Week 0: quote and final measure
The sales visit is not the measurement that matters. A separate technical measure, usually done after you sign, produces the numbers the factory builds to, and it's where problems like out-of-square openings and rotted sills get caught.
If a company wants to order units off the sales-visit numbers, that's a red flag. Refit and reorder delays start here.
- Sales quote visit: 60–90 minutes
- Technical final measure: 1–2 hours, typically 3–10 days after signing
- Color, grille, and hardware selections locked at this point
Weeks 2–8: manufacturing lead time
Standard vinyl units run 2–5 weeks. Fiberglass, wood-clad, custom colors, specialty shapes, and bay or bow assemblies commonly run 6–12 weeks. This is the part of the schedule nobody can compress.
Ask for the lead time in writing and ask what happens if a unit arrives damaged, because a single damaged sash can add its own 3–6 week cycle for that opening.
- Stock-size vinyl: 2–5 weeks
- Custom color or grille pattern: 5–8 weeks
- Fiberglass or wood-clad: 6–10 weeks
- Bay, bow, or specialty shape: 8–12 weeks
| Product | Typical lead time |
|---|---|
| Stock-size vinyl | 2–5 weeks |
| Custom color or grille | 5–8 weeks |
| Fiberglass or wood-clad | 6–10 weeks |
| Bay, bow, or specialty shape | 8–12 weeks |
Install day: how many openings per day
A two-person crew does roughly 6–10 standard insert replacements a day. Whole-home jobs of 12–20 openings are typically 2–3 days. Full-frame replacement with exterior trim and capping runs closer to 3–5 openings per crew per day.
Each opening is open to the weather for 20–45 minutes, so crews work room by room rather than pulling every window at once.
- Insert replacement: 45–90 minutes per opening
- Full-frame replacement: 2–4 hours per opening
- Bay or bow: often a full day for the single assembly
- Exterior capping and caulking: same day, weather permitting
What pushes the schedule
- Rotted sills or framing found at tear-out (add a half day and a change order per opening)
- Lead-safe RRP work practices on pre-1978 homes (adds setup and cleanup time)
- Rain or sustained sub-freezing temperatures (caulk and foam cure poorly below 40°F)
- A single mismeasured or factory-damaged unit (3–6 weeks for the replacement)
- Permit review where a rough opening is being enlarged for egress
Ready to turn this into a plan for your window project? I'll walk you through a short guided conversation and hand back a personalized project profile you can use to compare quotes fairly.
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Frequently asked questions
How long does whole-home window replacement take?+
Installation is typically 2–3 days for 12–20 standard openings. The whole project from signed contract to final caulk usually runs 4–10 weeks, almost all of it manufacturing lead time.
Do I need to leave the house during installation?+
No. Crews work one room at a time and each opening is only open for under an hour. Clear furniture and window treatments about three feet back and plan for noise.
Can windows be replaced in winter?+
Yes, and crews do it routinely. Below roughly 40°F, low-temperature caulk and foam are required, and sustained deep cold or wind can push a day. Expect a room to be chilly for the hour it's open.
Why is one window taking weeks longer than the rest?+
Almost always a mismeasure or shipping damage on that unit. It goes back into the factory queue on its own cycle. Hold final payment until every opening is complete.
Keep planning your window project
Window Replacement Timeline by state
- Planning a bathroom remodel?Waterproof floors are one piece — price the whole bathroom. — BathGuide
- Picking flooring for a wet room?Waterproof options that hold up to bathroom moisture. — FloorGuide
- Doors and thresholds on the list too?Entry, patio, and interior doors with real install costs. — DoorGuide
Ready to see your remodel profile? WindowGuide is a 2-minute guided conversation, not a contractor form, you'll see your personalized plan before sharing anything. Matching with a local provider is optional.
See your personalized remodel plan in 2 minutes
Tell me a bit about you and I'll tailor the plan to your home and budget. No pressure, no obligation.