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Guide describing how to insulate an existing slab floor by adding rigid foam insulation over the slab then installing a floating subfloor.

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

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

Guide describing methods of installing blown insulation in exterior wall cavities of existing homes with minimal disruption to occupants.

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 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 new foundation wall or an existing foundation wall by adding rigid insulation to the exterior side.

Guide describing how to install and properly integrate flashing at the intersection of the wall and roof on an existing home.

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

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.

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

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

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

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

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.