Tiled floor

[ChrisRoberts]

I've just created a new shower room down stairs. The floor is green chip board. With a marley floor drain in it. I have covered the floor with floor tiles and sealed the wall tiles to the floor with a good quality silicon. Shower worked great, stuart turner 4 bar pump to 2 ceiling roses and 4 body jets.
So far you wondering why is he telling me this?
Well I used a BAL micro flexible waterproof swimming pool grout on the floor. This it turns out is neither flexible or waterproof. I know this because after using the shower twice the floor tiles have lifted. Upon inspecting the floor I found the grout had cracked. Thus allowing some of the deluge of water to leak under the tiles and lift them.
So my question is. Has anyone got any recomendations on a flexible waterproof grout?
Oh I didn't add any flexible stuff to the mix. Should I try that in with the flexible grout?
Someone help me please. Me Mrs is doing her nut. I need to get it finished. Thanks in advance. Chris.

 

[gcol]

Am i reading this right? You've made a wet room by tiling over chipboard?
Have a look at this http://www.wetroom.info/acatalog/Aquaproof.html

 

[ChrisRoberts]

Ok I've realised the error of my ways. I'm going to rip up the chipboard (&tiles)and concrete the area. Do I still need to use the rubber stuff on the floor? Or will swimming pool grout be ok?

 

[Jasonb]

You still need to tank it.

"waterproof" when talking about grout means that it will not be damaged by water it does not mean it provides a water resistant barrier.

You should also tank the walls or at the very least turn the floor tanking 300mm up the wall.

Jason

 

[ChrisRoberts]

Ok. So here's my new plan. ( I knew I shouldn't have started working at home.) I'm ripping up the floor. Lowering the whole thing by about 150mm. Fitting a sanishower pwaste pump. Taking the bottom row of tiles. Putting in a new concrete floor. Tanking the new floor and at least 300mm up the walls. Tiling the floor. Then the bottom row of tiles. Any recomendations as to the floor adhesive to use? and which grout? I have BAL swimming pool flexi stuff at the moment. Thanks guys. CHris

 

[Jasonb]

Bal Single part flexible floor tile adhesive, Bal Whitestar wall tile adhesive, Bal Microflex wall grout, Bal Microflex widejoint Floor Grout.

Have a look half way through this pdf for the exact order to do it in

http://www.bal-adhesives.co.uk/bal/main/pdfs/fixing_guide.pdf

And allow the concrete to dry for 6wks before tanking.

Jason