The castellated underfloor heating system, designed for refurbishment projects where floor build up has restrictions. The system incorporates a 12mm heating pipe within a plastic castellated panel, which is then covered with 20mm of reinforced levelling compound.
The way that this system is designed means that it must be laid directly onto a structural and level subfloor, not onto any loose flooring or insulation layer. This can be a concrete sub floor or chipboard floor, but it must be a structural layer as the 20mm compound is not structural in its own right.
The systems heat response time is around 15-30 minutes (depending on the floor covering), very similar to the response time of a radiator.
We recommend the use of a fibre-reinforced levelling compound. Most floor finishes can be laid directly on top of the system.