FAQ

Here are the most frequently asked questions about OPAL SYSTEMS floor heating and the answers.

WHAT TYPE OF UNDERLAY SHOULD BE PROVIDED?

OPAL SYSTEMS floor heating must be installed on a SOUND, FLAT, STABLE AND INSULATED support.

This can be on screed, on wood (OSB) support, old tile, old parquet, dry screed, etc.

On the other hand, OPAL SYSTEMS does not need to be installed on a floor screed, which makes it possible to gain several centimetres in height, tens of kilograms per square metre, as well as the cost resulting from this type of screed and time lost due to drying.

SHOULD OPAL SYSTEMS FLOOR HEATING ALSO BE INSTALLED BENEATH BATHTUBS OR CABINETS?

No, if they cover the floor, heat cannot be emitted to heat the room.

Unheated areas can be covered by panels or gridwork (with no diffuser or tubing) in order to obtain a continuous level for laying the final floor covering.

WHAT HEIGHT DOES OPAL SYSTEMS NEED FOR INSTALLATION?

The minimum total space needed for the OPAL SYSTEMS floor heating system and the gluing of the final flooring (if it is glued) is ~22 mm.

For safety, it is best to provide a reserve of ~25 mm, which will allow for possible leveling errors and errors of thickness and flatness of the final flooring.

The thicknesses of the final flooring and insulation must be added to this number.

DOES OPAL SYSTEMS GAIN SPACE?

Yes, like all floor heating systems, the possibility of not having to install radiators on the walls or in front of windows will allow a gain of up to 5% of living space. Its thickness of 20 mm will allow you to consider installing it where the lack of height has usually made conventional floor heating impossible.

CAN OPAL SYSTEMS FLOOR HEATING BE INSTALLED DIRECTLY ON A SPRAYED LAYER OF POLYURETHANE?

Even after leveling, the flatness of a layer of sprayed polyurethane will not be good enough to allow the direct installation of the OPAL SYSTEMS floor heating system. A leveling layer or bed (~15 mm of fibrous Ecolene) should be poured first on the sprayed polyurethane to ensure that it is flat, horizontal and level.

The OPAL system must be installed on a flat, stable and insulated support.

DO SPECIFIC EXPANSION JOINTS HAVE TO BE PROVIDED?

Lower expansion joints are unnecessary because there is no covering screed and the Opal system is detached.

The rules for laying the final covering must be followed.

CAN OPAL SYSTEMS BE INSTALLED IN COMBINATION WITH AN OLD INSTALLATION SUCH AS RADIATORS?

Yes, your heating technician will be able to advise you about the specific regulation of two types of heating operating at different temperatures.

WHAT IS OPAL SYSTEMS?

OPAL SYSTEMS is a floor heating system that is innovative because of its low inertia and because it is simple and quick to install. It was developed in partnership with the University of Liege in Belgium (ULg).

The principal advantages of the system are:

  • Its unique reactivity to rising or falling temperature
  • Its simplicity of installation
  • Its thinness
  • Its lightness, which allows it to be installed during renovation work
  • Its economy due to the lower water temperature needed