tiling onto flexible wood floor. Advice please!

[dean.diy]

Evening gents. Interesting thread. Flexible addy is best here but it
dont harm checking out user profile.

 

[les]

Okay, agreed I messed up. Was the ply thick enough ? Should I have primed it, and what with ? What adhesive ? And what grout.?
As for blaming it on the child, you might change your mind a little if you saw the rest of the house. Holes in the kitchen floor tiles. wallpaper pulled off. holes in the plasterwork and doors. A six year old kitchen with all the doors refixed at least 3 times, none of them close, all the hinges are bent and broken. The worktops and cupboards all warped and half rotten. There is nothing in the house that is not bashed broken and in most cases, saturated. The only thing he really likes is playing with water. His obsession with that has got worse since the bathroom was done in june.
So, apart from a properly constructed and preferably ground floor wetroom, what would have held up ?

 

[Gazzer]

You say you screwed the ply? At what centres and what size screw. Did you prime back and sides of ply ?
Ready mixed adhesive and your friend tiling to very high standards ??? Ok that’s a joke …right ?
As for the child being blamed…get real, while he may be responsible for the doors etc , he can in no way be blamed for the floor……floors are tiled and have cars parked on them with no issues.

 

[afright]

The kid would do more damage to himself than the floor if it was laid correct.

 

[EverDon Tiling]

Ready mixed adhesive and it lasted 6 months I'm impressed.

 

[les]

Okay, finally got hold of Darren, as he did the actual tiling. Adhesive was flexible latex stuff from either Wickes or Topps, grout was Bal. It was not a solid bed but done with a notched spreader.
Only things we definitely did wrong was not screwing into the joists, just the boards, don't know the centres but quite a lot of screws, and, maybe the problem, we did not prime the wood.
Darren is much more experienced than me, which was why I got him in, he has tiled plenty of floors and this is his first problem, so, again, any advice please. ( apart from stop doing bathrooms )

 

[EverDon Tiling]

The way i would of done is would have been to pull the floor boards up put extra noggins in laid 18mm wpb ply sealed on all sides including edges screwed in to joists ond noggins then 6mm hardibacker glued and screwed and then tiled with powdered flexible adhesive and flexible grout.

 

[les]

Thanks Everdon. I thought we had done it well enough, but there must have been just enough movement in the floor to allow the grout to crack ( it went first, starting a couple of months after we finished ) That allowed water in, as it was not primed that must have allowed the adhesive to lift. Thats all I can think of, although with some posters saying 6mm ply was ok, I'm surprised that 18mm Far Eastern Ply was still not enough.