Incredibly strong fiberglass. Pella Impervia windows and patio doors combine the beauty and energy efficiency you expect from Pella with the durability of Duracast material that can withstand extreme heat and subzero cold.
- Made with Pella’s patented fiberglass material, Duracast
- Exceptionally energy efficient and durable in extreme heat and cold
- Versatile design features and options to deliver any style