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.
Roof picth mulitpier.
The roof pitch multiplier is responsible for giving an accurate pitch measurement of the roof.
To see how pitch impacts the look of a garage and changes cost click the design center button on our pole barn kits page.
Determine how many square feet of roof area a building has by measuring from the ground.
Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run.
Then proceed to draw the surface area of the roof that has a different pitch.
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 roof pitch table displays a multiplier for adding for different roof pitches.
This is useful since the area of the roof itself is often difficult to measure by hand.
If you know the angle of the roof in degrees you can find the roof pitch by converting the angle in degrees to a slope then finding the rise by multiplying the slope by 12.
Then multiply the slope by 12 to get the rise.
The maths behind this number is that it is the square root of rise run 2 1.
For example a 4 12 pitch roof that is 100 square feet.
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.
Degrees to pitch rise in run determine the area of the roof s footprint which is the area covered by the roof regardless of slope or the apparent area of the roof when you look straight down at it like from a satellite.
Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.
This makes measuring easier knowing that you are able to get the exact measurement of roofs by merely standing on the ground.
If you know the pitch of a roof you can use the numbers in the following pitch table to do the following.
After drawing the perimeter of the roof add a new drawing layer with the plus symbol found in the bottom right corner.
Roof pitch multiplier roof slope.
The roof pitch multiplier is a number that allows you to find the total surface area of your roof.
100 1 054 105 4ft2.
First find the slope by finding the tangent of the degrees eg.
Use our roof pitch calculator to find the pitch of your roof.
How to find your what roof pitch category.