Winter Mildew Prevention in Cold Northern Climes

donn0128 wrote:
Mold needs moisture. Are you sure you don't have a leak?

This could be the issue we had. Found half the floor rotted out and soggy early last year, replaced the floor in the fall. No mildew this past winter.

So now which is best, vents open or closed? Heated to just above freezing or not? Chemical dehumidifier or not? Remember, this is for areas that have prolonged freezes.