Batt Insulation for Existing Vented Attics Description Guide describing how to increase insulation in existing homes by installing batt insulation on the ceiling plane of a vented attic.
Install Top Plates or Blocking at the Top of Walls Adjoining Unconditioned Spaces Description Guide describing how to correctly air-seal a wall with missing top plates or open wall cavities.
Ducts in Dropped Ceilings Description Guide describing method for installing ducts in a duct chase above a dropped ceiling.