Duct Insulation R Value in a Attic with a spray foam roof deck.
Definition of Conditioned Space – Spray foamed attic/roof deck
I am consulting on a new construction house for efficiency. We are spray foaming the entire house including the bottom of the roof deck. The HVAC installer finished his rough in. His duct work is wrapped with R6 insulation in the attic because he understood it was a “conditioned space”
The building inspector failed his rough in because he said the area was not directly conditioned with its own supply and return so the duct need to be R8.
What is your opinion and suggestions?
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