If you have standard glass windows or doors with aluminum or wood frames in need of repair, you're probably losing a lot of the heat in the Winter and cool air conditioner in the Summer too. With Modern custom-fit replacement windows, you'll enjoy the beauty of a bright room and the benefit of more efficient heating and cooling. Nothing comes close to solid vinyl when you're talking about virtually maintenance free home improvements. Vinyl is durable and weather resistant, so it won't warp, crack, rot, chip or dent like wood or metal.