The market expands and the best manufacturers rise to the top.
Fiberglass windows are not as common as other types of windows today, although more and more window manufacturers are considering producing this new type of window.
Marvin offers a line of replacement windows called Integrity that provides high performance and low maintenance. These fiberglass windows come in single/double hung, glider, and polygon. Read More on Marvin fiberglass windows
Milgard was one of the first major window manufacturers to begin production of fiberglass windows. It currently offers the Ultra Series and WoodClad of fiberglass windows. Read More on Milgard fiberglass windows
Offer a number of fiberglass options, focusing on energy efficiency and physical strength. See site for details on available windows. Read More on Fiberframe windows
Pella offers a line of windows made with Duracast® - a fiberglass composite that is 9 times stronger than vinyl and twice as strong as aluminum. Pella Impervia® replacement windows come in single/double hung, fixed frame, sliders and special shapes. Read More on Pella fiberglass windows