Is there anyone that thinks that a radiant barrier can work without an air gap?
Could you please explain what is wrong about this video.
What this video explains
Low-E is a type of radiant heat barrier?
Radiant heat requires an air gap
Emissivity also requires an air gap
Without an air gap, you have conductive heat transfer.
Conductive heat is when 2 materials touch each other
and so heat is transferred.
Demo - Why it will not work under shingles