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 look 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 in the winter. If you’re in San Antonio and searching for the best durability and high energy efficiency, while maintaining the outstanding visual allure of a painted wood window, Pella Impervia is a great choice. Protected by one of the most extensive warranties in the business, Pella Impervia replacement windows involve 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 numerous 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 greatly reduces VOCs, keeping the air in your home healthier. If you want a closer look at the Pella Impervia line, drop by our showroom in San Antonio or schedule a free in-home consultation and find the perfect windows for your home. Schedule Now!