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Roof Pitch, how much to add

 

This roof pitch table displays a multiplier for adding for different roof pitches
How to find your roof pitch

If you know the pitch of a roof, you can use the numbers in the following pitch table to do the following:
Determine how many square feet of roof area a building has by measuring from the ground.
Determine how many square feet of roof area a building has by measuring blueprints or plans.
This Roof Pitch Chart will give you your multiplier
Or just enter your numbers into this Roof Pitch Calculator

Roof Pitch Roof Pitch Multiplier
2/12 1.01
3/12 1.03
4/12 1.05
5/12 1.08
6/12 1.12
7/12 1.16
8/12 1.20
9/12 1.25
10/12 1.30
12/12 1.41
14/12 1.54
16/12 1.67
18/12 1.80
20/12 1.94
22/12 2.09
24/12 2.24

Example:
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.
Get your roof size by using this Roof Pitch Calculator


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This page last updated 10-17-2014