Nominal Roof Pitches

In the uk the typical house has a pitch between 40 50 although 45 should be avoided.

Nominal roof pitches.

Select inches to enter decimal inches or millimeters for metric. A roof s pitch is determined by how much it rises for every foot it runs. The most commonly used roof pitches fall in a range between 4 12 and 9 12. Clay or cement tiles can be used on a wide range of roof pitches.

A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. In the usa the range of standard pitches is anywhere between 4 12 and 9 12. Roof pitch varies depending on culture climate style and available materials. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs.

4 12 to 20 12 pitches. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. Pitch angle incline slope they all can be used to refer to the steepness of a roof. Roofers express roof slope as rise or pitch measured in inches of vertical rise per foot of horizontal distance or run.

If a roof or ramp rises 4 in a length of 12 the pitch is 4 in 12 which is 18 43 or 33 33 grade enter base length to calculate rise and diagonal for current pitch angle. 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. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. A 12 in 12 pitch is a steep 45 degree angle roof. Thus a moderate 6 in 12 roof pitch means the roof rises 6 inches for every 12 horizontal inches it runs. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Directly measure roof pitch angle and calculate pitch and angle on phone or tablet. There is no standard universal roof pitch. Pitches above 9 12 are very highly angled and are designated steep slope roofs.

A 12 in 12 pitch is a steep 45 degree angle roof. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle. See the image below for more explanation on rise run and pitch.