08-07-2008, 06:57 PM
Is your basement heated or not? If heated why insulate it at all? Hot air rises, cool doesn't so both would seem to work to your advantage with an un insulated ceiling in a basement that's heated.
OTOH if the basement isn't heated then you'll want to use a faced insulation with the kraft paper toward the upper floor and the insulation facing the unheated basement.
Either heated or unheated I don't think I'd even consider using plastic. With a heated basement the plastic would serve no purpose except to inhibit the warm air moving up to some minor degree. In an unheated basement putting up plastic could conceivably trap the warm air filtering down from above and the cold air rising from below could potentially cause condensation which in turn could cause mold, mildew, rot or what have you.
My 2ยข
OTOH if the basement isn't heated then you'll want to use a faced insulation with the kraft paper toward the upper floor and the insulation facing the unheated basement.
Either heated or unheated I don't think I'd even consider using plastic. With a heated basement the plastic would serve no purpose except to inhibit the warm air moving up to some minor degree. In an unheated basement putting up plastic could conceivably trap the warm air filtering down from above and the cold air rising from below could potentially cause condensation which in turn could cause mold, mildew, rot or what have you.
My 2ยข