Tips on how to deal with mold & mildew

[Les C]

Something that we heard (I think from the picture framer at the Hilo Ironworks bldg.) that framed artwork hung on outside walls ("backed up" to the outdoors) will be more subject to condensation, and, by association, mold/mildew. I don't know if double- or single-wall construction makes a difference. We haven't tested this out to see if it's true or not. Has anyone heard this, too, or found it to be true?