Take the roof area in square feet, multiply by a rate for the system you want, and add tear-off and trim. At 12 dollars per square foot, a 2,000 square foot roof is 24,000 dollars for the field. Roof area is not house footprint, which is where most estimates go wrong.
Get Metal Roof Cost Guide connects you with licensed local companies. We are not a roofing contractor and do not perform the work ourselves.
Three steps, and the pitch factor is the one people skip.
| Step | How |
|---|---|
| Roof area | Footprint times pitch factor, plus overhangs |
| Pitch factor | About 1.05 at 4:12, 1.12 at 6:12, 1.20 at 8:12, 1.41 at 12:12 |
| Waste | Add roughly ten percent |
| Rate | 4 to 9 exposed fastener, 10 to 18 standing seam, per sq ft |
See what the components are called for what the rate does and does not include.
Four things, and they are the four that move real quotes.
Use the number to sanity check quotes, not to negotiate with. how installed prices are built up explains the work a real quote is pricing.
For roof area, reasonably. For price, only as a rough band. They cannot see deck condition, complexity or access, which is where quotes actually diverge.
Measure the ground footprint, multiply by the pitch factor for your roof, and add for overhangs. Satellite measurement tools do the same thing.
There is no harm in it, but expect them to measure. Treat your number as a check on the quote rather than a target for it.
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