Standard Roof Pitch Angle Uk

Some of the most common roof pitch types are conventional slope type roofs designed with pitch ranging from 4 12 to 9 12.

Standard roof pitch angle uk. The most commonly used roof pitches fall in a range between 4 12 and 9 12. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. These are utilized in residential applications.

A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Roof pitch and corresponding angles.

As aforementioned there is no standard pitch of a roof. Roof pitches exceeding the level of 9 12 or approximately 37 degrees are termed steep slope roofs. Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the corresponding horizontal distance or run you write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run. So if your roof rises 4 inches for every 12 inches of horizontal length then the pitch of your roof is expressed as 4 12.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. This steep pitch is also an essential ingredient of cottage style. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.

Pitches above 9 12 are very highly angled and are designated steep slope roofs. It is often compared to slope but is not exactly the same. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. Outside of the u s a degree angle is typically used.

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

On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length.