DIY Home Energy Audit

Simple leaks can sap home energy efficiency by 5 to 30% a year, according to the U.S. Department of Energy. So take a close look at places where two different building materials meet, such as corners, around chimneys, where pipes or wires exit and along the foundation. Make sure good seals form around doors and windows, and that no mortar is cracked. Any gaps or holes should be plugged and/or caulked.