Advanced Framing: Insulated Headers Description Guide describing how to insulate headers over doors and windows to reduce heat loss and heat gain through solid wood framing.
Advanced Framing: Minimal Framing at Doors and Windows Description Guide describing how to minimize framing around doors and windows to reduce heat losses and gains through structural framing.
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.