Air Sealing Sill Plates Description Guide describing how to air seal sill plates in new and existing homes.
Spray Foam Interior Insulation for Existing Foundation Walls Description Guide describing how to insulate an existing foundation wall by adding spray foam insulation to the interior side of the wall.
Water Managed Existing Sill Beams and Sill Plates Description Guide describing how to insulate the sill beam or sill plate on the exterior side in a way that allows drying to the exterior, as part of an exterior wall upgrade.