Here is the issue, my basement wall facing south is trapping moisture. Removed the drywall and found a layer of poly and rigid insulation on the lower wall and batting insulation on the top side. The 2x4 framing studs are built above the footing blocks but on the inside they put 1x6 furring strips and drywall over that The exterior brick wall under the window shows efflorescence. Btw, my footing is above grade. Would this have been caused by water/moisture from the exterior brick wall/ window or internally from the vapor barrier? I've read too much information about basement wall insulation and some say to insulate it some say don't.
any help or information greatly appreciated.