Roof Slope 1 4 Over 12

The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run.

Roof slope 1 4 over 12.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. High and low pitch examples. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. 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.

If a roof rises 1 in a length of 12 this is 1 12 roof pitch. Roof pitch degree table. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope. Conventional roofs are the easiest to construct and you can walk on them safely.

They have a pitch ranging from 4 12 to 9 12. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. Most roof s have a pitch in the 4 12 to 9 12 range. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks.

This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. 1 12 roof pitch angle 4 76 degrees. 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. 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.

Generally such roofs have a pitch ranging from 1 2 12 to 2 12. 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. These roofs have a pitch less than 4 12. Image 1 12 to 12 12 roof pitch 7 12 pitch.

A 4 12 is a roof slope that rises by 4 inches for every 12 inches across. This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof. This will give you the rise over run or pitch.