How do I prepare/level an uneven wooden floor for laying ceramic tiles?

[Peter]

I live in an old house with floorboards that are pretty uneven.

For the small bathroom (1.7 x 2.12m) bathroom I want to lay ceramic floor tiles but am concerned that they may look unsightly on the uneven surface, and maybe even crack when they are stood on.

I don't really want to lay a thick false floor underneath as it will make a 'step' into the room. Can anyone advise on the options available to me please.

Tim

[stuart noble]

Take floorboards up, replace with ply?

[dg]

Any sort of tiling or lino should not be laid directly on to floorboards, but a layer of 4mm hardboard or 6mm plyboard should be fitted first to give an even base.

dg