Window replacement is one of the most disruptive home improvement projects homeowners worry about — but usually far less disruptive than expected. Understanding the timeline from start to finish helps you plan and know what to expect.
Here’s a complete answer: how long the process takes, what happens at each stage, and what you can do to make it as smooth as possible.
Most window replacement projects are completed in a single day. A typical whole-house replacement of 10–15 windows takes one full day with a professional crew of 4–5 installers. Larger projects — 20+ windows, complex configurations, or historic home applications — may take two days. The windows themselves are measured, ordered, and typically delivered within 4–8 weeks of your free estimate.
Your installer visits your home, measures every window opening, discusses your series and style preferences, and provides a written estimate with a specific price. This appointment typically takes 1–2 hours depending on the number of windows. There is no pressure and no obligation. This is also the step where your installer will flag any non-standard openings, historic configurations, or accessibility challenges that might affect installation day.
Once you confirm your order, your Andersen windows are manufactured to the confirmed measurements. Andersen windows are made to order — not pulled from generic inventory — which is why there is a production lead time. Typical lead time is 4–8 weeks depending on the series and configuration. Your installer will give you a specific timeline at the time of order.
During this period you don’t need to do anything. Your existing windows stay in place. Your home is fully functional.
Your installation crew arrives in the morning — typically between 7:30 and 9:00 AM depending on the contractor. A professional crew of 4–5 certified installers works through your home systematically. Here’s what happens:
Most homeowners are surprised at how quickly a professional crew works. A crew of 4–5 installers can typically replace 10–15 standard windows in a single 8-hour day.
For planning purposes:
Your installer will give you a specific per-day estimate based on your actual window count and configuration during your free consultation. Learn more about what windows typically cost.
Window replacement day is largely handled by your installation crew — but a few simple preparations make the day smoother:
On a two-day project, your windows are properly installed and functional at the end of each day. The job is never left in a state where your home is unsecured overnight. If unexpected complications arise that would require leaving an opening exposed, your installer will discuss options with you in real time.
After installation:
Andersen windows require essentially no break-in period. Your new windows are fully operational and properly sealed from the moment installation is complete.
Our free in-home estimates are available 7 days a week throughout NJ, PA, and Delaware. We measure every opening, give you a specific installation timeline, and provide a guaranteed best price with our Price Match Guarantee.
No pressure. No obligation. Just an honest assessment of your windows and doors, a complete product walkthrough, and a guaranteed best price. Our free in-home consultations are available 7 days a week.
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