Quick grout query

[Part-Time Tiler]

I am tiling over UFH and want to know if there is a special grout required to do this or can I get away with normal grout. Want to avoid cracks later obviously.

 

[DHTiling]

Needs to be flexible......

 

[Gazzer]

Flexible grout mate.

 

[CJ]

As above :20:

 

[inspiredandy]

i would use bal wide joint with gt1 as superflex does not always give enough flexibility.
Other makes are available (dont wanna appear biast)

 

[White Room]

Or Mapei

 

[doug boardley]

flexi deffo not normal

 

[Part-Time Tiler]

Thanks for the replies eveyone. Flexi it is then.