FIBERGLASS WINDOWS by Pella Windows and Doors Made from extremely tough fiberglass, Pella Impervia® offers high-performing, low-maintenance fiberglass replacement windows that deliver the quality appearance of painted wood. The Impervia line is made from Duracast, a patented fiberglass composite that resists warping in the summer months and doesn’t become brittle during the winter. If you’re in Washington DC and in the market for the best durability and high energy efficiency, while maintaining the outstanding visual allure of a painted wood window, then Pella Impervia windows are for you. Backed by one of the best warranties in the market, Pella Impervia replacement windows need little to no maintenance, ensuring that your windows will look amazing for many years. Pella Impervia® Pella Impervia® Incredibly strong fiberglass Duracast®. An extremely durable material available in windows and doors. Excellent performance. Excellent energy efficiency. FIBERGLASS WINDOW COLOR OPTIONS Pella Impervia fiberglass windows offer countless color options to complement your home. We allow you the flexibility to pick the best 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, stop by our showroom in Washington DC or schedule a free in-home consultation and find the perfect style for your space. Schedule Now!