To combat dampness and eliminate contamination in concrete floor applications there is<br>Delta-FM, a high density polyethylene sheet from Delta Membrane Systems.<br><br>The low stud profile of 3mm helps to minimise deviations in floor levels, but still provides an air gap to achieve damp pressure equalisation, Delta Membrane Systems says. A flange strip along one side of the roll allows jointing to be carried out with an overlap, but without affecting the overall height of the installation.<br><br>Quickly fitted to ensure minimal downtime for installers, the company says that Delta-FM ensures the percentage RH levels are isolated in the air gap and controlled.<br><br>Suitable for use in conjunction with thermal insulation, sound insulation and many types of underfloor heating systems, Delta-FM can be used in new build, remedial or refurbishment projects for floors and walls.<br><br>Compressive strength is 140kN/m2, and the void between the dimples is around 2.1 litres/m2.<br><br><a href="http://www.deltamembranes.com">www.deltamembranes.com</a>