Video describing roof and attic construction for cold climates, including cathedral roof design and insulation strategies, from Cold Climate Housing Research Center.
Video describing various ways to bring HVAC ducts installed in an attic within the thermal envelope of the home by insulating the attic or by covering the ducts with spray foam and burying them in fibrous insulation.
Video describing attic ventilation methods for wind and water-resistant roofs to comply with FLASH Strong Home guidelines and improve hurricane resitance.
Video from Cold Climate Housing Research Center on how warm air typically leaks out of homes through attics via the stack effect and how to mitigate these effects through building practices.