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Recommendations for Effective Water Barrier | Foard Panel

Recommendations for Effective Water Barrier

Water Barrier Moisture Mitigation Photo Courtesy of Alex France Indoor Humidity is a Fact of Life, But Rot is NOT Photo Courtesy of Alex France In super tight homes, indoor humidity, left unchecked, can build up to ultra high levels. Particularly during the heating season, when indoor humidity is higher than outdoor humidity, a house develops a positive vapor pressure. The pressure seeks the path of least resistance in order to equalize. Vapor finds its way out through panel joints or minor spaces around door and window openings or other penetrations. In doing so, it will condense into water upon reaching the dew point; either near the cold side of the wall, but still within the wall, or just behind your building paper. For obvious reasons, water in either of those places is not a good thing. Wind driven rain and capillary action can cause water to run uphill, easily penetrating your siding or roofing. Furthermore, when exterior finishes are installed directly to the wall, with no air space, a difference in air pressure on either side of the siding will cause water to be drawn to the backside. Moisture Migration is referred to often throughout our building science section. There are four very important things that you can do to help prevent this issue from ever becoming a problem in your home.

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