Roof square footage is not the same as the house square footage unless your roof is flat.
Roof square footage vs home square footage.
So continuing our example if you ve got a two story house with a total square footage of 2 700 square feet with each floor having.
Multiply by the square footage of a single floor of your house.
Take that to a 12 12 pitch and the actual roof square footage goes up to assuming peaked along the 100 dimension 3896 sf.
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The typical factor is 25 more roof than house square footage.
A discrepancy in the square footage can indicate that an addition was made without the appropriate permits being pulled.
Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.
Change the 2000sf dimensions to 45x44 4 feet with ridge along the 45 dimension you get 51x50 4 roof plan footage 2570 sf flat or 3635 at 12 12 slope.
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Take your ground floor square footage and multiply by 125.
The total amount of roofing material you need is 17 300 1 730 19 030 square feet.
The total foot print the home will take up.
Total square feet is just that.
Same with the garage or basement space that is not finished.
Roof size calculations the hard way.
Depending on where the information is coming from is going to determine the basis on which the estimated roof footage is calculated.
The roof square footage is what we roofing contractor need to calculate a budget quote to do the job.
Even some spaces over a garage are not considered living area.
It depends on the home designer and the specific home plan.
Convert the area to roofing squares.
This area includes garages porches patios and any area under the main roof.
In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area.
Roofing quote footage is not the same as home square footage.
The slope of your roof will factor into how many additional square feet are on your roof.
Multiply the square footage of your roof by 1 to get the 10 percent waste allowance.