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

Guide describing buried ducts in loose-fill attic insulation, a method that can only be used in dry climates.

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 approaches to burying and encapsulating ducts in unconditioned attics to increase the overall R-value of duct insulation.

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 apply spray foam insulation to ceilings 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 re-roof an existing home with a sloped and add insulation above the roof deck.

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

Guide describing options for designing and locating the thermal boundary at either the attic floor or along the roof line in new and existing homes.

Guide describing wind washing and how to prevent it.

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

Guide that illustrates how and when to encapsulate ductwork in unconditioned attics, increases the R-value of duct insulation, mitigating condensation issues and reducing air leakage.