Convective looping in fiberglass batts?
A big knock against fiberglass batts is that even when a building exterior is well sealed and the batts are installed correctly there can still be additional heat loss due to convection within the building cavity. I usually hear this called ‘convective looping’. I have heard this a few times as a justification for using spray foam, cellulose or BIBS. Does anyone know of any impartial research done into this phenomenon? Is it actually a significant form of heat loss in wall assemblies with fiberglass batts?