Roof Slope 1 4 Over 12

High and low pitch examples.

Roof slope 1 4 over 12. Conventional roofs are the easiest to construct and you can walk on them safely. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. They have a pitch ranging from 4 12 to 9 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.

These roofs have a pitch less than 4 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. Image 1 12 to 12 12 roof pitch 7 12 pitch. Most roof s have a pitch in the 4 12 to 9 12 range.

A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope. 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. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. 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.

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. Roof pitch degree table. For example if you measure 4 inches the pitch of your roof is 4 12. 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.

This will give you the rise over run or pitch. For every 12 horizontal feet the roof changes 8 feet in vertical height. The table below shows common roof pitches and the equivalent grade degrees and radians for each. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

1 12 roof pitch angle 4 76 degrees. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. If a roof rises 1 in a length of 12 this is 1 12 roof pitch.