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|
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