20m2 or 40m2 Options Provides a surface that is totally separated from damp in the floor Made from 100% recycled HDPE Provides vapour control and, when used with humidity control systems and is capable of delivering an environment to all levels within a Grade 3 environment to BS 8102:2009 Resistant to rot, chemically aggressive groundwater, acids and alkalines, efflorescing salts and hydrocarbon contamination, Weight: 22.0462262 Pounds, Manufacturer: Structural Supplies Online