A topic to discuss all things insulation including, pliable membranes (reflective foil barriers), Vapour barriers (class 1 or 2) which control moisture, Water control membranes that resist liquid water, Air control layers that limit air flow, Thermal wraps for insulation, bulk insulation, foam insulation, passive home, air sealing, thermal bridging, thermal mass, thermal breaks, thermal transmittance, bulk insulation (batts of all types).