What should a roofing estimate actually include?
You'll hear 'estimate,' 'bid,' and 'proposal' used interchangeably, and they all mean roughly the same thing: a formal written document laying out the full scope, materials, and cost of the job. A thorough one covers far more than a single dollar amount. Here's what should be spelled out:
- Materials by brand, product line, style, color, and quantity. 'CertainTeed Landmark in Heather Blend, 28 squares' is specific enough to hold someone to. 'Asphalt shingles' is a placeholder, and a red flag.
- Labor as a per-square rate or task-by-task breakdown. Labor is one of the biggest slices of the total, so it deserves its own clear line.
- Tear-off and disposal as a separate line, not buried in a lump sum.
- Permit fees. Requirements vary by city around the Portland metro, so confirm the permit is included and who pulls it.
- A waste factor. Good contractors build in a materials buffer, usually 10 to 15 percent, to cover cuts, starter strips, and ridge pieces. If it's not mentioned, ask.
- Both warranties, named and dated: the manufacturer warranty on the shingles and the workmanship warranty on the installation.
- A payment schedule tied to milestones, with a reasonable deposit, not everything upfront.
- Separate entries for flashing replacement, ventilation work, decking repair, and final cleanup.
How does the estimate visit work when it's done right?
A proper estimate visit follows a sequence, and knowing it helps you spot a contractor who's cutting corners before any work starts. It begins with an exterior walkaround: gutters, fascia, soffits, and anything visible from the ground. Then the contractor gets on the roof to check shingle condition, flashing, pipe boots, ridge caps, and any soft spots in the decking.
Then comes the step that gets skipped most often: the attic. Skipping the attic means nobody assessed your ventilation, moisture levels, or decking from below, and poor ventilation is one of the leading causes of early shingle failure. It can also void your manufacturer warranty. If a contractor skips the attic, ask why. There isn't a good answer.
After measuring the roof and accounting for complexity like valleys, dormers, and skylights, a good contractor walks you through what they found before leaving. That conversation tells you a lot about how they communicate and whether they're being straight with you. All in, a thorough visit takes 30 to 60 minutes. If someone glances at your roof for ten minutes and emails you a number, that number is a guess wearing a suit. A real roof inspection is the foundation of a real estimate.
Why do estimates vary so much between contractors?
Two contractors can look at the same roof and hand you bids that are thousands apart. That gap usually isn't about profit margins. It's about scope. One bid includes full flashing replacement while another assumes the old flashing is reusable. One quotes an architectural shingle with a strong warranty while another quotes a builder-grade product. Those are not the same job, so they shouldn't be the same price.
The usual suspects behind differing bids: scope differences like pipe boots and drip edge included or ignored, material grade, crew experience and proper licensing (which carry overhead, and should), whether permits are included, and whether a waste factor was accounted for at all. A contractor who skips the waste factor may run short on materials mid-job, which is exactly as fun as it sounds.
A full replacement is a five-figure project for most homes, so a bid that comes in dramatically below the others usually signals missing scope, not a bargain. Understanding the estimate is also the first step in the bigger replacement decision, which our roof replacement guide walks through end to end.
How to use estimates to pick the right contractor
Getting multiple estimates is the single most useful thing you can do before hiring a roofer. Three to four written quotes give you enough data to spot outliers in both directions and to see what a fair price looks like for your specific roof.
Then compare them properly: line up the scope side by side, not just the totals. A bid that's a few thousand lower but excludes tear-off and flashing isn't actually cheaper. Ask about anything unclear. If a line says 'miscellaneous materials,' find out what that covers, because a contractor who can't explain their own estimate is telling you something.
Check the license and insurance. In Oregon, roofers must carry a valid CCB license, and you can verify the number online. French Roofing carries CCB #203933 and is insured and bonded. Look at warranty terms too: a one-year workmanship warranty is the bare minimum, five or more is better, and certified contractors can offer manufacturer warranty tiers that standard contractors can't.
Finally, look at the payment schedule and the visit itself. A normal deposit is a modest share of the total, tied to milestones. A contractor asking for half or more upfront is outside normal practice. And a contractor who spent fifteen minutes on site and skipped the attic didn't gather enough information to bid accurately, which leaves room for 'surprises' later. If you want a reference point before anyone visits, our instant estimate tool gives you a ballpark in a couple of minutes.
What I've learned after years of giving estimates
The biggest misconception I run into is that an estimate is just a price. Homeowners get three numbers and pick the lowest. I get it, roofing is expensive and nobody wants to overpay. But a number without a detailed scope behind it is almost meaningless.
I've walked onto jobs where the previous contractor gave a rock-bottom bid, started the work, then hit the homeowner with change orders for decking, flashing, and disposal that were never in the original quote. Those surprises weren't surprises to the contractor. They just weren't disclosed.
The attic inspection is the step I see skipped most, even by experienced crews. I understand the time pressure, but ventilation problems are invisible from outside and they will shorten the life of any roof we put on. We do the attic walk every time, because it's the only way to give an honest number. My advice: if someone hands you a single figure with no line items, ask for the breakdown. If they can't produce one, you've learned everything you need to know about how they'll communicate once the job starts.