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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 how to insulate the wall cavities of an existing home with spray foam.

Guide describing how to install spray foam on the exterior of the existing home after framing over the existing siding.

Guide describing how to install continuous air barriers in exterior walls.

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

Guide describing how to apply flashing to the bottom of exterior walls to create a continuous drainage plane.

Guide describing how to install slab edge insulation when retrofitting existing slab-on-grade foundations.

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

Guide describing how to insulate an existing foundation wall by adding spray foam insulation to the interior side of the wall.

Guide describing how to upgrade walls that separate the garage from the house by providing a continuous air control layer on the garage side of the wall and adding rigid foam insulation.

Guide describing how to insulate closed crawlspace walls and band joist areas with rigid foam board insulation.

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 separate the porch attic from the conditioned space.

Guide describing how to insulate plumbing pipes.

Guide describing continuous rigid insulation installation procedures to reduce thermal bridging and help provide thermal protection.

Guide describing how to install low-emissivity exterior storm windows.

Guide describing insulation techniques for skylight shaft walls.

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 method for insulating an unvented crawlspace or conditioned basement with rigid foam on the interior side of the walls.

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 install flashing that is integrated with air and water control layers around piping, vents, and other wall penetrations as part of an exterior wall retrofit.

Guide describing principles of insulating and air sealing band joists as a stand alone energy upgrade, or as part of creating a closed crawlspace.

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 attic knee walls and floor joist cavities under knee walls.

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

Guide describing different options for providing seismic and thermal resistance for homes with basement foundations, crawlspace foundations, or crawlspace foundations with a "cripple" wall.

Guide describing how to upgrade a crawlspace floor in an existing home by adding insulation.

Guide describing the design and installation considerations for recladding of above grade walls using insulated vinyl siding.