Vented ceiling: dense-packed cellulose vs. Spider or Optima
I have read the "how to build a cathedral ceiling" several times, but am still confused on details for air gap/dense pack system.
In the case of building a VENTED cathedral ceiling which is dense packed with small particle fiberglass or cellulose, Should there be a air barrier on the top side ( air gap side) of the insulation? The way I understood some of the posts on this topic, the baffle vent must be air tight for some types of insulation, and not for others. Can someone clarify?
If the loose fill insul is dense packed (1.8 Spider/3.5 cellulose) is that enough of an air barrier that I do not have to worry about topside air barrier.
Posted Tue, 10/29/2013 - 11:44
Edited Tue, 10/29/2013 - 12:24
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