Roof Pitch Area Multiplier

Roof pitches in degrees.

Roof pitch area multiplier.

This nominal square footage amount is then multiplied by a factor associated with the roof s pitch. Your roof is without a doubt one of the most important elements of your home. 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. Given pitch and a horizontal area measurement multiply the horizontal area by a correction factor corresponding to pitch provided in the table below to determine the actual area of the roof to be used in the roofing material calculator.

Measuring roof area. For multi pitched roofs simply add the areas of all common pitches together by toggling layer visibility from the summed layer identified by the eye symbol at the left of the layers control. Typically the steeper the roof is the higher the price will be. The maths behind this number is that it is the square root of rise run 2 1.

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. This roof pitch table displays a multiplier for adding for. Roof pitch how much to add. As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house.

The value arrived at 928 reflects the square feet of the roof. Make sure that this is going to be affordable for you as more materials and time are needed to construct steeper roofs. How to measure a roof with google earth. Depending whether the roof area is measured horizontally possibly from a drawing or photograph a correction factor is necessary to determine the actual area of the roof.

Now you re ready to price out the materials.