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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 how to re-roof an existing home with a sloped roof and add insulation above the roof deck.

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

Guide describing methods for insulating an unvented attic along the roof line.

Guide describing a method for insulating an unvented attic by spraying foam insulation along the underside of the roof deck.