Build a per-opening comparison sheet
List every line item down the side: opening count, insert vs. full-frame, frame material, product line, U-factor, SHGC, grids, interior trim, exterior capping or wrap, disposal, permit, and labor warranty. Put each company in a column. If a company did not quote a line item, write "not included."
The most common reason for a large price gap is scope, not margin. An insert quote against two full-frame quotes will always look like the best deal until you read the line items.
Red flags worth walking away from
These come up often enough to name.
- A single lump-sum price with no per-opening breakdown
- Discounts that expire at the end of the appointment
- No NFRC ratings listed for the quoted product
- No written answer on what happens if rot is found
- Large deposits requested before product is ordered
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Frequently asked questions
How many quotes should I get?+
Three is the standard answer. Two is fine if both companies scope identically and you have a strong reference for one of them.
Why is one quote half the price of the others?+
Almost always scope: an insert instead of full-frame, a lower product tier, or exclusions on trim, capping, and disposal. Line the quotes up side by side before you decide anyone is overpriced.
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