Roof Slope 1 4 Over 12

Conventional roofs are the easiest to construct and you can walk on them safely.

Roof slope 1 4 over 12.

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. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. For example if you measure 4 inches the pitch of your roof is 4 12. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep.

Generally such roofs have a pitch ranging from 1 2 12 to 2 12. They have a pitch ranging from 4 12 to 9 12. 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 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. High and low pitch examples. On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

1 12 roof pitch angle 4 76 degrees. For every 12 horizontal feet the roof changes 8 feet in vertical height. 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. Most roof s have a pitch in the 4 12 to 9 12 range.

If a roof rises 1 in a length of 12 this is 1 12 roof pitch. This will give you the rise over run or pitch. Roof pitch degree table. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks.

Image 1 12 to 12 12 roof pitch 7 12 pitch. 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. 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.