The best replacement window material type for your home Pella® of Gaithersburg, MD is devoted to providing you the ideal replacement window options for your home. With several unique window series and three window material types, you’re sure to find the perfect replacement windows to fit your space. Whether you’re considering wood windows, vinyl windows or fiberglass windows, we have a wide variety of options to meet your needs and your budget. If you’re wondering what window material is best for your room, schedule an in-home consultation with a member of our experienced staff. Or, stop by one of our local showrooms to view one of the most comprehensive selection of sizes and styles that we offer in the Gaithersburg area. Our selection of replacement windows permits our showroom staff to work with you to meet the needs of your space while staying within your budget. Looking to get a preview of our assortment of window options before you visit one of our showrooms? You can also find our collection of window options on our windows styles page.