I recently bought a condo and noticed that there was what appears to be a dark colored mold growing on this gypsum board that is bolted to the cement foundation in my basement. On the top of the gypsum board is fiberglass insulation that also has a blackish mold on it. This wall is adjacent to the outside back yard. A maintainer from the condo quickly inspected the area of stated that the cause may have been from a hose coming from the heat pump of my neighbors house because when their air conditioning is on, water is periodically coming out of the hose so therefore the condo association may not be liable. The Condo Association has already assumed liability in my case for when rain water seeps through my foundation and causes damage. They have already installed a water mitigation system in my basement and put in a sump pump. My question is, is it possible for a heat pump air conditioning unit to put out so much water that it would actually come into my basement above the foundation? I was also wondering, if my basement was properly sealed, would I even have to worry about water seepage problems to begin with?
Also, what would be the best way to go about cleaning this if the condo association refuses to fix it? It looks like the previous owners may have used bleach because the gypsum board was slightly discolored and I could see wipe marks in the blackish mold.
The previous owner did State on the disclosure that there were water seepage issues that the condo association has already assumed liability for before I bought the condo. My issue now is that a maintainer on behalf of the condo association came out and said that it the water coming into the basement is likely due to the air condition he pump next door draining water near my foundation therefore he's claiming that they may not be liable. I am going to add to pictures of the heat pump next door to me. I think either way they should be liable whether it's from rain or the heat pump.
Also, in the picture, the brownish hose is an extension that is connecting to the drainage hose coming from my neighbors house. The extension drainage hose frequently falls off so the water does drain within a few inches from my foundation when that extension to the hose falls off