ARDEX UD 150 is a thin, mesh-reinforced plastic drainage mat for use under directly adhered tiled surfaces. A 6mm drainage channel allows the free passage of water underneath the tiled surface which speeds up drying after rainfall and reduces the likelihood of efflorescence build-up. ARDEX UD 150 is loose-laid over the membrane which separates the tiled surface from any movement in the substrate. In addition to its drainage capabilities, ARDEX UD 150 is ideal for soundproofing – providing up to a 16dB improvement in sound reduction.