One of the best ways to prepare a home for the winter weather and high energy costs is to take time now, before winter arrives, to do some simple home maintenance.
The first and most important step in weatherizing a home is to stop air leaks. If air leaks aren't stopped first, other weatherizing measures like insulation will be a waste of effort and money. Stopping air leaks in a home can save as much as 40 percent on your home's heating and cooling costs.
<b>Source:</i> Iowa Energy Center
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Weatherizing Your Home