How Steep Should A Roof Be

You can also divide the rise over run multiply by 100 and get a percentage.

How steep should a roof be.

A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible. Pitched roofs including gabled and hipped roofs are the most common types in the united states. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. 2 12 4 12 conventional slope roof.

Definitions vary on when a roof is considered pitched. A flat roof would have a 2 12 pitch while the average roof pitch would be between 4 12 and 9 12. Any pitch higher than 9 12 is considered a steep pitch. In degrees 10 2 in 12 or 1 in 6 is considered a minimum.

9 12 20 12 steep slope. The slope of a roof has an effect on the interior volume of a building the drainage. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. So the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally.

If a roof increases in height by three inches for every foot of horizontal run it is considered to have a 3 in 12 pitch or just a 3 pitch the primary purpose of pitching a roof is to redirect water and snow. Roof slope is a very important aspect and it is considered the primary factor in roof design. However in general terms low slope roofs commercial roofs are those below 2 12 or 3 12 while steep slope roofing would consists of roof pitches above either 2 12 or 3 12 and higher.