@longshanks @Nesano @sickburnbro Youre still supposed to cover it with siding or something else, but it's coated with waterproofing and sometimes fiberglass reinforced in the panel itself. Fireproofing because it's gypsum, and you can butt it up to other pieces directly since there's no swelling (hopefully). People are lazy and cheap though, and I wouldn't be surprised if it's plopped right down and coated with ceramic paint.