Why the cheapest quote can cost the most
Two roofing bids can differ by more than $10,000 for the same house — and the cheaper one isn't automatically the better deal. A low number often means something was left out, cut short, or will be billed later as a "surprise."
What actually drives the price
Before you can compare quotes fairly, you need to understand what you're paying for:
- Roof size and pitch — more area and steeper slopes mean more material and labor.
- Material quality — cheaper shingles cost less now and more over the roof's life.
- Tear-off — removing old layers costs more than roofing over them, but it's usually the right call.
- Flashing and ventilation — skipping these creates leaks and shortens roof life.
The hidden cost most bids ignore
Rotten or damaged decking under the shingles often isn't visible until the old roof comes off. A quote that doesn't say how decking replacement is priced is a quote that can balloon on the final invoice.
How to compare fairly
Line the bids up side by side and match them item for item. The best quote is the one that spells out exactly what's included and how unexpected issues will be handled — not just the smallest total.