Sealing air leaks

The Old House Web

On a windy day, hold a lit incense stick next to your windows, doors,electrical boxes, plumbing fixtures, electrical outlets, ceiling fixtures, attichatches, and other locations where there is a possible air path to the outside.If the smoke stream travels horizontally, you have located an air leak that mayneed caulking, sealing, or  weather-stripping. -- Department of Energy

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