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Guide describing how to insulate a vented attic in an existing home using blown insulation added to the attic floor.

Guide describing how to add spray foam insulation to the underside of the existing roof deck as part of the conversion of a vented attic to an unvented, insulated attic.

Guide describing how to insulate and air-seal attic knee walls and floor joist cavities under knee walls.

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

Guide describing ways to seal drywall to the top plate of an exterior wall to air-seal the wall cavity.

Guide describing options for designing and locating the thermal boundary at either the attic floor or along the roof line in new and existing homes.

Guide describing methods for insulating an unvented attic along the roof line.

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

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

Guide describing how to apply spray foam insulation to ceilings in existing homes.

Guide describing how to air-seal and insulate a ceiling where the insulation is installed on top of the ceiling (on the attic floor) in a vented attic.

Guide describing how to air-seal duct and flue shafts.

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

Guide providing guidance on insulating attic eaves in new and existing single-family homes and multifamily buildings.