Tiling A Floor With Underfloor Heating

The layout of the underfloor heating loops should take into account installations that involve penetrating the floors.

Tiling a floor with underfloor heating. Weberfloor flex with low dus. Porcelain tiles were laid onto the screed using a proper adhesive spreader. I have a kitchen extension with wet underfloor heating encased in screed. When the tiles had been laid the ufh malfunctioned and switched.

For floors subject to thermal changes such as under floor heating floor area should be divided up by movement joints into bays of size not greater than 25m2 with and edge length of not greater than 5m. Tiling with underfloor heating or under tile warming underfloor heating can cause an array of issues if not tiled onto correctly from cracking due to heat expansion to damaging wires with a trowel. The underfloor heating design should be provided by the first fix stage. When advising on retrofit underfloor heating systems there is a continual trade off of parameters on the one hand there is a requirement to keep the system as slim as possible to minimise loss of floor to ceiling height.

Once tiling commences movement joints should be incorporated to coincide those in the screed. Have the heating on at a cutback temperature whilst tiling this means a floor temperature of max 15 o c. A retro fit underfloor heating system answering all of the challenges. There are two solutions for this problem one for each electric underfloor heating and piped underfloor heating.

Once the tiling and grouting has been carried out the temperature must remain the same for a minimum of 7 days. Maximum temperature of the floor surface bs en1264 2 1 limits the maximum temperature of the floor surface to 29 c or 27 c where floor tiling is proposed. Weber s highly polymer modified adhesives and grouts have enough flexibility when set to accommodate thermally induced movement.