Retrofit Windows — Upgrade Without the Full Tearout
Retrofit installation places a new, high-performance window inside your existing frame — delivering energy efficiency and fresh aesthetics with less disruption and lower cost.
What Are Retrofit Windows?
Retrofit window replacement — also called insert replacement — is the most common method of residential window replacement. Instead of removing the entire window assembly down to the rough opening, a retrofit installation places a new window unit inside the existing frame. This approach works best when the existing frame is structurally sound, properly aligned, and free of rot or water damage. The result is a brand-new window with all the energy efficiency, operational ease, and aesthetic appeal of a full replacement, but with less disruption to your home's interior and exterior finishes.
At Revival Windows, approximately 70% of our residential replacements use the retrofit method. It's faster, cleaner, and more affordable — making it the preferred choice for most homeowners upgrading older windows.
Why Retrofit Windows Matter for Your Home
Full-frame window replacement requires removing interior and exterior trim, cutting out the old frame, and often repairing or refinishing the surrounding wall surfaces. This adds time, cost, and disruption to the project. Retrofit installation avoids all of this by working within the existing frame opening.
The trade-off is a very slight reduction in glass area (typically less than 1 inch on each side) as the new window sits inside the old frame. For most homeowners, this minor difference is invisible and the benefits of retrofit — lower cost, faster installation, and no damage to surrounding finishes — far outweigh the alternative.
How We Install Retrofit Windows
Assessment of existing frames to confirm they're suitable for retrofit installation — checking for rot, alignment, and structural integrity
Precision measurement of the interior frame dimensions for custom window fabrication
Custom manufacturing of your new windows to fit precisely within the existing frames
Removal of the old sash and hardware while preserving the existing frame and trim
Installation of the new window unit with proper shimming, insulation, and sealing
Interior and exterior finishing, hardware adjustment, and lifetime warranty registration
Key Benefits of Retrofit Windows
Lower Cost
Retrofit installation typically costs 20-30% less than full-frame replacement by preserving the existing frame and trim.
Faster Installation
Most retrofit replacements take 30-60 minutes per window — a full home can often be completed in a single day.
Less Disruption
No interior or exterior trim removal means less mess, less noise, and no need to repaint or refinish surrounding surfaces.
Preserved Aesthetics
Your existing trim, sills, and surrounding finishes remain untouched — maintaining your home's original character.
Full Performance
Retrofit windows deliver the same energy efficiency, noise reduction, and operational ease as full-frame replacements.
Lifetime Warranty
Our retrofit installations receive the same comprehensive lifetime warranty as every window we install.
Technical Details & Specifications
Retrofit windows are manufactured with an integral mounting flange that sits against the interior face of the existing frame. The gap between the new window and the old frame is sealed with low-expansion foam insulation and finished with interior trim stops. Exterior sealing is accomplished with high-quality silicone or polyurethane caulk applied to the junction between the new window and the existing frame.
The resulting assembly provides an airtight, watertight seal that performs comparably to a full-frame installation. Our retrofit windows are available in all standard types — double-hung, casement, sliding, picture, and specialty shapes — with the same glass packages and frame options as our full-frame products.
What to Expect for Retrofit Windows
Retrofit installation typically costs 20-30% less than full-frame replacement for the same window specifications, making it the most cost-effective upgrade path for homes with sound existing frames. Full-home retrofit projects benefit from volume pricing that further reduces per-window costs. We provide detailed, itemized quotes during a free consultation so you know exactly what to expect.
Every project is unique — that's why we quote on-site, not online. During your free in-home consultation, our window expert will assess your current windows, take precise measurements, and present tailored options with no pressure.
Schedule Your Free EstimateSigns You Need Retrofit Windows
If you notice any of these warning signs, it may be time to consider upgrading. Don't wait until small problems become expensive repairs.
Your existing window frames are in good condition — no rot, warping, or structural damage
You want to upgrade your windows with minimal disruption to your home
Budget is a consideration and you want to maximize value
Your home has custom trim or finishes that you don't want to disturb
You're looking for a fast installation timeline — often completed in one day
Frequently Asked Questions
About Retrofit Windows
If your existing frames are structurally sound, properly aligned, and free of rot or water damage, retrofit is likely the right choice. Our team assesses every frame during the consultation and will recommend full-frame replacement only when necessary.
There is a very slight reduction in glass area — typically less than 1 inch on each side — as the new window sits inside the existing frame. For most homeowners, this difference is imperceptible.
Yes. The window itself is identical in both methods. The only difference is the mounting approach. Properly installed retrofit windows achieve the same energy performance ratings as full-frame installations.
Where We Install Retrofit Windows
Revival Windows provides professional retrofit windows installation across five major markets. Find your local office below.
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449+ Five-Star Reviews
Theresa Fernandez
"My entire house Revival Window install went awesome thanks to the great crew of Adrian,Align & Aden. I have been sitting here in awe of how great they look and feel. Also thanks to Hayden, Rick & Christi. Great Revival Window Team!"
Laurie Roos
"I was so pleased to have Revival windows installed in my home. Great customer service. Had no issues with installation. The crew was well trained, organized, friendly and took great care in working in and around my home. These are well manufactured windows, I’m loving them and can’t wait for the energy savings!"
