Glass Replacing

Stop throwing money out your old windows, warn some manufacturers' commercials. While new windows can reduce your energy bill, don't expect to recoup your investment anytime soon.

Replacement windows can save you between 10 and 25 percent per year on heating and cooling if you have single-paned windows. But they cost between $7,000 and $20,000 for an average house. Custom sizes can add about 15 percent. So new windows probably won't save enough energy for you to pocket any net savings for 20 years or more. But they can make your home more comfortable, quiet, and attractive.