Roof Slope 1 4 Over 12

For every 12 horizontal feet the roof changes 8 feet in vertical height.

Roof slope 1 4 over 12.

This will give you the rise over run or pitch. Image 1 12 to 12 12 roof pitch 7 12 pitch. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks.

If the rise is 6 inches for every 12 inches of run then the roof slope is 6 in 12 the slope can be expressed numerically as a ratio. Generally such roofs have a pitch ranging from 1 2 12 to 2 12. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. If a roof rises 1 in a length of 12 this is 1 12 roof pitch.

These roofs have a pitch less than 4 12. Roof pitch degree table. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

They have a pitch ranging from 4 12 to 9 12. High and low pitch examples. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope. 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.

For example if you measure 4 inches the pitch of your roof is 4 12. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. Conventional roofs are the easiest to construct and you can walk on them safely. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

Slope conversion tables 1 4 1 2 3 4 1 1 1 4 1 1 2 1 3 4 2 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 0 25 0 50 0 75 1 00 1 25 1 50 1 75 2 00 2 25 3 4 5 6 7 8 9 10. Most roof s have a pitch in the 4 12 to 9 12 range. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter.