Patio Roof Slope Ratio

Determine the minimum slope of the roof based on the roofing material.

Patio roof slope ratio.

Flat roofs which aren t perfectly flat require a small slope to allow for water runoff. 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. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. The minimum pitch for.

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. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Roof pitch calculator results explained. Typically you can use the industry standard ratio for fall of 1 80.

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. However this could differ depending on your project. Match roof material and use appropriate slope match the roofing on the covered porch with the main roof. Generally such roofs have a pitch ranging from 1 2 12 to 2 12.

You can divide roofs into these categories. In this example that means that the patio should fall 1 unit for every 80 units of distance.