The real cause of damp flooring is often hidden below. In Britain’s damp climate, moisture in the ground builds up under houses. If your Damp Proof Membrane (DPM) is damaged or absent, that water penetrates the concrete. Soon, your floors and rooms feel persistently cold and damp. https://www.damp2drysolutions.co.uk/blogs/how-to-damp-proof-concrete-floors-uk-guide/