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Where are the big air leaks in my attic? Follow

Typically, the biggest attic leaks are found where the walls meet the attic floor, duct runs, above drop ceilings and overhangs, in knee-walls, and uncovered whole house attic fans.  Look for dirty or discolored insulation to find leaks hidden under insulation. This indicates that air is moving through the insulation material. There are lots of other holes in the attic floor that should also be sealed, such as: recessed can lights, plumbing stacks, electrical wires, attic hatches or doors, and around chimneys or flues. Visit Seal and Insulate with ENERGY STAR for more information.

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