FIBERGLASS WINDOWS by Pella Windows and Doors Created 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 battles warping in the summer months and doesn’t become brittle during the winter. If you’re in St. Paul and searching for top-of-the-line durability and exceptional energy efficiency, while maintaining the outstanding visual appeal of a painted wood window, Pella Impervia is a great choice. Backed by one of the best warranties in the business, Pella Impervia replacement windows need little to no maintenance, ensuring that your windows will look great for years to come. 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 numerous color options to complement your home. We allow you the flexibility to pick the perfect 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 to take a closer look at the Pella Impervia line, drop by our showroom in St. Paul or schedule a free in-home consultation and find the perfect style for your room. Schedule Now!