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How much to add for roof pitch

 

This table displays how much to add for different roof pitches

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.

Roof Pitch Amount to Add
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.


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This page last updated 02-28-2014