Patio Roof Slope Ratio

Generally such roofs have a pitch ranging from 1 2 12 to 2 12.

Patio roof slope ratio.

Roof pitch calculator results explained. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. In this example that means that the patio should fall 1 unit for every 80 units of distance. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.

So in this example to find the fall you need to divide the distance run by 80. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. However this could differ depending on your project. Determine the minimum slope of the roof based on the roofing material.

The minimum pitch for. Flat roofs which aren t perfectly flat require a small slope to allow for water runoff. You can divide roofs into these categories. 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.

Typically you can use the industry standard ratio for fall of 1 80. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.