Below Deck Spray Foam Insulation for Existing Roofs Description Guide describing how to add spray foam insulation to the underside of the existing roof deck as part of the conversion of a vented attic to an unvented, insulated attic.
Existing HVAC System Upgrade or Expansion Description Guide describing how to upgrade or expand an existing HVAC system.
Ventilation Air Inlet Locations Description Guide describing how to install ventilation air inlets in open locations at a safe distance from potential air contamination sources.