Did you know that 10 to 25 percent of your heating and cooling costs might be flying right out your windows? If you're not quite ready to fork out the $12,000 or more you'll need to put in new, high-efficiency units, then installing storm windows is your best option. Triple-track windows—they hold two glass sash and one screen that slide up and down on separate tracks—from Larson Manufacturing cost about $100 each and can reduce heat loss through your existing windows by 25 percent (even more if fitted over inefficient single-pane windows). They may not be as pretty as replacement windows, but sometimes it's better to feel good than look good.
Watch as This Old House
general contractor Tom Silva shows you the proper way to install a new storm window.