Tips on Measuring for Roofing
To accurately calculate the area of your roof, you must first determine its slope, or pitch.
Roof pitches are described in terms of rise and run. The run is the distance from the outside
edge of a perimeter stud wall to the center of the house. The rise is the distance from the
top of a stud wall to the peak of the roof.
A roof’s pitch is determined by how much it rises for every foot it runs.
Thus, a moderate 6 in 12 roof pitch means the roof rises 6 inches for every 12
horizontal inches it runs. A 12 in 12 pitch is a steep, 45-degree angle roof.