Last updated: November 12, 2026
Which Window Brands Have the Best Warranties?
When you're shopping for replacement windows, it's easy to get caught up comparing styles, colors, glass packages, and prices. But there's another important detail that deserves just as much attention: the warranty.
A good warranty can tell you a lot about how a company stands behind its products. The challenge is that window warranties can be surprisingly difficult to compare. Some cover certain components for a lifetime, while others have separate coverage periods for glass, hardware, and frames. And just because a window comes with a lifetime product warranty doesn't necessarily mean the installation or labor is covered for life.
That's an important distinction.
At Zen Windows, we believe homeowners deserve more than a manufacturer warranty that covers the product but leaves them figuring out what to do when something goes wrong. That's why we provide two layers of protection: the manufacturer's product warranty and our own Double Limited Lifetime Warranty covering service, labor, and materials.
In this guide, we'll compare the warranty coverage offered by several well-known window brands, explain what the fine print actually means, and show you what to look for before choosing a window company.
At a Glance: How Do Window Warranties Compare?
Window warranties aren't all structured the same way. Some manufacturers offer lifetime coverage on certain components, while others provide different coverage periods depending on the product line. Labor and service coverage can also vary considerably.
Here's a general overview of how the companies compare.
Important: This chart is a starting point, not a substitute for reading the actual warranty. Coverage can change by product series, purchase date, location, and installation provider. Always request the written warranty for the exact windows you're purchasing.
Warranty terms are subject to the manufacturer's current written warranty and the specific product purchased. Zen Windows coverage is subject to its written Zen Windows Double Limited Lifetime Warranty.
1. Zen Windows: A Double Lifetime Warranty That Covers More Than the Product
We put Zen Windows at the top of this comparison for a reason.
When you purchase replacement windows, you aren't just buying a product. You're also trusting someone to install those windows properly and be there if you ever need help down the road.
Many people assume that a lifetime manufacturer's warranty means they're covered for anything that might happen to their windows. But product coverage and service coverage are two different things.
A manufacturer's warranty may cover a defective component, for example, but that doesn't automatically mean someone will come to your home, diagnose the issue, and take care of the repair.
That's where Zen Windows is different.
When you work with Zen Windows, you receive two warranties:
- The manufacturer's warranty: Covers the window product itself under the manufacturer's written warranty.
- The Zen Windows warranty: Provides lifetime coverage for service, labor, and materials under Zen's written Double Limited Lifetime Warranty.
Our commitment doesn't end when the installation is complete. If something goes wrong with a window, we're here to take care of it. That includes service, labor, parts, and even window breakage under the terms of our warranty.
We also handle warranty service ourselves rather than simply sending people somewhere else to figure things out.
It's a different way of thinking about a window warranty. Instead of asking only how long the manufacturer will cover the product, you should also ask who will actually be there to help when they need service.
“I think one of the biggest things homeowners overlook is what happens after the windows are installed. A manufacturer can offer a lifetime warranty on the product, but that doesn't necessarily mean someone is going to come out and take care of the problem. We believe that's our responsibility. If something goes wrong with a window we've installed, we want you to know you can call us and we'll be there to help. That's what standing behind your work should mean.”
Brian Zimmerman, Owner of Zen Windows Carolina
What Does the Zen Windows Warranty Cover?
Zen Windows provides a Double Limited Lifetime Warranty that includes:
- Service
- Labor
- Parts
- Window breakage
The warranty is transferable, so coverage can continue when you sell the home, subject to the written warranty terms.
The important distinction is that Zen provides its own warranty in addition to the manufacturer's product warranty. That means you aren't relying solely on the manufacturer if a service issue comes up.
Two Layers of Protection. One Company Standing Behind the Work.
With Zen Windows, you receive the manufacturer's product warranty plus Zen's own Double Limited Lifetime Warranty. Our coverage includes service, labor, parts, and window breakage for the life of the windows, subject to the written warranty.
2. Andersen Window Warranties
Andersen is one of the best-known names in the window industry, with several product lines and different warranty terms depending on which windows you purchase.
Andersen's warranty comparison information outlines different coverage periods for glass and non-glass components. For several major product lines, insulated glass coverage is generally listed separately from coverage for other window components.
Andersen also offers owner-to-owner transfer provisions on applicable warranties. However, you should review the specific terms for their product line rather than assuming every Andersen window has the same coverage.
One thing worth paying attention to is labor. A warranty covering a replacement component doesn't necessarily mean the manufacturer will cover the cost of having someone install it.
What to check: Make sure you understand the coverage for the glass, frame, hardware, and other components, as well as what happens if a repair requires labor.
3. Pella Window Warranties
Pella offers a range of window products, including wood, fiberglass, and vinyl options. Because its product lines differ, its warranties aren't all identical.
Pella maintains a Pella's warranty library where you can find the specific warranty documents for different products. Coverage periods and terms can vary for frames, glass, hardware, and other components.
Some Pella warranties include limited lifetime coverage for qualifying components, while other coverage periods are shorter. Labor coverage also depends on the applicable product warranty.
This is a good example of why it's important to know exactly which product you're purchasing. A general statement that a brand offers a lifetime warranty doesn't tell you everything you need to know.
