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Guide describing how to insulate a basement to improve the overall thermal performance of the building and provide more dry, usable conditioned space for home occupants and HVAC equipment.

This guide describes how to install a rigid air barrier to walls behind showers and tubs.

Guide describing insulation techniques for skylight shaft walls.

Guide describing how to insulate a floor overhang (or cantilever) on an existing home by adding insulation and an air barrier to air seal the floor joist bays under the cantilever.

Guide describing how to insulate and air seal the floor joists over a garage when there is loving space above the garage.

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 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 sill plates in single-family homes and multifamily buildings.

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

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

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

Guide describing how to air-seal doors that are next to unconditioned spaces.

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

Guide describing how to air-seal the rough openings around doors and windows.

Guide describing how to air-seal around light tubes.