Quote:
Originally Posted by aleatoric  I am also wondering the importance of having an "air gap" and if filling an
air gap with more 703 is preferred over leaving the space/air. |
I have yet to hear anyone say that, for a given total thickness, it would be
better to have less insulation plus an air gap than to have just insulation filling
the total thickness.
I believe using an air gap let's you save on insulation, but not on total thickness.
Here is some info on the matter :
Effect of airspace behind absorbent
(click on "Page 191 ยป" to expand the view)
Paul P