Here are some of the few reason why replacement windows is really important: You Want Your Home To Be Comfortable - Old windows can take that comfort away like a breeze—or with a breeze, rather. Older windows leak air, both in and out. You Want Lower Energy Bills - Once the windows are in place, the air leaks stop and your energy stays inside where you actually need to use it. You Want High Curb Appeal - When you have new windows installed, your house has a fresh new look that revolutionizes its appearance—both inside and out.