A roof with a 6 rise for every 12 run has a 6.
Slope roof into sq ft.
The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed.
And for a roof with a slope of 6 12 that number 1 118 is your roof slope multiplier.
Flat roofs if your roof is flat or has no more than a 3 in 12 pitch you can calculate its total square footage by simply multiplying the length by the width.
As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house.
Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.
That gives you 5 590 square feet which is the actual area of the surface of the roof.
Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118.
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 1 350 square feet multiply 1 350 by 1 0541 to get 1 423 square.
And that s the number you were looking for.
Get your roof size by using this roof pitch calculator.
Multiply the roof length by the gable wall length 40 24 960 multiply this amount by the slope factor 960 1 1180 1073 28 the area of this roof 1073 3 sq.
So 2400 x 1 12 2 688 2 88 sqs added for pitch.