Anyone do any experimenting with how big of an air gap you need between the exterior surface and a radiant barrier before the effectiveness doesn’t improve?
I’ve read time and time again that you need a minimum of a 1/2” air gap. Do you see any significant difference at a 1 inch air gap, vs a 2 inch air gap etc. etc.?
I’ve read time and time again that you need a minimum of a 1/2” air gap. Do you see any significant difference at a 1 inch air gap, vs a 2 inch air gap etc. etc.?