does rigidboard insulation next to drywall on an exposed beam ceiling require any air space to prevent condensation? | |
i recently had a licensed insulation contractor install 3" rigid board insulation (with foil on top and bottom)between the exposed beams of my master bedroom attaching the insulation via screws and washers to the tongue-and-groove wood ceilings (over which is composite shingle on the outside of the roof). a second vendor then covered the insulaton with drywall directly and then applied mud and then paint. i am somewhat concerned because i now hear very gentle intermittant sounds from time to time ostensibly from within the new drywalled ceiling which i take to be expansion and contraction of the insulation against the ood and wall board. however, upon investigation on the net i am now fearing that the vendors left no room for an air layer anywhere in the ceiling, and that what i hear may be some kind of incipient moisture action. is my fear justified? and if so, what can be done about it?
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