Getting Window Installation Quotes: What to Ask and Compare

Window quotes can vary dramatically. According to FGIA, understanding what should be included helps you compare apples to apples and avoid surprises.

What a Complete Quote Should Include

According to FGIA and industry best practice:

Window Specifications

• Manufacturer and product line
• Frame material
• Glass package (panes, Low-E, gas fill)
• U-factor and SHGC ratings
• Window style and operation type
• Color/finish

Installation Scope

• Number and locations of windows
• Removal of old windows
• Disposal of old windows
• Installation method (pocket vs. full-frame)
• Trim work (interior and exterior)
• Flashing and weatherproofing

Costs Breakdown

• Windows cost (itemized preferred)
• Installation labor
• Materials (trim, caulk, flashing)
• Any additional work (rot repair, etc.)
• Permit fees (if included)
• Sales tax

Timeline

• Expected start date
• Project duration
• Any scheduling dependencies

Warranty Information

• Manufacturer warranty coverage
• Installer's workmanship warranty
• What's covered vs. excluded

Questions to Ask

According to Better Business Bureau guidance:

About the Windows

1. Why do you recommend this product?
2. What's the energy rating (U-factor)?
3. What warranty comes with the windows?
4. Is this tax credit eligible?

About Installation

5. Who does the actual installation (employees or subcontractors)?
6. What installation method will you use?
7. How do you handle unexpected issues (rot, structural problems)?
8. Will you pull required permits?

About the Company

9. How long have you been in business?
10. Are you InsallationMasters certified?
11. Are you EPA Lead-Safe certified (for pre-1978 homes)?
12. Can you provide references?

About the Quote

13. Is this quote fixed or an estimate?
14. What could cause the price to change?
15. What's your payment schedule?
16. How long is this quote valid?

Comparing Quotes

According to FGIA, make true comparisons:

Ensure Same Specifications

• Same or equivalent window brand/model
• Same glass package
• Same installation scope

Watch for Hidden Costs

• Disposal fees not included
• Permit fees separate
• Interior trim extra
• "Typical additional work" clauses

Consider Total Value

| Factor | Weight in Decision |
|--------|-------------------|
| Price | Important but not sole factor |
| Window quality | High |
| Installer reputation | High |
| Warranty coverage | Moderate-high |
| Timeline fit | Moderate |

Red Flags in Quotes

According to BBB warnings:

• Pressure to sign immediately
• Huge discounts off "regular price"
• Cash-only requests
• No written quote
• Vague specifications
• Unusually low prices (may indicate shortcuts)

The Bottom Line

Get multiple quotes (3-4 recommended), ensure you're comparing equivalent products and services, and evaluate the total value—not just the price. According to FGIA, the lowest quote isn't always the best value.

*For complete hiring guidance, see: [Choosing a Window Installer](/guides/choosing-window-installer)*