Laying onto chipboard?

[tilerfil]

Went to look at a kitchen that needs tiling and the customers carpenter has laid 18mm t&g chipboard (green stuff) onto existing floor boards fixed at about 300mm centres from what I saw, as the whole floor needed raising to level of conservatory.

Floor seems solid and the customer was told by the chippy that this was sufficient to tile onto. Never tiled onto this before myself, always been wbp ply. Is this possible? In the heat of the moment told the customer it was ok to tile onto, however, having second thoughts.

Apart from priming the face of the chipboard, would any thing else differ than if tiling onto ply?

Cheers in advance for any advice.

 

[DHTiling]

Chipboard IMHO isn't stable enough alone to tile too...You will be better using an un-coupling membrane..something like Dural Ci...then tile..especially in a conservatory with all that thermal expansion.

 

[tilerfil]

Thought that may be the case. Although the conservatory is concrete and its the kitchen that is chipboard.

Will take your advice cheers.

 

[DHTiling]

Thought that may be the case. Although the conservatory is concrete and its the kitchen that is chipboard.

Will take your advice cheers.

Would still do the same...on chipboard...unless you can get away with a 6mm increase and use hardibacker 250....