Air Sealing and Insulating Ceilings Description Guide describing how to air seal and insulate a ceiling.
Dropped Ceiling/Soffit Below Unconditioned Attic Description Guide describing how to insulate and air seal dropped ceilings and soffits to prevent air leakage.
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.