Standard House Roof Slope

Contemporary houses often have flat roofs which shouldn.

Standard house roof slope.

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. But the size of pitch and type of slope depends upon so many factors including weather conditions of area as well as style of house. A mansard roof is a four sided gambrel roof with each side having a double slope of one steep slope and one shallow upper slope.

What is the standard pitch for a roof. Most roof s have a pitch in the 4 12 to 9 12 range. This is the distance between trusses. A standard roof pitch ensures perfect safety to construction because it creates effective water drainage mechanism.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. The standard roof truss spacing is 2. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. There is no standard universal roof pitch roof pitch varies depending on culture climate style and available materials in the usa the range of standard pitches is anywhere between 4 12 and 9 12 in the uk the typical house has a pitch between 40 50 although 45 should be avoided.

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. Although there is no single standard roof pitch used on all sloped roofs factors such as roofing materials and local climate help to determine the appropriate range of pitches for a given building. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing 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.

Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. Thus pitch is typically greater in areas of high rain or snowfall. In degrees 10 2 in 12 or 1 in 6 is considered a minimum. The exact roof slope in degrees is given by the arctangent.

You will also incur additional costs because it is much harder to deck and shingle a roof that is 12 12 pitch versus a 4 12 roof.