For estimating purposes we also assume that there is a chimney a couple of dormers and two layers of old shingles that need to be torn off and removed before a new roof can be installed.
Roofing estimates in my area.
To accurately calculate the area of your roof you must first determine its slope or pitch.
Many homes have an asphalt shingle roof but some have wood metal tile and slate which can be more expensive.
Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.
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Roofing material is estimated by the square which is equal to 100 square feet.
See costs in your area start here enter your zip code the average roof replacement cost is 4 200 6 600 on a 1 600 sq ft.
However if you use premium materials such as metal wood shingles clay tile etc the cost of your roof will be at least 9 500 16 000.
Assuming this is a hip roof we multiply this by 1 1 which gives us roughly 18 squares or 1 800 square feet of the roof surface.
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Ranch house using asphalt roof shingles.
As such while it can be cumbersome measuring the area and pitch of each part of the roof and multiplying by the corresponding correction factor will result in the most accurate estimate of necessary.
While it is possible to estimate the amount of necessary materials using only the total roof area measurement as can be seen from the table depending how large the pitch of the roof the actual area of the roof can differ by up to 2 236 from the measured total area at a pitch of 24 12.