Tiling Over Floor Tiles With Underfloor Heating

Tiling onto floors with underfloor heating warm water systems 5th february 2016.

Tiling over floor tiles with underfloor heating. A concrete substrate b dpm c insulation d heating pipes e screeds f prime appropriately for the type of screed used g apply adhesive selected upon tile type h install tiles i grout all joints. If you have the height you could tile over the top its not ideal and will make the heating less efficient but it would work if the current tiles are solid tpt 16. Spreading of adhesive should be done with a plastic rather than metal trowel to avoid nicking the cable. Replacing floor tiles over wet underfloor heating.

For floors subject to thermal changes such as under floor heating floor areas should be divided up by movement joints into bays of size not greater than 40m2 with and edge length of not greater than 8m. Diyisfun 5 sep 2013 in forum. It would be possible to tile over the existing tiles without affecting the output too much if you are using tiles with good thermal conductivity however most tiles are ceramic which is more of an insulator. 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.

When fixing floor tiles over electric under floor heating flexible adhesive and grout should be used as they will absorb the minute changes in movement which occurs as the underfloor heating heats and cools. If tiles have already been installed over underfloor heating it would be risky to attempt to remove them because you could potentially damage the underfloor heating system underneath. There are two solutions for this problem one for each electric underfloor heating and piped underfloor heating.