This 3mm depth Underlay is especially designed and developed for use with all floors (Wood, Vinyl and Laminate) that have Underfloor Heating. (NB please refer to Manufacturers Underfloor Heating System Instructions for usage). This Underlay has a self-seal lip which creates a Moisture Barrier (DPM). The structure of the cell foam encourages good Impact Sound Reduction- 19dB Compression strength > 100kpa/m.