Cornerstone Premium Double-Hung Windows
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Cornerstone Premium Double-Hung Windows
The traditional design of Cornerstone Double-Hung Windows make them the perfect choice for homeowners who want the best. They combine functional beauty, balanced daylighting, and an array of decorative options that allow you to enhance your environment.
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Traditional Beauty
- Equal sightlines
- Coved glazing beads
- Classic wood-like design
Unsurpassed energy efficiency
- Optimal 7/8“ insulating glass unit
- ClimaTech® hight performance glass
- AllWeather™ sloped sill
- Heavy-duty Mylar weatherstripping
- Multi-chambered frame and sash profiles
Maintenance freedom and ease of use
- Everlast™ virgin PVC vinyl never needs painting or staining
- Both sashes tilt-in for easy cleaning
- ConstantForce™ balances make raising and lowering sashes easy
Lifelong strength and durability
- InterWeld™ fusion-welded sashes
- Heavy-duty locking and operating hardware
- Dual locks on all windows over 25“ wide
- Lifetime Limited Transferable Warranty