Grout cracking on Bathroom floor

[gardian]

Hi all new to the site, I have had a search for grout cracking but did not turn up any results for me, so sorry if this question has been asked many times before

I have recently had my bathroom changed and we went for a slate look ceramic tile on the floor, this was put on half inch ply on top of the wooden floorboards that were originally down.
The joins were grouted with some "Sontex" (i think thats what it said) fromt he local builders yard. i bought it because of the colour not the brand name. Some of the lines in the groupt has cracked alreaady and it has only been down a week or so. i have even topped it up and it still cracked

Can anyone tell me if i have doine anything wrong? or what i can do or buy to stop this from happening again? do i need to change the brand of grout i am using? the grout is light grey which i like the colour of, just not the crackin

Also, (long first post or what??) I have used some Unibond antimould grout on the walls, woudl it be a good idea to seal this with a grout sealer or woudl i be wasting my time and money

Hope someone can help me

Cheers in advance

Ian

 

[LM Ceramics]

any builder or tiler should no to use flexi adhesive when tiling on plywood i think maybe you should re tile it the tiles will come up quite soon another common problem with grout cracking is getting the right mixture of grout ive seen it before tilers grouting with lumpy grout

 

[DHTiling]

As mentioned this could just be a case of the wrong grout used.....replace with a good quality flexible one and THEN if the cracking still occurs then you will have to look again at re-tiling...once you sort the problem that is causing it..

 

[gardian]

wow, thanks for all of the replys.

i can now understand that i should have used some flexible adhiesive aswell, but taking it up and starting again is not an option for me at this stage. the wall tiles are laid straight on top of the floor tiles, so im assuming some of these would come up aswell if i tried to remove the floor tiles.


I will remove the grout on the floor and use some flexible stuff, hopefull i will get away with that, if not, once i have more time and more importantly money, i will take up the floor and start again.

can someone reccomend me a good quality flexible grout? or provide a link??

BTW, it was not a professional tiler or builder who laid the tiles, it was a member of the family who did it for free.

I wish i had found this site a while ago so i could have bought some proper stuff!!

Thanks for the advice

Ian

 

[GazTech]

with the flexible addition of

 

[DHTiling]

Hi Ian.........that is what the forums is about helping peeps with jobs or probs and our members like to help if they can.........

as for grout.....you could try Ultra colour plus from Mapei or Bal wide joint grout and GT1 admix.......bearing in mind neither manufacturer will give a guarentee if the prep or adhesive was wrong....

Thanks for sharing your probs with us and good luck...