Standard House Roof Pitch

Today s standard ceiling height is nine feet.

Standard house roof pitch.

For example when the roof is denoted by six and twelve that means a roof that rises six inches each twelve level inches. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. Gable and other multi pitched roofs allow for lower primary structures with a corresponding reduction in framing and sheathing materials. Buffalo new york and montreal quebec canada specify 6 in 12 a pitch of approximately 26 6 degrees.

Citation needed carpenters frame rafters on an angle to pitch a roof. The table below shows common roof pitches and the equivalent grade degrees and radians for each. The terms are scientific in nature. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Greek says one must keep rafter length in range of 1 9 to 1 7 th of span but as per roman style the standard dimensions are kept about 1 3 to 2 9 th of span with an angle of 23 to 24 degree. 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. But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof. Minimum roof pitch for shingles.

The terms are slight different by which the roof pitches are symbolized. Commonly it is 3 4 th of span as per gothic rafter must be equal to span. Pitches above 9 12 are very highly angled and are designated steep slope roofs. The amount of vertical climb has for every twelve inches of lateral dimension by which roof pitches are represented.

Newer houses are often built with nine foot ceilings on the first floor and sometimes eight foot ceilings on the second story. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. The most commonly used roof pitches fall in a range between 4 12 and 9 12.