Tag: relative humidity
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Five Ways to Deal with Crawl Space Air
Subtitle: The air in a crawl space can have a huge impact on a home’s durability and indoor environmental quality Images: If you have a home with a crawl space — or are building or buying one — you have several options on what to do with that particular foundation type. Most crawl spaces are…
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Vented Crawl Spaces and the Psychrometric Chart Are Not Friends
Subtitle: Replacing humid air with more humid air doesn’t work Images: Really, the argument about whether you should vent a crawl space in a humid climate is over. Advanced Energy’s research project from 2002 proved that closed crawl spaces outperform vented crawl spaces. A quick look at the psychrometric chart below shows that the argument…
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Should the Paper Facing of Batt Insulation Face the Inside or Outside?
Subtitle: The surprisingly simple answer follows from the variable permeance of kraft paper Images: If you install fiberglass batt insulationInsulation, usually of fiberglass or mineral wool and often faced with paper, typically installed between studs in walls and between joists in ceiling cavities. Correct installation is crucial to performance. * with a kraft paper vapor…