Focus on Energy: Why Not Slash the Vapor Barrier?

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“And then you take a knife and do this…,” Jim said while casually slicing the foil facing of the 4-inch fiberglass ceiling insulation. Even at age 15, it seemed odd to me to put it in and then slash it. But I did. After all, Jim had the wisdom of 24 or so years behind him and it was kind of fun whaling away at the stuff with an old 12-iinch butcher knife. “Hey! Watch out for that wire, it’s hot…” from Jim slowed me down. “So why do we put it up and then punch holes in it”? I asked. “Lets the water out,” said Jim. “Oh.” Theory vs. Reality As with many of you, that’s

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About the Author

Terry Brennan

Terry Brennan is a building scientist, educator, and a consultant who specializes in environmental health, including mold and pest issues. He is president of Camroden Associates in Westmoreland, N.Y.

About the Author

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