Roof Area Conversion Factors

When outfitting your residential or commercial structure with products from everlast roofing it s important to know the incline or pitch of your roof.

Roof area conversion factors.

Now you re ready to price out the materials. For roof slopes expressed as x in 12 rise in run the roof pitch multiplier is determined by finding the square root of rise run 1. Pitch of roof slope factor valley hip factor. Take your area result and multiply it by the pitch multiplier or slope correction factor found in the table above to arrive at the roof s surface area.

Feet the area of a hip roof equals the area of a gable roof with the same dimensions. A 10 slope roof should not be confused with a 10 pitch roof as a 10 slope roof means that the roof rises by ten inches for every foot of run. You can consult the following chart to discover the slope factor and hip valley factor. Enter 6 into the calculator slope factor 1 1180 multiply the roof length by the gable wall length 40 24 960 multiply this amount by the slope factor 960 1 1180 1073 28 the area of this roof 1073 3 sq.

Download the slope chart pdf. The headache of using pythagoras and trigonometry can be spared by making use of these charts.