Laid up my 42'
sloop periodically for several months over a total of 11 years in the
Eastern Caribbean. Never had a
mold or
odor problem.
Boat has 3 cowl vents and vented louvered main
hatch doors.
Air circulation is the key. And, it's a misconception that just because
boats are in the
water their
interior is necessarily damp. That's just not so. I found in 17 years as a
liveaboard that dampness was rarely if ever a problem, though dryness was.
Bill