Speed Screed supply and install a number of systems using polythene membranes, with slip membranes from 500 gauge to Damp Proof Membranes at 1200 gauge and above. The 500G membrane performs as a separating layer rather than keeping moisture out, whereas the 1200G (and above) membranes ensure that no moisture is made available to the screed and floor coverings. We also supply a liquid damp proof membrane for moist substrates and where program dictates a solution is required to lay the floor coverings. Radon barriers can also be installed to prevent Radon entering the building by airflow. Call us to discuss your requirements.