Aco drains are often installed to try and alleviate rising damp issues. What I normally find is that they actually cause more of a damp issue. These are normally installed up against a wall, that will allow water to run through open joints, and prevent evaporation at the base of the wall. Please the video below of a property that had damp issues because of these and also drain issues. I have plenty more like this on my YouTube channel.
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