A damp-proof membrane (DPM)
[2] is a barrier through the structure designed to prevent moisture rising by capillary action such as through a phenomenon known as rising damp.
Rising damp is the effect of water rising from the ground into property
.[3] The damp proof membrane may be horizontal or vertical.[
4] A DPM layer is usually laid below all masonry walls, regardless of if the wall is a load bearing wall or a partition wall.
300 microns