Air that leaks through your home's envelope − the outer walls, windows, doors, and other openings − wastes a lot of energy and increases your utility costs. A well-sealed envelope, coupled with the right amount of insulation, can make a real difference on your utility bills.
Sealing leaks and adding insulation can improve the overall comfort of your home and help to fix many of these common problems:
Reduced noise from outside
Less pollen, dust and insects (or pests) entering your home
Better humidity control
Lower chance for ice dams on the roof/eves in snowy climates
Most Houses Will Benefit
Most homes in the United States don't have enough insulation and have significant air leaks. In fact, if you added up all the leaks, holes and gaps in a typical home's envelope, it would be the equivalent of having a window open every day of the year!