Updated October 19, 2026
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Product details cited from renewalbyandersen.com
Renewal by Andersen is the window and door replacement division of Andersen Corporation. Every window is custom-built from its exclusive Fibrex® material, then installed by installers the company trains and certifies. The windows aren’t sold in home improvement stores, and they can’t be bought for another contractor to install.
It’s a premium, appointment-based service focused on replacing existing windows and doors. This review covers how the frame material holds up, who does the installation, what the warranty covers, and what you may give up in exchange: mainly price and lead time.
Rating source: Google, count-weighted mean across 73 US locations with 100+ reviews (largest: Denver, CO, 6,982 reviews), verified August 2026
What Renewal by Andersen covers, how pricing and financing work, the materials it installs, and where it stands out.
| Customer rating | 4.8★ from 128,376 reviews: Google, count-weighted mean across 73 US locations with 100+ reviews (largest: Denver, CO, 6,982 reviews), verified August 2026 |
|---|---|
| What they install | Replacement windows, plus entry and patio doors (see our Renewal by Andersen doors review) |
| Window styles | Double-hung, casement, awning, gliding, picture, bay, bow, and specialty shapes |
| Pricing & financing | Custom pricing during the in-home design consultation, after precise measurements. There’s no published price sheet and no quotes by phone, because every project is built for a different set of openings. Financing offers are available. |
| Materials & glass | • Fibrex® composite material: combines the strength of wood with the low maintenance of vinyl • 2x stronger than vinyl, and withstands temperatures up to 150°F, after 30 years in a home1 • High-performance Low-E glass, double or triple pane; Low-E4® SmartSun™ glass for warm climates |
| Warranty | 20 years on standard glass and Fibrex® material, 10 years on components, 2 years on professional installation4. Nation’s Best Warranty Coverage† on Acclaim® and Acclaim Impact windows. |
| Strengths | • Windows are custom built to each opening • Exclusive Fibrex® material offers durability and low maintenance • Certified Master Installers • Warranty that covers installation |
| Consider alternatives if | • Timeline is short • Project is new construction • Want to hire your own installer or DIY |
Every Renewal by Andersen window frame is made of exclusive Fibrex® material which is 2 times stronger than vinyl.1 It’s a proprietary composite produced only by Andersen Corporation, so Renewal by Andersen is the only place to get it.
Fibrex® Material is made from reclaimed wood fiber and thermoplastic polymer that is fused together and is exclusively produced by Andersen Corporation. [It] combines the strength and stability of wood with the low-maintenance features of vinyl.
Renewal by Andersen, published material description (renewalbyandersen.com). Trademark forms set per Renewal by Andersen brand standards.
The more useful question is how it holds up over decades. Renewal by Andersen points to testing of window units removed from a Minnesota home 30 years after installation. According to the company:
Strength. A stronger material allows for slimmer frames and slimmer frames translate to more glass within the same opening. Essentially you’ll be adding more natural light to the space.
Stability. Fibrex® material is designed to stay strong through extreme temperature changes, which helps frames resist warping and cracking.4 The difference matters most in regions with hard winters or intense summer sun, and less in mild climates.
Efficiency. Fibrex® material is energy efficient. Paired with high-performance Low-E glass, it helps keep homes comfortable and reduce energy loss, especially compared with older aluminum frames, which conduct heat.
| Feature | Fibrex® composite | Vinyl | Wood |
|---|---|---|---|
| Upfront cost | Higher | Lower | Higher |
| Extreme heat and cold | Stays strong through big swings | Fine in mild climates; durability can suffer in extremes | Needs upkeep to handle moisture and weather |
| Maintenance | Low | Low | Regular painting or staining |
| Look | Slimmer frames, more glass | Typically wider frames | Natural, traditional; paint or stain to match |
| Best for | Long-term durability and value | Lower budgets and milder climates; a solid value choice | Traditional or historic homes, and the most finish options |
Replacement windows are made in two basic ways. Some companies use standard sizes and fit them to the opening with shims and cuts. Renewal by Andersen builds each window to its opening. That choice shapes the process below.
1. Design consultation. A design consultant comes to your home, walks you through styles, finishes, and glass options, and measures each opening precisely. You get your pricing during this visit, once measurements are taken.
2. Measure and manufacture. Each window is built to your exact opening, to within 1/16 of an inch. Lead time depends on project size.
