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What to do when Installing FOIL on a Concrete Slab ?

Warmup® Insulated Underlay is a thin insulation barrier that reflects heat upwards, making the underfloor heating system more efficient and 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® FOIL systems used to heat rooms under Laminates, floating wood floors, floating LVT floors and Carpet.

Thanks to the structural integrity and design of the Warmup® Insulated Underlay, heat resistance of as much as 0.19 (Rm value) is achieved.

  • Resists heat loss and increases the efficiency of the underfloor heating system.
  • Extremely effective in reducing contact noise.
  • Very thin at only 6mm in depth.
  • Lightweight and easy to install. 
  • Foil backing acts as a moisture barrier

Under Carpet: Use over or instead of the carpet pad in order to improve the heat reflection upwards.

Under Laminate/Engineered Hardwood: use directly on slabs with Warmup FOIL heaters over the underlayment. While not required, an 1/8”polystyrene foam can be applied over the FOIL heaters to improve plank leveling and noise canceling.


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