I ‘m noting mold on the wood siding of my 1 year old CT house. I noticed it shortly after moving in, and seems to be getting worse over time. It is mostly on the south side of the house. Close up it is small dots – lots and lots of them – but from afar looks like grey blotchs across large areas of the siding. The siding was front and back primed before installation then painted. Any idea what is causing this and how to get rid of it. I don’t want to repaint only to find the mold retuning.