A damp proof membrane is a crucial component of any building construction project, acting as a barrier against moisture penetration from the ground or environment. Membranes are installed below concrete slabs or floors to prevent rising damp and water ingress. This protective layer is essential in preventing structural damage, mould growth, and degradation of building materials caused by excessive moisture exposure. DPM 300mu, BBA Approved products, CE marked Size available 4m x 25m Black