Rising damp or “salt-damp” happens over the bases of partitions. It moves upwards vertically since the damp proof course that all residences are equipped with is has failed or has become ‘bridged’ and is also not preventing moisture from rising. Some flooring planks have underlayment attached to The underside in https://rising-damp-sydney17925.blogoscience.com/35003083/sub-floor-ventilation-for-dummies