Old house, traditional pine floorboards, 6mm ply, plus Ditra

[Busybee1]

I have no idea whitebeam. I just remember seeing the heads and noticing they were not screws.

 

[Dan]

Screws or nails?

Nails will pop back up in no time as it swells.

Screws you might have a fighting chance. But it really needs to be replaced with an actual tile backer board.

 

[Dan]

We posted at the same time there. So 100% not screws then. Not good news at all. Ring Schluter or the adhesive firm and get confirmation that their guarantees are now void and then find an actual wall and floor tiler not a bob the builder and get it done properly.

 

[White Room]

I can't believe nails are being used and 6mm ply, your best bet is probably leave it and if at a later date it shows problems then contact the tiler.

 

[Dan]

Damn it I've just read it's complete! I missed that.

Keep in touch with the tiler.

What made you come on the forum now?

 

[Time's Ran Out]

It sounds as though they have tried to do it correctly apart from the nails but only if the wooden section was deflection free.
The Ditra is an excellent product and used correctly, taped and adhered with the appropriate products will be fine.
They've taken the Ditra across the 2 substrates wood/concrete and used it as an anti crack membrane which may be ok, although the expansion joint should have been taken through to the tile surface! This can look unsightly but you should make sure to retain enough tiles to replace this area if it cracks in the future.
Without seeing the job it would be wrong to lamblast their work and other issues like heights etc may have been involved.

 

[Stef]

I'd using a decoupling membrane with trav on any floor...

I just saw it was travertine.
Yeah I would have used some form of decoupler..

 

[Stef]

I can't believe nails are being used and 6mm ply, your best bet is probably leave it and if at a later date it shows problems then contact the tiler.

They have probably used ring shank nails at that thickness of ply so it might hold.
Sounds like they have used af200 to fix the Ditra so that should stick well to the ply.
The Ditra is the saving grace here, if the ply doesn't debond then hopefully the tiles will be fine but only time will tell.