Halo’s Interra is another stellar candidate. Its panels come sealed with a laminate that effectively chokes off all air AND vapor flow. With Interra, you get an air and vapor barrier, and insulation, in a single product. Keep in mind, though, that any air barrier, Interra included, must be taped at its seams and sealed around the edges and penetrations to work well.
A quality air barrier should also be durable and robust enough to withstand the effects of construction activities and other forces that may disturb it in the building’s lifetime. Interra’s integral air barrier is bonded to a GPS foam board. With a compressive strength of 10 PSI, the foam core provides the air barrier with a sturdiness that house wrap and poly vapor barrier lack on their own.