Can I tile directly over electric underfloor heating
Yes you can! When tiling over an electric underfloor heating element you must take care to use a full bed of adhesive for each tile. This ensures that all of the heating element is contained within the adhesive and the heat can dissipate from the cable into the floor and up into the room.
“Dot and dab” tiling techniques should never be used with electric underfloor heating as the air voids can cause the heating cable to overheat and fail.
The heating element and the connection to the cold tail should be totally covered in tile adhesive or self-levelling compound. This ensures the heat can radiate into the floor evenly creating a more comfortable room and a longer lasting electric underfloor heating system.
In most cases a tiler will be happy to tile directly over a Comfortzone electric underfloor heating system. Some tilers and flooring contractors do prefer to lay a thin bed of self-levelling compound over the electric underfloor heating element before tiling to protect the cable against any damage. This is best practise if the site is particularly busy, or if the electric underfloor heating is going to be left exposed for any extended length of time.
Any tile adhesive, grout or self-levelling compound should be flexible and suitable for use with electric underfloor heating
systems. Check the adhesive packaging or ask the manufacturer for confirmation if you are unsure.