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A useful window quote identifies each opening, the exact product, the installation work, the exclusions, and the written service terms. Match those details before comparing totals. Use the worksheet below to turn two different proposals into a clearer decision.
Your side-by-side quote worksheet
Put both proposals next to each other and copy this checklist into your notes. For every row, mark each quote specified, excluded, or needs an answer. A blank line is an unanswered question, not a free inclusion.
| Compare this | Record for both quotes |
|---|---|
| Openings | Room labels, quantity, opening styles and who verifies measurements. |
| Products | Manufacturer, series, frame, glass package, finish, screens and hardware. |
| Installation | Method at each opening; what stays and what is removed; sealing and surrounding work. |
| Finishing | Interior trim, exterior finish, painting, protection and disposal. |
| Unknown work | Concealed damage, pricing process and written approval before additional work. |
| Complete price | Quoted total, optional upgrades, separately priced work, taxes and applicable fees. |
| Timing and payment | Product lead time, installation arrangements and payment milestones. |
| Warranty and service | Product and workmanship coverage, exclusions, labor charges and service contact. |
Download the blank two-quote worksheet (.txt) to fill in on your device or print from a text editor. It is a planning aid, not a price estimate.
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Start with a schedule of the openings
A quote for “ten windows” leaves important questions unanswered. Give each opening a simple location label, such as kitchen above sink or front bedroom left. Ask the provider to use those labels in its proposal so you can connect each product and price to the right place.
For every opening, record the proposed quantity, opening style, manufacturer, product line, frame material, glass package, finish, screen, and hardware where applicable. Ask who verifies measurements before ordering. This is a comparison checklist, not a request to measure or order replacement windows yourself.
Spell out the installation and finish work
Ask the installer to explain the proposed method, what existing material remains, and why that approach fits the opening. “Installation included” does not tell you who will restore trim, paint exposed surfaces, remove old materials, or address unexpected damage.
| Ask about | Look for a clear answer |
|---|---|
| Removal | What is taken out and who disposes of it? |
| Surrounding work | Which interior and exterior finishes are included? |
| Protection | How are rooms, furniture, and landscaping protected? |
| Unexpected conditions | How are findings documented and changes priced? |
| Completion | What cleanup and final checks are included? |
Have the contractor identify work left to you or another trade. If painting is excluded, for example, include that separate task in your planning comparison instead of assuming the lowest installation quote is the lowest complete project cost.
Have the proposal name the installation method for each opening, including any described as insert or full-frame replacement. Ask exactly which existing frame and trim components will remain and which will be replaced. If providers recommend different methods, ask each to explain the existing conditions behind the recommendation before treating the prices as comparable. Also clarify responsibility for applicable permits and inspections.
Keep product claims attached to product details
Ask for the exact product specifications behind an efficiency claim. ENERGY STAR recommends including the U-factor and solar heat gain coefficient (SHGC) for each window in the contract. Ask the provider to show how the proposed product suits your climate and to identify the label for that specific configuration. ENERGY STAR window buying guidance.
Our window planning guide explains questions to ask about ratings and climate. Keep that conversation separate from any promise of household savings. Request documentation supporting savings claims; a product rating alone is not a guarantee of your future bills.
Separate product coverage from installation service
Do not compare warranties using only the word "lifetime." Request the actual documents for both the window product and the installation work. Ask the following questions about each proposal and keep the answers with it:
- Who provides coverage? Identify the manufacturer, installer, and company you contact first.
- What is covered, and for how long? Ask separately about the frame, glass, hardware, and workmanship.
- What could you still pay? Clarify labor, diagnosis, travel, shipping, removal, and reinstallation charges.
- What conditions apply? Ask about registration, maintenance, exclusions, and transfer to a future owner.
- How does service work? Get a contact and an explanation of what happens if a product issue also requires installation work.
These are questions to resolve, not a description of a particular provider's warranty. A longer stated term is not enough to establish broader coverage.
Clarify timing, service, and the complete price
Distinguish an estimated delivery date from a scheduled installation date. Ask whom to contact if products arrive incorrectly or a problem appears after installation. Request product and workmanship warranty documents and read the coverage, exclusions, and service process.
- Are required work and optional upgrades separated?
- Are taxes, delivery, disposal, and applicable fees addressed?
- Which costs remain unresolved?
- Does the payment schedule match the written proposal?
- Who handles product issues versus installation issues?
FTC guidance recommends obtaining written estimates and resisting pressure to decide immediately. Give yourself time to resolve differences between proposals. FTC contractor guidance. A useful final question is: “What would still need to be done or paid for when this quoted work is complete?”
Turn different totals into a fair comparison
Illustrative example: Quote A includes the windows and installation but excludes painting and disposal. Quote B includes those finishing tasks, but leaves possible frame repairs unpriced. Neither total alone tells you the complete cost of your intended project.
Ask A for the missing finishing costs and ask B how repairs would be documented, priced, and approved. Keep unknown work marked as unresolved. If the products or installation methods also differ, request a comparable alternative or record why you prefer the different scope.
Start with the quoted total. Add separately priced work you actually need and any fees excluded from that total. Keep optional upgrades separate, and do not assign an invented price to unresolved work.
A per-window average is useful only after you understand differences in opening sizes, products, and installation scope. It should not replace the room-by-room schedule.
A message you can send to each installer
Thanks for the proposal. Before I compare the totals, could you confirm the product and installation method for each opening, the finishing and disposal included, and any exclusions? Please also explain how unexpected work is priced and approved, and send the product and workmanship warranty terms. I would like a revised written proposal showing any changes.
Once the scope is clear, use our Windows project planning page to review your priorities, or take the next step through the chat below. Ask Chatter does not inspect your home or compare live contractor bids; the provider determines the actual quote.
General planning information, not a site inspection or a provider quote. Product instructions and local requirements govern your project.
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