FIBERGLASS WINDOWS by Pella Windows and Doors Made from incredibly strong fiberglass, Pella Impervia® offers high-performing, low-maintenance fiberglass replacement windows that provide the quality look 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 South Portland and looking for the best durability and exceptional energy efficiency, while maintaining the impeccable visual allure of a painted wood window, look no further than Pella Impervia. Backed by one of the top warranties in the business, Pella Impervia replacement windows involve little to no maintenance, ensuring that your windows will look great 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 greatly reduces VOCs, keeping the air in your home healthier. If you want a closer look at the Pella Impervia line, stop by our showroom in South Portland or schedule a free in-home consultation and find the perfect style for your space. Schedule Now!