Ms. Nichole
"My husband and I got all our windows redone yesterday and today. The crew was wonderful and professional. They walked me through the entire job afterwards and answered my questions. They were respectful, despite working around me an a often screaming infant. Thank you so much Revival team! The windows and sliding door have never looked better."
Betsey Binet
"Revivals replaced five old windows in my house with sliding and double-hung windows. The quality is excellent. Revivals staff were friendly, courteous, and professional. The windows were ready on time, installation took less than four hours, and I couldn’t be happier with the results. I would not hesitate to recommend Revival to anyone who looking for quality workmanship and professional service."
Bryan Moffatt
"Revival did an amazing job replacing our windows, we couldn’t be happier! From their low pressure and knowledgeable sales team to a courteous and professional installation crew this experience was better than I could have hoped for. Our windows look amazing, keep our home noticeably cooler and much, much quieter from the reduction of outside street and wind noise. 10/10!"
michael welch
"Extremely satisfied with the entire process Revival did with our window upgrades. From the sales and marketing people to the install crew, everyone was friendly, professional, and informative. We feel like we are in good hands with them. Plus it’s a great window."
Blayne Graves
"My wife and I were very happy with our experience we had with Revival Windows. The install team was very clean, thorough and actually pretty quick with the install. We plan on using them again in the future when replacing our sliding glass door. I would recommend them to anyone looking for new windows. From start to finish, they made the process easy and seamless."
William
"Every step was super smooth. No pressure. Crew of josh, harry and osvaldo did an amazing job installing all 9 windows. Respected our house and property. Would recommend."
Zipporah Kofford
"Revival Windows is the best! Great people and great company. Would definitely recommend!"
Cyndi Lopez
"We recommend Revival windows for all your new window needs. The staff was excellent in communicating and responding to our needs fast and with top notch customer service."
Matthew Fincher
"These guys knock on my door, ended up sitting down with them and I couldnt believe the advertising program they were doing. Absolutely amazing everything worked out for both of us. I love love love my new windows"
Brianna Macfarlane
"If you’re looking for a window company THIS IS THE ONE! Most salesmen are pushy and annoying but these guys are honest, kind, and helpful. Definitely recommend."
Theresa Fernandez
"My entire house Revival Window install went awesome thanks to the great crew of Adrian,Align & Aden. I have been sitting here in awe of how great they look and feel. Also thanks to Hayden, Rick & Christi. Great Revival Window Team!"
Laurie Roos
"I was so pleased to have Revival windows installed in my home. Great customer service. Had no issues with installation. The crew was well trained, organized, friendly and took great care in working in and around my home. These are well manufactured windows, I’m loving them and can’t wait for the energy savings!"
Ms. Nichole
"My husband and I got all our windows redone yesterday and today. The crew was wonderful and professional. They walked me through the entire job afterwards and answered my questions. They were respectful, despite working around me an a often screaming infant. Thank you so much Revival team! The windows and sliding door have never looked better."
Betsey Binet
"Revivals replaced five old windows in my house with sliding and double-hung windows. The quality is excellent. Revivals staff were friendly, courteous, and professional. The windows were ready on time, installation took less than four hours, and I couldn’t be happier with the results. I would not hesitate to recommend Revival to anyone who looking for quality workmanship and professional service."
Bryan Moffatt
"Revival did an amazing job replacing our windows, we couldn’t be happier! From their low pressure and knowledgeable sales team to a courteous and professional installation crew this experience was better than I could have hoped for. Our windows look amazing, keep our home noticeably cooler and much, much quieter from the reduction of outside street and wind noise. 10/10!"
michael welch
"Extremely satisfied with the entire process Revival did with our window upgrades. From the sales and marketing people to the install crew, everyone was friendly, professional, and informative. We feel like we are in good hands with them. Plus it’s a great window."
Blayne Graves
"My wife and I were very happy with our experience we had with Revival Windows. The install team was very clean, thorough and actually pretty quick with the install. We plan on using them again in the future when replacing our sliding glass door. I would recommend them to anyone looking for new windows. From start to finish, they made the process easy and seamless."
William
"Every step was super smooth. No pressure. Crew of josh, harry and osvaldo did an amazing job installing all 9 windows. Respected our house and property. Would recommend."
Zipporah Kofford
"Revival Windows is the best! Great people and great company. Would definitely recommend!"
Cyndi Lopez
"We recommend Revival windows for all your new window needs. The staff was excellent in communicating and responding to our needs fast and with top notch customer service."
Matthew Fincher
"These guys knock on my door, ended up sitting down with them and I couldnt believe the advertising program they were doing. Absolutely amazing everything worked out for both of us. I love love love my new windows"
Brianna Macfarlane
"If you’re looking for a window company THIS IS THE ONE! Most salesmen are pushy and annoying but these guys are honest, kind, and helpful. Definitely recommend."
Ready to Upgrade to Retrofit Windows?
Schedule a free, no-pressure in-home estimate with Revival Windows. Our team will assess your home, recommend the best options, and walk you through every detail — all backed by our lifetime warranty.