What to check: Ask for the warranty document that applies to the exact Pella series in your quote. Pay particular attention to glass coverage, labor, and what happens if you sell your home.
4. Marvin Window Warranties
Marvin is known for its wood, fiberglass, and other premium window products. Like other major manufacturers, Marvin has different warranty terms depending on the product and component.
Marvin's warranty information outlines separate coverage for insulated glass units, hardware, and other non-glass components. The company's current warranty terms also include transferability provisions.
As with other brands, you should look beyond the headline coverage period. A warranty may cover a particular component for a specified period without covering the labor required to replace it.
If you're considering Marvin windows, ask the dealer to walk you through the specific warranty for the series you're purchasing.
What to check: Review the coverage period for insulated glass, hardware, and other components. Also ask whether labor, service calls, and installation-related repairs are covered.
5. ProVia Window Warranties
ProVia offers several window lines, including vinyl and other product options. Its warranty coverage varies depending on the specific product and components.
Certain ProVia window products offer lifetime limited coverage for qualifying components. Glass coverage and other terms can vary depending on the product and glazing package.
ProVia's warranty information also outlines transfer provisions for qualifying products. You should review the exact document for their product rather than assuming the same terms apply across every window line.
As with any manufacturer, it's important to understand whether the warranty covers just the replacement part or also the labor and service needed to address a problem.
What to check: Ask which ProVia product line is included in your quote, request the applicable warranty, and confirm the coverage for glass, hardware, and labor.
6. Simonton Window Warranties
Simonton specializes in vinyl windows and offers several product lines for replacement and new construction applications.
Its Simonton's limited lifetime warranty includes coverage for qualifying vinyl frame and sash components, with separate provisions for glass and hardware. The exact terms depend on the product and applicable warranty document.
One important detail to understand is that product coverage and labor coverage are not necessarily the same thing. A manufacturer may provide a replacement component without covering the labor required to install it.
If you're comparing Simonton with another vinyl window brand, make sure you're comparing the same components and coverage periods.
What to check: Review the terms for the frame, sash, insulated glass, and hardware. Ask specifically whether labor and service calls are included.
7. Milgard Window Warranties
Milgard offers several window product lines and warranty options. Coverage can vary depending on the product, the location where the windows are purchased, and the warranty level selected.
According to Milgard's warranty information, some products have standard warranty coverage, while select product lines offer upgraded coverage options. This means it's especially important to understand which warranty is included in the quote rather than assuming every Milgard window comes with the same protection.
If you're considering Milgard, ask the seller to explain the difference between the standard warranty and any available upgraded coverage.
What to check: Confirm the exact product series, warranty level, glass coverage, hardware coverage, and whether labor is included.
8. Renewal by Andersen Warranties
Renewal by Andersen offers replacement windows made with its Fibrex composite material. Its warranty includes separate coverage periods for different parts of the product and installation.
The company's published Renewal by Andersen's warranty information describes coverage for glass, Fibrex components, hardware, and professional installation. Those coverage periods are not all the same.
This is an important distinction. Even when a company includes installation coverage, you should understand how long that coverage lasts and what happens after it expires.
What to check: Review the coverage periods for glass, frame material, hardware, and professional installation. Also confirm the transfer provisions and any conditions that apply.
What Should You Actually Look for in a Window Warranty?
After comparing several window brands, you may have noticed that the word “lifetime” appears quite often.
But lifetime doesn't always mean the same thing.
Some warranties cover only certain components for the life of the original you. Others have separate coverage periods for glass, hardware, and frames. And some warranties may transfer to a new you, while others become more limited after a home is sold.
Here are five things worth checking before you make a decision.
1. What Does the Warranty Actually Cover?
Start by identifying which parts of the window are covered.
Look for separate terms covering:
- Window frames and sashes
- Insulated glass units and seal failure
- Hardware, locks, and balances
- Window operation
- Installation and workmanship
- Accidental glass breakage, if included
Don't assume that a warranty covering the window covers every component or every possible issue.
2. Does It Cover Labor?
This is one of the most important questions to ask.
Imagine that a window component fails five years after installation. The manufacturer agrees to provide a replacement part. That's good—but who pays someone to come to your home and install it?
Depending on the warranty, the part may be covered while the labor is not.
That can leave you with an unexpected expense even though the product itself is technically under warranty.
“One thing I always tell homeowners is to ask about labor. It's easy to look at a warranty and see that a part is covered, but that doesn't automatically mean the work to replace it is covered. If you need someone to come out, diagnose the problem, and make the repair, you want to know who's responsible for that. That's a big part of what we wanted to address with our own warranty at Zen Windows.”
Brian Zimmerman, Owner of Zen Windows Carolina
A Replacement Part Doesn't Always Mean a Free Repair. A manufacturer may cover the cost of a replacement component without covering the labor needed to install it. Before purchasing, ask whether the warranty includes service calls, labor, and installation-related repairs.
3. Is the Warranty Transferable?
If you sell your home, can the next homeowner benefit from the warranty?
