Anyone have previous experience on subject matter? Balcony has considerable amount of wear and tear with concrete cancer from steel inside concrete.... Not sure how bad it is but probably unsafe and easy to fix for a builder of some sort. I have some pics I will try and download and wondering if this can be fixed via patching if some sort of builders can do this or it has to be fully replaced if dangerous for tenants. Looking for some experienced advice before tackling builders/trades for quotes and if it actually needs replaced in full?