Roof Area Pitch Factor

Get your roof size by using this roof pitch calculator.

Roof area pitch 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. Dividing by 12 gives the ratio of inches in rise per distance. The overhanging portions on the roof are duly added into the figure. For example a standard roof pitch is.

Valley hip factor. Both metric and imperial measurement systems are displayed in a popup menu over the results area. The surface area of the roof is found by multiplying the number found in step 3 by the number found in step 1. The maths behind this number is that it is the square root of rise run 2 1.

Now you re ready to price out the materials. In other words the surface area is impacted by the slope of the roof. Roof is 6 12 pitch and measures at 2 400 square feet so 2400 x 1 12 2 688 2 88 sqs added for pitch. Download the slope chart pdf.

Slope of the roof. A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof. The roof pitch can also be determined by staying on the ground. How roof pitch is calculated to accurately calculate the area of your roof you must first determine its slope or pitch.

Surface area of roof area covered by roof roof pitch factor 800 1 12 896 square feet. 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. A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by the area covered by a sloped roof to produce the area of the actual surface of the roof. This is done by measuring the width of the roof on the gable side and the exterior wall sections from corner to corner.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. 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. Enter your numbers into this go to roof pitch calculator.