You get the estimate from your insurance company. You get a bid from a roofing contractor. The numbers are thousands of dollars apart, and your first thought is that somebody is trying to take you for a ride.
Usually nobody is. The two documents are answering different questions.
The estimate answers "what do we owe?"
An adjuster walks your roof, notes the damage, and writes it up in estimating software using your carrier's price list. That price list is regional and updated periodically. The adjuster is working from what they observed in the time they had on site, and they're pricing the repair against a standard set of line items.
What they produce is a good-faith opening number. It is not a construction plan.
The bid answers "what will it cost to build this?"
Your contractor is pricing an actual job on an actual house. That includes things the estimate frequently doesn't capture — because the adjuster couldn't see them from the ladder, because they aren't standard line items, or because they only become visible once the old roof comes off.
Common examples:
- Decking replacement. Nobody knows what the plywood underneath looks like until the shingles are off.
- Code-required upgrades. Ice and water shield requirements vary by city. If your municipality requires two layers at the eaves and the estimate has none, that's a real cost that isn't optional.
- Detach and reset. Solar panels, satellite dishes, gutters — these have to come off and go back on, and that labor is often missing entirely.
- Steep or multi-story access. A 12/12 pitch is a different job than a 4/12, and pricing should reflect that.
The gap is a conversation, not a verdict
Here's what most homeowners don't know: the first estimate is not the final estimate. Carriers revise. There's an established process for documenting what was missed and submitting it for review — that's what a supplement is.
The work is in the documentation. Photographs of the actual conditions, the code citation for your specific city, the measurement that contradicts the one on file. Submitted properly, most of these get approved, because the adjuster isn't fighting you — they're waiting for evidence they didn't have when they wrote the first number.
What to do with the two numbers in front of you
Don't assume the low one is correct and don't assume the high one is padded. Ask your contractor to walk you through the specific line items that differ, and ask whether they handle supplementing or whether that falls on you.
If the answer is that it falls on you, that's worth knowing before you sign anything.
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