Haven’t been liking all I’ve read recently about condensation and styrofoam insulation. Have an attached carriage barn we’re looking to convert the second floor into a workshop for DWs business. It’s approx’ly 200yrs old, and if possible I’d like to keep as much of the framing exposed as possible.
Post and beam (approx 9x9s), in ~9ft bays (?), with ~6×6 rafters in between pegged into a 3/4 round ridgepole. Hoping to be able to keep the rafters exposed. Live in southern NH and code is for r-30 or r-38 in ceilings. We do get winter here, so whatever heat we go with is bound to generate some condensation. But I’m concerned with all the messages that have been posted as to how tough a problem this is.
Re-roofed about 5 years ago, so not looking to strip that off and lay down sleepers to generate an airspace.
The spacing seems a little tight to me for 4″ of the r-8/in isocyan…..whatever it is, and that may not even be enough insulation, but again, from all these messages I’ve read I know I don’t want to intentionally introduce condensation into this area.
Thoughts?
Rick