Slope, Pitch, Rise over Run

Jeff Brett The King

Rise Over Run Roof Pitch

If you’re new to the business of selling roofs, you may have heard the term “Slope” or “Pitch” around the sales office and wondered, “what’s that?”

Being the smart roofing salesperson you are, rather than open yourself up to ridicule from the crusty old veterans and know-it-all roofers, you decided to look online. Good for you. You’ll find a lot of good answers here.

The “Slope” or “Pitch” of a roof will tell you how steep the roof is. You may have heard that a roof is a 7 Pitch or that it has a 7/12 Slope.

In this example, the 7 means that the roof rises 7 inches for every 12 inches it runs out. Similarly, an 8/12 or 8 Pitch roof rises 8 inches for every 12 inches it runs.

Roofs that are 4/12, 5/12 and 6/12 are usually fairly easy to walk on. They don’t rise very fast. Most insurance companies consider anything 7/12 or greater to be a steep pitched roof. Because it is steep, it is more difficult to work on and they will generally pay a premium to get the roof replaced.

For more information and to better understand “Slope”, “Pitch” and “Rise over the Run”, try this excellent resource from