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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 how to insulate and air-seal dropped ceilings and soffits to prevent air leakage.

Guide describing how to correctly air-seal a wall with missing top plates or open wall cavities.

Guide describing how to air-seal bathroom and kitchen exhaust fans.

Guide describing how to retrofit older solid masonry homes to withstand seismic activity while including energy efficient retrofits.

Guide describing how to apply an air control layer directly over existing wall sheathing and cover with two layers of insulating sheathing held in place by vertical furring strips.

Guide describing ways to air-seal an attached garage in new and existing homes.