SLOPE FACTOR CHART

When outfitting your residential or commercial structure with roofing materials from Everlast Roofing, Inc., it’s important to know the incline, or pitch, of your roof. Pitch is expressed as a ratio of the vertical rise to the horizontal span. In order to know what type of materials will work best for your project and the amount of materials required, you’ll need to find out the pitch of your roof.

Measuring Roof Pitch

To obtain an accurate roof pitch measurement, properly measure the rise and run. Using a tape measure, make a pencil mark 12 inches from the end of a carpenter’s level. Then, you’ll be able to measure slope from an unfinished attic space under the roof. 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. This will give you the rise over run, or pitch. For example, if you measure 4 inches, the pitch of your roof is 4:12.

Finding The Slope And Hip & Valley Factor

Once you’ve figured out the pitch of your roof, you can consult the following chart to discover the slope factor and hip & valley factor.

For the PDF Version of this chart please click here


Pitch of Roof Slope Factor Valley & Hip Factor
1:12 1.0035 1.4167
2:12 1.0138 1.4240
3:12 1.01308 1.4362
4:12 1.0541 1.4530
5:12 1.0833 1.4743
6:12 1.1180 1.5000
7:12 1.1577 1.5298
8:12 1.2019 1.5635
9:12 1.2500 1.6008
10:12 1.3017 1.6415
11:12 1.3566 1.6853
12:12 1.4142 1.7320

For product recommendations based on the slope of your roof, contact an Everlast sales representative today. We’ll be happy to discuss your options, as well as answer any questions you may have regarding Everlast roofing products.

Slope Factor Reference A
Slope Factor Reference A