Download PDF version (182.5k) Log In or Register to view the full article as a PDF document.
Crawlspace Ventilation What happens when the builder knows how to do it right, but the codes haven't caught up yet? That's pretty much where we stand right now with crawlspace construction. Thanks to solid research done in the late 1980s and early 1990s by Princeton Energy Partners, Florida Solar Energy Center, and the University of Illinois's Building Research Council, quality builders know that a crawlspace should be carefully sealed and insulated (see Figure 1, next page). Otherwise, you invite serious moisture problems, especially in hot, humid climates. "The problem is, most building codes still require ventilation in the crawlspace," says John Tooley, a building science specialist with Advanced Energy of Raleigh, N.C. "That puts builders in a real bind. Either they build it wrong