FIBERGLASS WINDOWS by Pella Windows and Doors Produced from incredibly strong fiberglass, Pella Impervia® offers high-performing, low-maintenance fiberglass replacement windows that provide the quality finish that looks like painted wood. The Impervia line is made from Duracast, a patented fiberglass composite that battles warping in the summer months and doesn’t become brittle throughout winter. If you’re in Oklahoma City and searching for top-of-the-line durability and energy efficiency, while maintaining the impeccable visual attraction of a painted wood window, look no further than Pella Impervia. Backed by one of the most extensive warranties in the industry, Pella Impervia replacement windows require little to no maintenance, ensuring that your windows will look outstanding for many years. Pella Impervia® Pella Impervia® Incredibly strong fiberglass Duracast®. An extremely durable material available in windows and doors. Excellent performance. Exceptional energy efficiency. FIBERGLASS WINDOW COLOR OPTIONS Pella Impervia fiberglass windows offer countless color options to complement your space. We allow you the flexibility to pick the ideal windows at a budget you can afford. Pella utilizes an environmentally friendly painting process that removes VOCs, keeping the air in your home healthier. If you want a closer look at the Pella Impervia line, stop by our showroom in Oklahoma City or schedule a free in-home consultation and find the perfect windows for your home. Schedule Now!