Some manufacturers allow warranties to transfer to a subsequent owner, while others reduce coverage or impose conditions. Some warranties are tied to the original purchaser.
Transferability can be a meaningful benefit, especially if you're planning to sell your home in the future.
Make sure you understand whether coverage transfers automatically, whether registration or paperwork is required, and whether the coverage changes after the home is sold.
4. Are There Exclusions or Limitations?
Every warranty has terms and conditions. Some may exclude damage caused by improper maintenance, alterations, unusual environmental conditions, or other circumstances.
Read the exclusions carefully. If something isn't clear, ask the company to explain it before you sign.
You should also ask how warranty claims are handled. Is there a local team you can contact, or will you need to work directly with a manufacturer?
5. Who Will Actually Help You If Something Goes Wrong?
This may be the most overlooked question of all.
A warranty is only useful if you can get someone to help when you need it. Find out who handles service requests, how claims are submitted, and whether the company that installed your windows will still be there to help.
At Zen Windows, we believe that responsibility shouldn't end on installation day. Our Double Limited Lifetime Warranty is designed to give you a company they can call when they need help—not just a document telling them which parts may be covered.
“I've been in the window business for more than 30 years, and I think the relationship with the customer matters just as much after the installation as it does before it. Anyone can talk about a warranty when they're trying to sell you windows. What matters is whether they're willing to stand behind that promise years later. We want our customers to know exactly who to call if they ever have a problem.”
Brian Zimmerman, Owner of Zen Windows Carolina
Lifetime Warranty Doesn't Always Mean the Same Thing
The word “lifetime” sounds reassuring, but it's important to understand what a manufacturer means when it uses that term.
For example, a lifetime warranty might apply only to certain parts of the window. It might cover the original homeowner but provide reduced coverage after a sale. It may also exclude labor or service calls.
That's why comparing warranties based on one phrase isn't enough.
Instead, compare the actual coverage.
Before You Choose
Five questions to ask about any window warranty
So, Which Window Brand Has the Best Warranty?
There isn't one universal answer because warranties vary by product line, component, and manufacturer.
Andersen, Pella, Marvin, ProVia, Simonton, Milgard, and Renewal by Andersen all offer warranty programs with different coverage periods and conditions. Some provide lifetime coverage on qualifying components, while others have separate coverage periods for glass, hardware, and installation.
But there's another factor worth considering: whether the company selling and installing your windows will stand behind the work.
That's where Zen Windows takes a different approach.
Our Double Limited Lifetime Warranty gives you the manufacturer's product warranty along with Zen's own lifetime warranty covering service, labor, and materials. We handle warranty service ourselves, and we want you to know they can call us if something goes wrong.
We don't think you should have to figure out who's responsible after the installation is complete. We believe the company that installed the windows should be willing to stand behind them.
When you're comparing window replacement companies, don't just ask how long the product warranty lasts. Ask who will be there to help you when you need it.
Frequently Asked Questions About Window Warranties
Do all replacement windows come with a lifetime warranty?
No. Some replacement windows come with limited lifetime warranties, while others have shorter coverage periods. Even when a warranty is described as lifetime coverage, it may apply only to certain components or have different terms for the original homeowner and subsequent owners.
Does a lifetime window warranty cover labor?
Not necessarily. Some manufacturer warranties cover replacement parts but don't cover the labor required to install them. Always ask whether labor, service calls, and installation-related repairs are included.
Are window warranties transferable when you sell your home?
Some are, but the terms vary. Certain manufacturers allow transfer to a subsequent homeowner, while others reduce coverage or impose conditions. Check the written warranty before assuming coverage will transfer.
What is a double lifetime window warranty?
A double lifetime warranty generally refers to two separate layers of coverage: one from the window manufacturer covering the product and another from the window company covering installation, labor, or service. At Zen Windows, our customers receive the manufacturer's product warranty plus Zen's own Double Limited Lifetime Warranty, which covers service, labor, parts, and window breakage for the life of the windows, subject to the written warranty.
What happens if a window breaks under warranty?
It depends on the warranty. Some cover seal failure or defects in the insulated glass unit but may not cover accidental glass breakage. Other warranties include glass breakage coverage. Review the specific warranty to understand what is included. Zen Windows' Double Limited Lifetime Warranty includes window breakage coverage, subject to the written warranty.
Is a manufacturer's warranty better than a warranty from the window company?
They serve different purposes. A manufacturer's warranty covers the product under its written terms. A window company's warranty may provide additional coverage for labor, installation, and service. Ideally, you should understand both rather than relying on just one.
Final Thoughts
A window warranty is about more than how many years a manufacturer promises to cover a product. It's about knowing what is covered, understanding what isn't, and having someone to turn to if you ever need help.
As you compare window brands, take the time to read the actual warranty documents. Ask about labor, service, glass coverage, and transferability. And don't be afraid to ask the window company what happens after the installation is finished.
At Zen Windows, we believe standing behind our work is part of the job. That's why we provide our own Double Limited Lifetime Warranty in addition to the manufacturer's product warranty.
If you're considering replacement windows in the Charlotte area, we'd be happy to help you understand your options and answer your questions. No pressure, no long in-home sales presentation, and no money down.