Spray Foam Insulation Applied to Existing Attic Floor Description Guide describing how to apply spray foam insulation to ceilings in existing homes.
Air Sealing Recessed Light Fixtures Below Unconditioned Space Description Guide describing how to air-seal around recessed light fixtures below unconditioned space.
Dropped Ceiling/Soffit Below Unconditioned Attic Description Guide describing how to insulate and air-seal dropped ceilings and soffits to prevent air leakage.