Masonry Magazine August 2008 Page. 31
Air barrier systems are essential for getting rid of moisture that gets behind masonry walls. Typically installed on the outward-facing side of a structural wall, air barriers help keep water out of the building envelope, says Gary Henry, business communication specialist for PROSOCO Inc. in Lawrence, Kan.
"Water worms its way in through failed mortar joints, gaps where the wall meets the roof and foundation, and from wind-driven rain," Henry says. "On warm, humid days, warm, moist air can find its way in through those same pathways, until it drops its moisture on cold pipes or on drywall cooled by air conditioning. [In] hot or cold weather, wet walls have reduced R-value, which kicks up heating and cooling costs. And, of course, wet walls are susceptible to mold."
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CIRCLE 219 ON READER SERVICE CARD
August 2008
Masonry 29