Thor Forums

[JoeDS]

While checking on a AC duct flow problem I removed the inside ceiling AC cover to be sure there was no obstructions in the "ducts".


I say "ducts" because there aren't really any ducts, just open channels in the Styrofoam ceiling insulation (now I know while some brands advertise they have real insulated sealed duct in the ceiling). While there I noticed their was no caulking or sealer to prevent the forced air to blow in the roof cavity.


Your opinions on this:
Might it be good to pressurize the cavity between the outer roof and the inner ceiling with air to help it to be less prone to moisture entrapment?

Or is it likely to allow moisture to "get" trapped in this area.


I can kinda see arguments for either approach. Maybe good in summer but bad in winter?!?!?!