Black Brown and Lime Green on Cinder Block wall


Old 07-23-19, 12:25 PM
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Join Date: Jun 2013
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Black Brown and Lime Green on Cinder Block wall

I'm afraid to ask what this is. I am really hoping it is not black mold.
It is on only 1 wall (an outside wall) in a small room in the basement. The other 3 walls are fine. Inside the room is the central air conditioning unit. The room itself is usually cool but not really damp. I can take a macro picture if necessary. It looks to me like rust and dirt. But maybe I am just too hopeful. The lime green I am guessing may be a previous color paint. I have never found any water leaks in that room, in the 6.5 years I have been living here.
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