How Steep Should A Roof Be

So the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally.

How steep should a roof be. 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. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. The slope of a roof has an effect on the interior volume of a building the drainage.

A 4 12 pitch is around 18 5 degrees but not exactly. You can also divide the rise over run multiply by 100 and get a percentage. A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible. A flat roof would have a 2 12 pitch while the average roof pitch would be between 4 12 and 9 12.

2 12 4 12 conventional slope roof. The exact roof slope in degrees is given by the arctangent. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. Thus a 4 12 pitch would be a 33 slope.

Pitched roofs including gabled and hipped roofs are the most common types in the united states. 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.