Pitch Of Roof

Roof pitch refers to the slope which the rafter creates.

Pitch of roof.

There is no standard universal roof pitch. Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run. First measure 12 inches from one end of the level and make a mark. The most commonly used roof pitches fall in a range between 4 12 and 9 12.

In the uk the typical house has a pitch between 40 50 although 45 should be avoided. 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. The rafter length is 3 4 the span about 48. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

Technically roof pitch is the ratio of total vertical roof height the rise to total horizontal distance from wall to wall the span. How to measure roof pitch to measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. The ridge height is 2 9ths to 1 3 the span an angle of 24 to 34. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled.

Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. The ridge height is 1 9 to 1 7th the span an angle of 12 5 to 16. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Pitch angle incline slope they all can be used to refer to the steepness of a roof.

Although most homeowners do not need to measure pitch it still pays to understand this term. Pitches above 9 12 are very highly angled and are designated steep slope roofs. In the usa the range of standard pitches is anywhere between 4 12 and 9 12. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof.

Roof pitch varies depending on culture climate style and available materials.