By laying insulation material between the floor and the Accolade electric underfloor heating mats, the heat generated by the system is forced upwards through the floor covering. This ensures the rooms ambient temperature is reached quicker and more efficiently, thus reducing the systems “on” time, and provides considerable savings on energy costs.

Accolade’s flexible insulation

Accolade’s flexible insulation is 6mm thick and constructed from polyethylene foam. The cross-linked, closed-cell structure provides excellent physical and mechanical characteristics and is ideal for insulating floors where carpet, laminate, wood or engineered board will be laid above the electric underfloor heating system.Flexible insulation can be laid onto the base floor "floating" (not secured to the base) or held in place by tape, staples or glue. Flexible insulation is supplied in rolls 10m2 (1.5m x 6.66m) or 20m2 (1.5m x 13.33m) long.

Accolade’s Solid board insulation

Accolade’s Solid board insulation is 10mm thick and is supplied in boards 1250mm x 600mm (0.75m2). Made from extruded polystyrene it is ideal for insulating floors where ceramic, slate, stone, marble, etc will be laid above the electric underfloor heating system. Solid board insulation must be secured to the base floor using a flexible tile adhesive and should be spread evenly across the boards/base to give a rigid and secure surface upon which the heat mats can be laid. A high mechanical strength to weight ratio gives excellent spanning capabilities and can support weights of 30 tonnes per m2.


Accolade’s insulation materials are supplied with the express purpose of:

  •     Deflecting any heat generated by the UFH system upwards into the room.
  •     Improving heat up times of the system.
  •     Reducing the power required to achieve a given temperature.
  •     Affording protection to the heat mat from objects such as nails, screw heads etc.
  •     Maintaining the manufacturers warranty through compliance with the recommended method of installation.

They do not have the technical capacity to act as a substrate to eliminate any “bounce” in a floor and are not intended as such.