Most of us never think about how much air leaks in through electrical switches and receptacles. It happens because all wires that bring power to switches and outlets invariably lead back to holes drilled through walls! In older homes, these holes were rarely sealed. Even in newer so-call "air-tight" homes, attic air can still get down into walls from above. The stuff offered here helps reduce air leakage and saves you money on your heating and cooling costs!
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