When homeowners shop for replacement windows, they often focus on glass packages, energy efficiency, and aesthetics. But at Windows of Wisconsin, we know one of the most important and overlooked factors is the warranty.
Because here’s the truth:
A window is only as good as the company willing to stand behind it.
After reviewing and comparing warranties from Renewal by Andersen, Pella (vinyl, wood, and Impervia fiberglass), and Infinity by Marvin, one thing becomes clear:
Not all “lifetime” or “limited” warranties are created equal.
Infinity by Marvin: Built to Last and Backed That Way
Infinity by Marvin offers what homeowners actually want: long-term, real-world protection without fine print that works against you.
True Limited Lifetime Coverage (Not Just Marketing Language)
Infinity covers fiberglass frames and non-glass components for as long as you own and occupy your home.
Compare that to competitors:
• Pella Impervia: Lifetime coverage only for original owner and becomes 10 years when transferred
• Pella Vinyl: Same limitation, non-transferable lifetime
• Renewal by Andersen: 20-year max on major components
Infinity maintains stronger long-term value for homeowners planning to stay in their home.
Strong Glass Warranty Without Compromise
Infinity includes:
• 20-year coverage on insulating glass seals
This is comparable on paper, but here’s the difference:
• Competitors often include strict labor limitations (often just 2 years)
• Infinity focuses on product integrity over time, not short-term service windows
At Windows of Wisconsin, we see fewer long-term service issues with Infinity because the product is engineered to perform.
No “Gotcha” Transfer Penalties
When you sell your home:
• Infinity transitions to a 10/20 warranty structure
But compare that to competitors:
• Pella warranties often downgrade significantly or become limited/non-transferable
• Renewal by Andersen caps coverage at fixed timelines regardless of ownership
Infinity provides clear, predictable coverage, not confusing step-downs.
Built for Real Life, Not Just Ideal Conditions
All manufacturers list exclusions but the degree matters.
Across Pella warranties, we see extensive limitations around:
• Installation requirements voiding coverage
• Environmental conditions (humidity, heat, moisture systems)
• Building design responsibility shifted to homeowner
Renewal by Andersen similarly excludes:
• Water infiltration (unless strictly manufacturing-related)
• Structural movement
• Many common real-world conditions
Infinity does include exclusions (as all brands do), but maintains a more straightforward approach:
• Covers manufacturing defects clearly
• Focuses on product performance, not legal loopholes
Translation: Less finger-pointing. More accountability.
Fiberglass That Matches the Warranty
A warranty is only as good as the material behind it.
Infinity’s Ultrex® fiberglass:
• Doesn’t expand/contract like vinyl
• Won’t rot like wood
• Maintains structural integrity long-term
That’s why Marvin can confidently offer long-term coverage.
Meanwhile:
• Vinyl warranties often exclude warping or performance over time
• Wood warranties require ongoing maintenance compliance
• Fibrex® (Renewal by Andersen) still carries 20-year limitations
Infinity’s warranty aligns with its material durability, not marketing claims.
The Windows of Wisconsin Perspective
At Windows of Wisconsin, we’ve installed thousands of replacement windows across Wisconsin homes. We don’t just read warranties, we see how they perform in the real world.
Here’s what we’ve learned:
• The best warranty is the one you never have to use
• The second-best is one that actually protects you when you need it
That’s why we trust and recommend Infinity by Marvin.
It delivers:
• Long-term homeowner protection
• Durable fiberglass construction
• Clear, honest warranty terms
Final Takeaway: Don’t Be Misled by “Lifetime” Labels
Many window companies advertise “lifetime warranties.”
But when you read the fine print, they often mean:
• Limited to original owner
• Reduced after transfer
• Labor excluded after 2 years
• Strict conditions that void coverage
Infinity by Marvin stands apart by offering:
✔ Real lifetime coverage for homeowners
✔ Strong material-backed durability
✔ Straightforward, transparent terms
Ready to Choose a Window That’s Built and Backed to Last?
If you’re comparing window options, don’t just look at the product, look at the promise behind it.
At Windows of Wisconsin, we’ll walk you through the differences and help you choose a window that performs for decades, not just the first few years.
