Air Sealing Doors Adjacent to Unconditioned Space Description Guide describing how to air seal doors that are next to unconditioned spaces.
Rigid Foam Insulation for Existing Exterior Walls Description 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.
Vented versus Unvented Attic Description 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.