Roof Slope 1 4 Over 12

If a roof rises 1 in a length of 12 this is 1 12 roof pitch.

Roof slope 1 4 over 12.

Image 1 12 to 12 12 roof pitch 7 12 pitch. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. This will give you the rise over run or pitch. Generally such roofs have a pitch ranging from 1 2 12 to 2 12.

The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. 1 12 roof pitch angle 4 76 degrees.

High and low pitch examples. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. For example if you measure 4 inches the pitch of your roof is 4 12. Conventional roofs are the easiest to construct and you can walk on them safely.

Roof pitch degree table. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks. The table below shows common roof pitches and the equivalent grade degrees and radians for each. 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.

A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope. They have a pitch ranging from 4 12 to 9 12. 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. These roofs have a pitch less than 4 12.

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. 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. 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.