 0 50 0 75 1 00 1 25 1 50 1 75 2 00 2 25 3 4 5 6 7 8 9 10. Some sources consider low slope to include 3 12 pitch roofs. These solar roof tiles will forever change the roofing and construction industry at a rate unseen since the introduction of the 3 tab asphalt shingle some 80 years ago. Low slope roofs are from 0 to 3 12 in pitch.

The following table provides the minimum. Places that use metric measurement systems use a degree angle or what fall there is per unit of run and expressed as a 1 in slope a 1 in 1 equals 45. If the pitch is 1 3 the slope is 8 12. Why is the roof slope 25.

3 of rise per 12 of run is the same as 1 of rise per 4 of run or 1 4 25. If the slope is 4 12 the pitch for the 24 foot span is 1 6. 3 in 1 roof uniquely joins together insulation extreme wind protection and solar power.