Pitch Of A Roof Angle

There is no standard universal roof pitch.

Pitch of a roof angle.

Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Historically roof pitch was designated in two other ways. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. Commonly used roof pitches were given names such as greek.

The ridge height is 1 9 to 1 7th the span an angle of 12 5 to 16. Most roof s have a pitch in the 4 12 to 9 12 range. 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.

In the uk the typical house has a pitch between 40 50 although 45 should be avoided. Roof pitch degree table. Roof pitch slope roof angle degree 1 12 pitch. A ratio of the ridge height to the width of the building span and as a ratio of the rafter length to the width of the building.

Common roof pitches and equivalent grade degree and radian angles.