FIBERGLASS WINDOWS by Pella Windows and Doors Produced from amazingly durable fiberglass, Pella Impervia® offers high-performing, low-maintenance fiberglass replacement windows that provide the quality appearance of 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 during the winter. If you’re in Calgary and looking for the best durability and energy efficiency, while still gaining the impeccable visual allure of a painted wood window, Pella Impervia is a great choice. Covered by one of the most extensive warranties in the market, Pella Impervia replacement windows need 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. Outstanding energy efficiency. FIBERGLASS WINDOW COLOR OPTIONS Pella Impervia fiberglass windows offer a variety of 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 eliminates VOCs, keeping the air in your home healthier. If you want a closer look at the Pella Impervia line, come by our showroom in Calgary or schedule a free in-home consultation and find the perfect windows for your home. Schedule Now!