grout crumbling

[rosieposie]

Hi folks looking for some advice - builder has laid 9mm porcelain tiles which I bought from B & Q. They are laid on a timber floor sheeted with 6mm ply. He used porcelain adhesive and normal grout. Well a week later and movement in the tiles on the floor is causing the grout to crumble. He is due back on Tuesday any advice. I gather he should have used flexible grout and adhesive and 18mm ply?

 

[Stef]

Theres your problem.

"The builder laid them"????

Builders build, Tilers Tile..

 

[cam_low]

BS states minimum 15mm, though there are better products out there ie hardie backer cement boards.
Which adhesive did he use ?
If you knock the tiles are there hollow spots ?

 

[Martyn Leeds]

Yep,
few clues here as to what went wrong.

Is the tiling part of a larger building project?
or just a tiling job?
Did the builder employ a Tiler?
or did the 'Builder' tile it himself?

 

[charlie1]

He maybe forgot to Pva the floor before tiling.... Hmmmm??

 

[rosieposie]

Thanks guys well he did PVA the floor and it is as part of a big project but it the tiles are laid on the original floor of the kitchen leading on to the extension. There are some hollow spots when knocking the tiles eek will the whole lot have to be lifted or is there an alternative?

 

[cam_low]

Sorry Rosie, Charlie was being sarcastic. This problem of yours is all too a regular occurance on here.

Tilers don't use pva these days. There are specific primers (acrylic) that are used to prep. It may sound as though he has dotndabbed the tiles also.

im guessing at a refit.bu a tiler who will guarantee their work.

 

[Martyn Leeds]

6mm ply - screwed ? or Nailed ? (not that it really matters by the way)
"Tiles are laid on the original floor" ??
Do you have any info re the products used for the adhesive & the grout?

also,
any pics??

 

[rosieposie]

Hi Martyn it was laid on 6mm ply which was screwed down he used Nicobond tilers grey grout and Sovereign one part flexible Porcelain adhesive. Pics wouldn't help I don't think.

 

[dave l and l]

i live near helensburgh if you are needing some advise,,, in fact i am working there later on this week

 

[cam_low]

What does the builder say about this ?

 

[rosieposie]

I am going to speak to him on Tuesday just wanted some advice!! I am sure he will sort it out just hoping the whole floor doesn't have to come up!

 

[cam_low]

Good luck with that.

 

[CJ]

As with a lot of tiling work carried out by builders.......

(click on link)

Orange Juice - Rip it Up (Official Video) (1983) - YouTube

 

[dave l and l]

the 6 mm ply is no good either is the pva.it doesnt sound good at all to be honest

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how big an area is it