For this Marvin Infinity Bay Window Installation in East Hanover, NJ, we completely replaced the existing wooden windows. The main problem with the existing windows were the cracks that formed. Wood, much like vinyl, is susceptible to expanding and contracting with the seasons, which forms cracks. This creates the potential for drafts and moisture damage. This Marvin Infinity window replacement features the sustainable wood grain interior finish, Everwood, which is virtually maintenance free. Marvin Infinity's fiberglass frames are also resistant to expanding and contracting leading to those cracks.