Using attic joists as ceiling service cavity
Once again, my Googling has come up short. Has anyone discussed adding a deck (osb or plywood) to a truss built attic on top of the joists, then adding all the insulation on top of that?
In this way the space between the ceiling and the deck could be used as a service cavity without lowering the ceiling. Given that it would be part of the conditioned space, duct work could be run in there for connecting HRV venting in the bathrooms.
Would the air sealing around all the truss connections be too tricky? Or risky?
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