Patio Roof Slope Ratio

Often you express roof pitch as the ratio between the rise and the run in the form of x 12.

Patio roof slope ratio.

Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. The minimum pitch for. Typically you can use the industry standard ratio for fall of 1 80. Determine the minimum slope of the roof based on the roofing material.

This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Flat roofs which aren t perfectly flat require a small slope to allow for water runoff.

So in this example to find the fall you need to divide the distance run by 80. Generally such roofs have a pitch ranging from 1 2 12 to 2 12. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. A roof slope of greater than 7 12 such as slopes between 8 12 to 12 12 is where the air dynamic issues start to arise requiring additional roof bracing to help mitigate the higher overall profile of the roof.

However this could differ depending on your project. Roof pitch calculator results explained.