How to compare replacement-window quotes
Window prices are not comparable until each opening and performance package is identified. “Premium vinyl window” does not supply that information.
What the official record says
ENERGY STAR tells buyers to ask that each window’s exact U-factor and solar heat gain coefficient appear in the contract. It also says qualifying windows carry ENERGY STAR and NFRC labels and advises saving the labels as installation records. Its consumer page recommends quotes from several installers and a labor-and-material breakdown. ENERGY STAR further notes that replacement in pre-1978 homes calls for lead-paint protocols, a subject the installer should address before removal.
What to check on the document
Map each quoted unit to a specific opening. Check whether the proposal describes insert replacement, full-frame replacement, exterior capping, interior trim, and disposal.
- List manufacturer, series, operation, dimensions, color, grid, glass package, U-factor, and SHGC for every opening.
- Identify installation method, flashing or water-management work, trim, caulk, painting, and debris removal.
- Separate product warranty, glass warranty, labor warranty, permit responsibility, and lead-safe procedures.
How to use the result
Ask each installer to price the same opening schedule and to attach the product performance documentation. Verify labels at delivery before old windows are removed, as ENERGY STAR recommends. The decode can show scope differences and benchmark public product information. It cannot inspect the openings or confirm that a chosen installation method fits the wall assembly.
A useful comparison holds scope constant. Equipment model, quantity, removal, disposal, permits, labor, finish work, warranty, and payment schedule can move the total even when two proposals describe the same trade. We read the document and name missing comparison fields. We do not inspect the property, size equipment, or decide whether a contractor is honest.
Operated by Reality Contact, LLC. A benchmark, not a verdict. Not legal advice. Not engineering or contracting advice. You ask the questions and you sign or do not sign; we do not contact contractors for you.