Roof size calculations the hard way.
How many roof sqaures for 2600sf two story.
100 square feet 1 roofing square 9 290304 cubic meters si unit.
The majority of homes in the us have an asphalt shingle roof.
Many homes have an asphalt shingle roof but some have wood metal tile and slate which can be more expensive.
Using an international foot of exactly 0 3048 meters length.
10 feet by 10 feet 100 square feet.
That said a quote of 26 000 for a 31 squares roof gives us roughly 850 per square which is certainly quite a lot for an asphalt shingle replacement job.
Convert the area to roofing squares.
The first step in a free roofing estimate is measuring the roof dimensions.
This free roofing calculator estimates the area of a roof and the amount of materials required to replace or build said roof.
1 roofing square 9 290304 m 3.
The slope of your roof will factor into how many additional square feet are on your roof.
The typical factor is 25 more roof than house square footage.
Now the roof on a 2500 square foot home is not 2500 square feet.
That includes installation and everything.
Just those two examples give you a range of from 1 3 times footprint square footage to almost 2 times for a one story house.
So before i start breaking things down let me say that in 2018 the average cost for roof replacement for a 2500 square foot home is 8500 to 11500.
Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.
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Take your ground floor square footage and multiply by 125.
Roofing material is estimated by the square which is equal to 100 square feet.
Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure.
I am assuming this roof replacement quote is for a single story home.
The average roof is 3 000 square feet or around 30 squares.
You will need to express this size in terms of square feet.
All else being equal the same roof replacement job on a two story house would be roughly 1 500 more.
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.
Take away overhangs and of course the ratio can go as low as 1 0.
Tearing off 1 layer of asphalt shingles on 2 100 ft 2 one story house will be completed much faster compare to removing three layers of shingles on 3 900 ft 2 3 story house even though actual roof square footage will be identical.