Image via Wikipedia
If the amount of air that leaked from a typical home's gaps and cracks was measured, it would equal the amount of air that leaves through an open window.
This is why so many Home & Garden experts recommend a recaulking of your home prior to the Winter -- a solid caulk job can reduce a home's Winter energy bill by 20 percent.
In this 2-minute video from Home Depot, learn how you can to identify leaky windows, and then how to fix them using caulk, putty knives and a host of other tools. Or, if DIY is not your style, find a competent contractor online.
The project is small so the costs should be low.