How to Compare Roofing Estimates Content
Match the scope before you compare the price, or you are comparing different jobs. The sections below cover how, line by line.
Match the Scope Before the Price
The most common mistake is comparing two quotes that aren't for the same work.
On a tile roof, one contractor may be quoting a targeted repair, another a lift-and-relay, and a third a full replacement. Those are three different jobs. The cheapest isn't a better deal, it's less work.
Read what each proposal actually covers first. If they don't match, ask each contractor to price the same scope so you have something comparable.
What Should Be in Writing
- Tear-off and disposal, or explicitly not
- Deck inspection, and what happens if damage is found
- Underlayment or membrane, named by product
- Flashings, penetrations, and edge details
- Ventilation or drainage work
- The finished roofing product, by name
- Property protection and cleanup
- Warranty terms, workmanship and manufacturer
- Schedule and payment terms
- Exclusions
The Decking Question
Ask every contractor how damaged decking is handled and at what rate. It's the most common change order on a replacement, and a proposal silent on it isn't cheaper, it's incomplete.
A quote that assumes zero deck damage on a thirty-year-old roof is a quote that will change.
Read the Exclusions
This section tells you more than the inclusions do. A low price with a long exclusions list is a different product from a higher price with a complete scope.
Warranty Terms
Compare what the workmanship warranty covers and for how long, and whether the manufacturer warranty requires registration or a certified installer. A long warranty from a contractor who's been operating six months is worth what you'd expect. See warranties.
Verify the License
Check the ROC number is current and the classification covers the work. It takes a couple of minutes on the Registrar of Contractors site.
Get Everything in Writing
Verbal assurances during a sales visit are worth nothing at closeout. If a contractor promises something matters to you, whether it's a timeline, a material, or how debris is handled, ask for it in the written scope. A contractor who won't put it in writing has told you something.
Payment Terms
Large deposits before materials are ordered are worth questioning. Progress payments tied to milestones are normal. Full payment before work starts is not.
Frequently Asked Questions:
Why do roofing quotes vary so much?
Most often because they're for different scopes rather than different prices for identical work. Material specification, whether tear-off is included, how decking is handled, and warranty terms all move the number substantially. Comparing what each proposal covers before comparing totals usually explains most of the gap.
How many estimates should I get?
Two or three is generally enough to see whether recommendations converge and where pricing sits. More than that tends to add confusion rather than clarity. What matters more than the count is that each contractor inspected the roof and provided a written scope you can compare.
Is the lowest estimate ever the right choice?
It can be, when the scope genuinely matches and the contractor is properly licensed, insured, and reputable. It's a problem when the low number reflects a thinner scope, excluded items, or work that will generate change orders later. Compare the scopes and the exclusions, then the price.
What should I be suspicious of in an estimate?
A quote given without inspecting the roof, pressure to sign immediately, a large deposit before materials are ordered, no written scope, and vague material descriptions rather than named products. Also be cautious about any proposal that doesn't address what happens if damaged decking is found.
See what we can document, or send us the letter. Or call (480) 565-7663.
