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Guide describing how to increase insulation in existing homes by installing batt insulation on the ceiling plane of a vented attic.

Guide describing principles of insulating and air sealing band joists as a stand alone energy upgrade, or as part of creating a closed crawlspace.

Guide describing wind washing and how to prevent it.

Guide describing buried ducts in loose-fill attic insulation, a method that can only be used in dry climates.

Guide describing how to insulate an existing slab floor by adding rigid foam insulation over the slab then installing a floating subfloor.

Guide for designing and installing interior ducts in an interstitial floor cavity in new and existing homes.