Common Roof Pitch Angles Used By Builders Uk

In the roofing trade the go to term is pitch and it is expressed in terms of 12 inches so the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally.

Common roof pitch angles used by builders uk.

In the uk the typical house has a pitch between 40 50 although 45 should be avoided. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle. This image shows a relatively shallow roof pitch of 15 degrees. Some of the most common roof pitch types are conventional slope type roofs designed with pitch ranging from 4 12 to 9 12.

Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. Roof pitch varies depending on culture climate style and available materials. 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. Thus a 4 12 pitch would be a 33 slope.

Modern residential hip roof construction uses common pitch ratios in general. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. Clay or cement tiles can be used on a wide range of roof pitches. These are utilized in residential applications.

You can also divide the rise over run multiply by 100 and get a percentage. This steep pitch is also an essential ingredient of cottage style. There is no standard universal roof pitch. A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible.

The most common hip roof pitch ratios fall between 4 12 and 6 12 although variations occur based on factors such as snow rain and wind conditions which is because steeper hip roof pitch ratios allow for less accumulations of snow and rain on the roof and lower ratios provide less wind resistance. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Common roof pitches the most commonly used roof pitches fall in a range between 4 12 and 9 12. This home was thatched by dodson brothers image credit.

Thatch is used occasionally on new dwellings and demands a roof pitch of at least 45 and more likely 50 to allow the rain to flow off quickly and prevent ingress. Roof pitches exceeding the level of 9 12 or approximately 37 degrees are termed steep slope roofs. In the usa the range of standard pitches is anywhere between 4 12 and 9 12. 4 12 to 20 12 pitches.

A 4 12 pitch is around 18 5 degrees but not exactly. Pitched roofs can also be used to incorporate roof lights angled in a specific direction or dormer windows. The loft space would be much larger with a roof pitch of 45 degrees.