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What Makes Our Windows So Good?Better InsulationPatented UltraCore® insulation delivers the best insulation available on any window. Better than aluminum, wood or foam-filled PVC windows.
High Impact uiPVC VinylNot all vinyl is the same. Our windows are clad in a specially formulated, ultra-strong vinyl that delivers the following features:
Tighter Frame Construction & Weather StrippingOur window frames have the industry’s lowest Air Infiltration Rating, meaning less transfer of air from the outside into your home, and less air flowing from your home to the outside. In addition, our triple layer weather stripping is strategically located for maximum energy efficiency.
A Better Glass SystemOur KR-90 glass system consists of three layers of glass: two layers of low-E “Ultra-U Plus” glass and an additional layer of insulating/sound absorbing glass. The space between panes is filled with high density Krypton gas, guaranteeing additional insulation and reducing condensation.As a result, our Vanguard window earns an astounding 0.18 U-factor rating from the NFRC.
Advanced Spacer SystemYou can’t see them, but the “spacers” used to separate panes of glass in your window are critical to its performance. Our exclusive XLEdge spacers use “warm-edge” technology to provide superior performance.
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Licensed in the Commonwealth of Massachusetts
License # (101609) (057733)


