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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 compartmentalization in multifamily buildings - the separation of dwelling units from each other and from common areas in terms of air flow.

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

Guide describing how to air-seal attic access panels, doors, and stairs to provide a continuous air barrier at the ceiling.

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

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 duct and flue shafts.

Guide describing how to air-seal electrical wiring throughout a home.

Guide describing how to air-seal around light tubes.

Guide describing how to air-seal common walls between dwelling units in multifamily housing.

Guide describing how to air-seal around plumbing and piping penetrations through walls, ceilings, and floors.

Guide describing how to air-seal around recessed light fixtures below unconditioned space.

Guide describing how to correctly seal structural insulated panel (SIP) seams.

Information guide providing links to guides describing specific ways to air-seal, insulate, and ventilate attics and roofs to minimize heat gain in new and existing homes.

Guide discussing disaster resistance related to asphalt shingle roofing when installing roofing on new construction or when repairing or replacing roofing on existing homes.

Information guide describing proper attic air-sealing, insulation, and ventilation to combat ice dam formation on roofs in cold climate zones.

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

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

Guide describing application of a radiant barrier layer in the attic to block radiant heat transfer between hot surfaces and heat-absorbing surfaces.

Information guide describing the use of attic ventilation fans to mechanically pull outside air through the attic in an attempt to cool the attic, control moisture, and prevent ice dams.

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 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 a vented attic in an existing home using blown insulation added to the attic floor.

Roofs & Attics

Above Deck Rigid Foam Insulation for Existing Roofs

Air Sealing and Compartmentalization in Multifamily Buildings

Air Sealing and Insulating Ceilings in Vented Attics

Air Sealing Attached Garage

Air Sealing Attic Access Panels/Doors/Stairs

Air Sealing Bathroom and Kitchen Exhaust Fans

Air Sealing Drywall to Top Plate

Air Sealing Duct and Flue Shafts

Air Sealing Electrical Wiring

Air Sealing Light Tubes

Air Sealing Multifamily Party Walls

Air Sealing Plumbing and Piping

Air Sealing Recessed Light Fixtures Below Unconditioned Space

Air Sealing Structural Insulated Panel (SIP) Seams

Air Sealing, Insulating, and Venting Attics and Roofs to Reduce Heat Gain

Asphalt Shingle Roofs

Attic Air Sealing, Insulating, and Ventilating for Ice Dam Prevention

Attic Eave Minimum Insulation

Attic Knee Walls

Attic Radiant Barriers

Attic Ventilation Fans

Batt Insulation for Existing Vented Attics

Below Deck Spray Foam Insulation for Existing Roofs

Blown Insulation for Existing Vented Attic

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Roofs & Attics