This nominal square footage amount is then multiplied by a factor associated with the roof s pitch.
Roof for a 1800 square footage house.
The average roof is 3 000 square feet or around 30 squares.
Estimate per square foot.
It is often compared to slope but is not exactly the same.
Roofs with less slope need less shingles and roofs with more slope need more shingles.
4 7.
Basic removal of existing roofing material underlayment flashing and trims to prepare a fresh base for new material.
When a roof needs to be replaced one of the first steps you may perform is figuring out the roof area.
A new asphalt shingles roof for a typical 2 000 sq.
In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.
Roof pitches in.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Outside of the u s a degree angle is typically used.
You can also get a rough estimate by looking at the square footage of your house.
1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.
The estimates above for how many square feet of roofing average single story and two story homes have are based on a roof with a 6 12 slope.
Roofing cost per square foot.
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.
When calculating roofing costs per square asphalt shingles run from 350 and 500 per square metal or tin roofs costs 600 to 1 200 per square and concrete or clay costs between 1 200 and 1 800 per square.
Slope of the roof.
To install depending on the type of shingle and project specifics variables.
Across the us a typical architectural asphalt shingle roof will cost between 4 00 and 7 00 per sq.
Select how steep the roof is.
This chart is a general guideline that covers tiny houses to average size homes.
How do you calculate square footage for a roof.
Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material.
If you are replacing your current roof add 125 to 500 per roofing square for old roof removal.
Measure your house at ground level then add in the roof s overhang for greater accuracy.
A 4 12 pitch is relatively easy to walk an 8 12 is very difficult to walk and a 12 12 is impossible to walk.
Enter the approximate value for how many square feet the house has in the first number box.