Who makes the best fiberglass replacement windows?

FACT:  Ultrex Fiberglass is eight times stronger than vinyl, three times stronger than wood composites, and has the tensile strength of steel. So when a house settles and time marches on, Infinity replacement windows stay true and resist sagging — proving that they’re truly the best fiberglass window on the market.

Ultrex fiberglass gives homeowners windows and doors that are...

• Low Maintenance – Ultrex performs beautifully for years to come, with a finish that requires virtually no maintenance.

• Energy Efficient – Ultrex’s minimal thermal conductivity serves as a built-in insulated barrier against the elements – reducing heating and cooling costs.

• ENERGY STAR® certified – The Energy Department estimates that by installing ENERGY STAR-RATED windows, the average U.S. household can reduce its annual energy bill by 15 percent.

• Environmentally Friendly – Ultrex takes less energy to create – about 80 percent less than aluminum and about 40 percent less than vinyl. Also, it’s made mostly of glass, which is made from sand and gravel – a plentiful resource.

• Beautifully Designed – Made by wood window experts at Marvin, Infinity features traditional profiles and details that are more attractive than the “flat” appearance of other materials. Ultrex ensures it will stay beautiful for years to come.