Warmup Insulated Underlay is a thin insulation barrier that reflects heat upwards, making the underfloor heating system more efficient & effective. It also reduces contact noise & the foil backing acts as an effective moisture barrier. Warmup insulated underlay has been specially developed for installation under Warmup dual overlay as part of a complete stable overlay system. It is the ideal duo for installation of soft & resilient floor coverings such as carpet, vinyl & linoleum, in combination with the Warmup foil heater. Thanks to the structural integrity & design of the Warmup Insulated Underlay, a heat resistance of as much as 0.19 (Rm value)is achieved. Features & benefits Resists heat loss & increases the efficiency of the underfloor heating system Extremely effective in reducing contact noise Very thin at only 6mm in depth Lightweight & easy to install Foil backing acts as a moisture barrier Recommended for use in combination with Warmup Dual Overlay, for best