Toughsheet Toughsheet Damp Proof Membrane - Black | 4m x 25m / 300 micronsCommonly used to protect a building's concrete slab from moisture rising from the foundations. A damp proof membrane or DPM is a versatile product and can also be used for a wide range of applications such as creating a protective surface before laying laminate or wood floors. Toughsheet Damp Proof Membrane Black 4m x 25m 300 microns Made from 100% recycled materials BBA certified Length metre 25 Width metre 4 Thickness gauge 1200 Thickness microns