For this Marvin Infinity window installation in Allentown, NJ, we replaced the home's existing wood double hung and picture windows. You can see the damage that had occurred to the wood over time. The main benefit these homeowners will see is the durability that Marvin Infinity windows provide. The fiberglass frame resists cracking and welling when exposed to hot and cold weather and moisture. Plus, the thinner profile allows for much more glass space resulting in more light coming in and more gorgeous, sleek windows.