Hiring an Impact Window Installer: Approvals, Quotes and Red Flags
Updated · See the full hurricane impact windows cost comparison
A licensed installer does 10 impact windows for $9,000–$18,000, typically $13,000, permit and inspection included.
- A real quote lists every opening with its size, the product and its approval number, the design pressure, frame and glass spec, the unit and installation price, the permit, and who patches the stucco. A lump sum per house isn't a quote.
- Hire a licensed contractor (in Florida, a certified or registered glazing, building or general contractor) who installs the brand they're quoting. Check the license and that the permit will be pulled in their name.
- The in-home sales presentation with a today-only price is the norm in this industry. Take the quote, get two more on the same spec, and decide with all three.
- Before the last payment: the final inspection passed, the approval labels still on the frames, a hose test, and the wind-mitigation form done by an independent inspector.
What you’re buying
Two quotes for “impact windows for the house” at $11,500 and $16,800 aren’t comparable until you know whether the $11,500 is ten aluminum single-hungs with non-insulated laminated glass, no stucco repair and the permit extra, and the $16,800 is the same openings in low-E insulated glass with color frames, stucco and paint included, the permit pulled and the final inspection scheduled. The cost page explains what each line costs; the table below is the spec to expect.
| Opening | Product | What the quote should specify | Typical installed price |
|---|---|---|---|
| Standard window, 36×48 single-hung | Aluminum impact, laminated glass | Approval number, design pressure, anchors, sealant, stucco patch | $900–$1,800 |
| Same in vinyl or fiberglass, low-E insulated | Premium impact | Same, plus U-factor and SHGC for energy code | $1,400–$2,500 |
| Picture, casement or horizontal roller | Aluminum or vinyl impact | Same; larger units priced individually | $1,200–$3,000 |
| Sliding glass door, 8 ft | Impact slider | Approval, design pressure, track and sill detail, threshold | $2,500–$5,000 |
| Entry door | Impact fiberglass or steel | Approval, frame anchoring, threshold and sweep | $1,500–$4,000 |
| Whole house, 10 windows | Aluminum | One permit, per-opening schedule, patching, disposal | $9,000–$18,000 |
The installer’s checklist
Ask each of these before you sign:
- License — state contractor license number, and certification for the brand quoted.
- Approvals — a product approval number per product, with the design pressure matched to each opening.
- Glass — laminated only, or insulated low-E; the energy-code numbers if required.
- Installation — bucks, anchor schedule per the approval, sealant and flashing method; who patches stucco and paints.
- Permit — pulled in the contractor’s name, with the final inspection scheduled.
- Schedule — lead time, days on site, and what happens if a unit arrives damaged or mis-sized.
- Warranty — manufacturer’s and workmanship, in writing.
- Payment — deposit at order, balance after the final inspection passes.
- Insurance — general liability and workers’ comp, and the wind-mitigation form arranged afterward.
When it’s done
Walk it before final payment. Every sash opens, closes and locks without binding; screens fit; the approval label is still on each frame for the inspector and the mitigation form. Outside, a continuous tooled sealant bead at every frame, stucco patched and painted, no gaps at the sill. Run a hose on each window for a few minutes and check inside. Then: the passed final inspection, the approvals, the permit, the warranties — one folder, kept forever. Book the wind-mitigation inspection the same week.
Estimate a quote before you get one. The hurricane impact windows calculator builds a pro estimate from a low, typical or high base price plus the add-ons above, so you'll know what a fair number looks like.
Frequently asked questions
What should an impact window quote include?
For every opening: the rough size, the window style, the product by manufacturer and series with its Florida Product Approval or Miami-Dade NOA number, the design-pressure rating against what your opening requires, frame material and color, glass make-up (laminated, insulated, low-E, tint); the unit price and the installation price separately; removal and disposal; bucks and anchors; stucco, drywall, trim and paint repair; the permit, plan review and inspections; the schedule and lead time; the warranty on product and workmanship; and the payment terms. Three quotes on that list.
Who installs hurricane impact windows?
Licensed window and door contractors — in Florida, holders of a glazing, building or general contractor license — who are certified dealers for the brands they install, plus the large regional window companies that manufacture and install their own product. A handyman or unlicensed installer can't pull the permit, and the manufacturer's warranty and the insurance credit both depend on a licensed, permitted install. Ask which brands they're certified to install and how many openings they did last year.
How long does it take to get impact windows installed?
Two to four months from signing: 8–16 weeks for the windows to be manufactured to your openings, a week or two for the permit, one to three days on site for a 10-window house, then the final inspection. After a major hurricane, lead times run to 20 weeks or more and prices rise. Order in the off-season and the install lands before the next one.
How do I check the product approval on a quote?
Every impact window sold in Florida has a Florida Product Approval number (FL#####) or a Miami-Dade Notice of Acceptance (NOA) that you can look up on the state's or the county's website; the approval lists the exact series, sizes and design pressures it covers and the installation instructions it must follow. Match the number on the quote to the product, and the design pressure to what your building department requires for your opening. A quote with no approval numbers is a quote to send back.
Should I buy from the big window companies that do in-home presentations?
They install real product with long warranties and price it high, with a sales model built on a two-hour presentation ending in a discount that expires when the rep leaves. The product is often comparable to what a local licensed installer fits for 20–40% less. Take the quote, thank the rep, get two more from local contractors on the same spec, and decide with all three in hand. No legitimate discount vanishes overnight.
What warranty should impact windows have?
The manufacturer's warranty on the unit — typically 10 years to lifetime on frames and seals, 5–10 years on laminated glass against delamination, and shorter on hardware and screens — which applies only when a certified installer fitted it. Plus the installer's workmanship warranty of 1–10 years covering leaks and operation. Get both in writing, with the product approvals, the permit and the final inspection in the same folder.
What are red flags with window companies?
No product approval numbers on the quote; a lump sum with no per-opening breakdown; a today-only price; a large deposit (over 30–50% before manufacturing is normal, but 100% up front isn't); no permit or 'we'll handle it without a permit'; an installer who isn't certified for the brand; no mention of stucco repair; no hose test or final walk; and a design pressure that doesn't match your opening's requirement. Also, pressure to sign in the days after a storm.
Is the wind-mitigation inspection included?
Usually not, and it shouldn't be done by the installer anyway. After the final inspection, hire a licensed home inspector or wind-mitigation inspector ($75–$150) to complete the Uniform Mitigation Verification Inspection form (in Florida) or your state's equivalent, documenting that every opening is impact-rated with the approvals and permit. Send it to your insurer; the discount applies from the next renewal and the form is good for five years.
Sources
- Glaziers (SOC 47-2121), Occupational Employment and Wage Statistics , U.S. Bureau of Labor Statistics, 2026-04
- How Much Do Hurricane Windows Cost? , HomeGuide, 2026-09
- How Much Do Impact Windows Cost? , Angi, 2026-09
- How Much Do Hurricane Windows Cost? , Forbes Home, 2026-09
- Florida Product Approval System , Florida Department of Business and Professional Regulation, 2026-09
- Product Control: Notices of Acceptance , Miami-Dade County, 2026-09
- Uniform Mitigation Verification Inspection Form (OIR-B1-1802) , Florida Office of Insurance Regulation, 2026-09
- Protect Your Windows and Doors , Federal Alliance for Safe Homes, 2026-09
Figures last reviewed . See how we estimate.