Advanced Framing: Insulated Corners Description Guide describing how to frame and insulate corners to reduce the heat loss and gain though structural framing.
Ducts in Dropped Ceilings Description Guide describing method for installing ducts in a duct chase above a dropped ceiling.
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.
Insulation Below Attic Platforms Description Guide describing how to install insulation below attic platforms