3. Professional installation. Renewal by Andersen’s Certified Master Installers handle the whole job: removing the old windows, preparing the openings, setting the new units, finishing the trim inside and out, and cleaning up. Installations can be completed in as little as a day.
4. Follow-up and warranty support. After installation, follow-up and warranty service run through the local affiliate that did the work. It rounds out what the company calls its Signature Service, a start-to-finish process designed to make the project as smooth and stress-free as possible.
A budgeting tip: most projects stay true to the original estimate. Some issues, like rotted framing or water damage, can’t be seen until the old window comes out, though. It’s smart to leave a small cushion for what’s hidden in the walls.
Style, glass, and performance can be configured for the home and climate. The main lines:
Renewal by Andersen markets its warranty as “Nation’s Best Warranty Coverage.” The company says its coverage on Acclaim® and Acclaim Impact windows is the only warranty among top-selling window companies that meets every one of these requirements†:
| Requirement | What it means for you |
|---|---|
| Easy-to-understand terms | Written in straightforward, easy-to-understand language |
| Unrestricted transferability | Coverage can pass to the next owner if you sell, which can help add value to your home. |
| Installation and labor coverage | The workmanship is covered, not only the window. |
| Geographically unrestricted | Coverage isn’t limited by where you live. |
| Exterior color, insect screens, and hardware | The parts that wear most visibly are included. |
| No maintenance requirement | Coverage doesn’t depend on following a maintenance schedule. Some “lifetime” warranties include maintenance requirements that can limit coverage. |
Standard limited warranty terms include 20 years on standard glass and Fibrex® material, 10 years on components, and two years on professional installation.4
Read the fine print, with any company. Compare warranty documents carefully to understand coverage differences.
Renewal by Andersen can be a pricier option; however, you should also consider what you’re paying for. This is a premium product that is custom-built, manufactured and installed specific to your home. Prices will depend on your project size, styles, glass package as well as repairs discovered during installation. You don’t have to replace every window at once. One window, the whole house, or a phased project are all options.
The value case rests on its longevity. Fibrex® material is built for long-term durability, making it a cost-effective choice over time. Energy-efficient glass can help lower utility bills over the life of the windows, and a transferable warranty is a selling point should you decide to list your home.
A good fit if you plan to stay in your home long-term, live where seasons swing hard, and would rather have one company responsible for measuring, building, installing, and backing the windows. Homeowners replacing older aluminum or failing vinyl windows tend to notice the biggest difference in comfort and energy use. If installation coverage and trained installers are high on your list, it’s worth getting a quote.
Worth exploring alternatives if upfront price is your deciding factor and long-term durability is less of a concern. A tight timeline or a new-construction project may also point elsewhere, and pricing comes only after an in-home measurement.
Claim substantiation and required disclosures:
1. Fibrex® 2x stronger / 150°F: Six window units were tested in a Minnesota home 30 years after installation. Visit renewalbyandersen.com for warranty information. See Renewal by Andersen Products and Installation Transferable Limited Warranties for details.
2. Low-E4® SmartSun™ 70%: Values are based on comparison of Renewal by Andersen® double-hung window U-factor to the U-factor for clear dual-pane glass non-metal frame default values from the 2006, 2009, 2012, 2015, and 2018 International Energy Conservation Code “Glazed Fenestration” Default Tables.
3. Coastal Impact: Tested to AAMA/WDMA/CSA 101 I.S.2/A440-08. Performance values vary by product. View product performance data at renewalbyandersen.com/options/coastal-impact. See your local code official for building code requirements in your area.
4. Warranty terms: See Renewal by Andersen Products and Installation Transferable Limited Warranties for details.
† Nation’s Best Warranty Coverage: It is the only warranty among top selling window companies that meets all of the following requirements: easy to understand terms, unrestricted transferability, installation coverage, labor coverage, geographically unrestricted, coverage for exterior color, insect screens and hardware, and no maintenance requirement. Visit renewalbyandersen.com/nationsbest for details.
5. ENERGY STAR® Partner: “ENERGY STAR” is a registered trademark of the U.S. Environmental Protection Agency.
Fibrex® is a registered trademark of Andersen Corporation. Fibrex® Material is manufactured solely by Andersen Corporation and is not available from any other window manufacturer.
Renewal by Andersen® and all other marks where denoted are trademarks of Andersen Corporation. © 2026 Andersen Corporation.
