Window Certifications

Our replacement windows are certified by Energy Star.

Slocomb Window and Door replacement windows, sold by Keystone Window of Pennsylvania, is supported and confirmed by several nationally-recognized organizations responsible for maintaining ratings and standards for windows across the industry.  Our replacement windows are some of the most energy efficient on the market, will be professionally installed by our own factory direct, certified crew, and are backed by a Transferable Lifetime Warranty.  You won’t find a better value anywhere else!

To learn more about our certifications, please visit the following pages:

  • Lead Safety: The health and safety of our customers is our top priority.  We are certified by the Environmental Protection Agency (EPA), and our installation crews are properly trained and equipped to safely remove lead paint when installing your replacement windows.
  • National Fenestration Raging Council (NFRC): All Slocomb Window and Door replacement windows, sold by Keystone Window of Pennsylvania, are certified by the NFRC.
  • American Architectural Manufacturers Association (AAMA): Slocomb Window and Door replacement windows, sold by Keystone Window, are all Gold Label certified by the AAMA.
  • Energy Star: All Slocomb Window and Door replacement windows, sold by Keystone Window of Pennsylvania, are Energy Star certified.

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