10/04/2026
Should I buy an Alum Clad window LUV?
When comparing Renewal by Andersen to LÜV Window, I wouldn’t make the decision based on “triple pane” or one SHGC number alone in Washington State. Those are only pieces of the performance story.
Here’s what I would compare:
LÜV WINDOW vs. RENEWAL BY ANDERSEN Let’s compare
🪟 Glass
LÜV: Triple-pane options, including heavy glass configurations.
Renewal: Multiple high-performance Low-E glass packages, including options designed around climate and solar exposure.
☀️ SHGC
A lower SHGC isn’t automatically a “better window.” It simply means less solar heat passes through the window. The right SHGC depends on climate, orientation and the application.
And the claim that Renewal “can’t touch an SHGC below .20” isn’t accurate. Renewal has NFRC-certified configurations reaching below .20.
🌡️ ENERGY PERFORMANCE
Don’t compare windows based only on glass thickness or number of panes.
Ask for the NFRC label for the exact window being quoted and compare:
• Whole-window U-Factor
• SHGC
• Air leakage
• Visible transmittance
• Exact glass/frame configuration
🏠 FRAME
LÜV offers several window systems and materials.
Renewal’s replacement windows use Fibrex® composite material, engineered to provide the strength and stability needed for a replacement window while maintaining narrower frames and more glass area.
🔨 INSTALLATION
This is a huge one.
A premium window installed poorly can become a very expensive mediocre window.
Renewal by Andersen is a full-service replacement company. The product, custom measurement, manufacturing, professional installation and service are part of one system.
🛡️ WARRANTY
Renewal’s current limited warranty includes:
✓ 20 years on standard glass
✓ 20 years on Fibrex® material
✓ 10 years on locks, hinges and other components
✓ 2 years on professional installation
✓ Parts and labor for covered claims
✓ Fully transferable
That’s important because you’re not trying to determine whether a problem belongs to the window manufacturer or installer.
BOTTOM LINE
LÜV can absolutely make a high-performance window. I’m not going to pretend otherwise.
But “triple pane + 6mm tempered glass + SHGC below .20 = better window” is an incomplete comparison.
If you really want to know which window is better, put the exact NFRC-certified windows side by side, then compare the frame, air infiltration, installation, warranty and who will actually stand behind the entire project 10–20 years from now.
That’s the comparison I’d want to make before spending thousands of dollars on my home.