Determining Roof Slope

The height of your roof, based on its width is known as the slope or pitch of the roof.  This number is expressed as a ratio of height versus width for every 12-inches.  If a roof rises 7-inches for every 12" in width it is said to have a slope or pitch of 7-inches.  It can also be expressed as 7 in 12.

How To Measure Roof Slope:

Mark a level at a point 12-inches from the end.  Place the end of the level against the roof and adjust it so that the bubble is level.  Using a tape measure, measure the height from the roof to the point on the 12-inch point that you have marked on the level.  This will provide you with the slope number of your roof.