Roof Area Pitch Factor

The roof pitch can also be determined by staying on the ground.

Roof area pitch factor.

The surface area of the roof is found by multiplying the number found in step 3 by the number found in step 1. Enter your numbers into this go to roof pitch calculator. Surface area of roof area covered by roof roof pitch factor 800 1 12 896 square feet. Valley hip factor.

Get your roof size by using this roof pitch calculator. 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. For example a standard roof pitch is. Dividing by 12 gives the ratio of inches in rise per distance.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. The maths behind this number is that it is the square root of rise run 2 1. This is done by measuring the width of the roof on the gable side and the exterior wall sections from corner to corner. In other words the surface area is impacted by the slope of the roof.

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. Both metric and imperial measurement systems are displayed in a popup menu over the results area. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. How roof pitch is calculated to accurately calculate the area of your roof you must first determine its slope or pitch.

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. 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. 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. If the area is 10 000 squares then roof pitch would be 12 500 10 000x1 25.

Now you re ready to price out the materials. 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. The overhanging portions on the roof are duly added into the figure.