Rise Over Run Roof

That s the same as a 14 degree slope or a 25 slope.

Rise over run roof.

The rise is the distance from the top of the roof to the bottom. On a 38 degree sloping roof angle t each individual vertical rise of 9 4 y 1 would have a horizontal run x 1 of 12 inches. Last updated july 10 2020 the following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. The horizontal change in distance or the horizontal distance covered by an un supported rafter or truss.

A 3 in 12 roof rises 3 for every 12 of run. This will give you the rise over run or pitch. Total roof rise or change in elevation for a 38 degree sloping roof angle t with one giant rise or step of 7 8 feet to the center of the attic y 2 would have total a run x 2 of 10 feet. Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree.

The run is the distance from the outside of the wall to the inside of the ridge. For example if you measure 4 inches the pitch of your roof is 4 12. Here is an online rise and run calculator which helps to calculate pitch slope and angle with the help of rise and run values. Why is the roof slope 25.

3 of rise per 12 of run is the same as 1 of rise per 4 of run or 1 4 25. In roof pitch calculator pitch value can be obtained by dividing n by 12 and divide s by the answer. Pitch is written assuming a run of a foot or 12 inches so the ratio describes how much the roof rises for every foot of its run.