May 2006
by Clayton DeKorne
Sealed Crawlspaces in Flood Zones
First 100 Words:
Soundings: Sealed Crawlspaces in Flood Zones Clayton DeKorne Q: How do you detail a sealed crawlspace for a flood zone? Do we have to insulate the floor, or can we just insulate the crawlspace walls? A: Insulation in the floor is inevitably interrupted by wires, pipes, ductwork, and bridging. In a typical first floor, these interruptions make it next to impossible to get a tight air seal, which is often a more critical element to the energy and moisture performance of any building enclosure than the R-value the insulation provides. But depending on the flood zone, insulating the floor may
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