Make Roof Pitch Steep

A flat roof would have a 2 12 pitch while the average roof pitch would be between 4 12 and 9 12.

Make roof pitch steep.

Most roof s have a pitch in the 4 12 to 9 12 range. Pitch is the slope or angle from the wall plate to the roof ridge line. Single ply or torch down roof structures are made specifically for flatter rooftops and cannot be used when building a steeper roof. The pitch of the roof is determined by the vertical rise in inches for every horizontal twelve inch length.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. So if your roof rises 4 inches for every 12 inches of horizontal length then the pitch of your roof is expressed as 4 12. Pitch can vary a great deal from a shallow slope up to a very steep pitch. Any pitch higher than 9 12 is considered a steep pitch.

Which is equal to 1 4 or 1 3 the total span of the building not counting any overhang. Pitch is a measure of the steepness of a roof. 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. A roof with a pitch of less than 5 has a shallow slope and a roof pitch of more than 8 appears to have a steep slope.

A roof that slopes upward vertically 6 inches for every 12 inches measured horizontally is said to have a 6 pitch a vertical rise of 8 inches per foot is an 8 pitch and so on. The way pitch also known as roof slope is measured is rise over run. Pitch for a gable roof the most common is generally 1 4 or 1 3.