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Guide describing how to retrofit an exterior wall and/or attic to provide continuous air sealing.

This guide describes how to install a rigid air barrier to separate the porch attic from the conditioned space.

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 the installation of insulating sheathing above the roof deck on existing homes. This retrofit assembly is appropriate for homes with conditioned attics or where the retrofit is intended to create a conditioned attic.

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

Guide describing how to re-roof an existing home with a sloped roof and add insulation above the roof deck.

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 the floor of the attic in existing homes.

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

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

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

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

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

Guide describing causes of condensation in attics and roof assemblies during cold weather and ways to reduce this condensation.

Guide describing options for insulating and air sealing at either the attic floor or along the roof line in new homes.

Guide describing the installation of roof vents that are resistant to damage from high winds and entry of wind-borne rain, wildfire embers, or pests.

Guide describing method for installing ducts in a duct chase in a dropped ceiling.

Guide describing method for designing and installing ducts in a raised ceiling chase.