Is ventilation required with Reflective Insulation?
No, but it is HIGHLY recommended, because ventilation addresses convective heat transfer. Good ventilation is also important for controlling condensation, especially in metal buildings and agricultural structures. If an attic system contains mass insulation (such as cellulose or fiberglass), a Radiant Barrier and a ridge vent, that attic system effectively addresses all three types of heat flowConduction, Radiation, and Convection.
