Tiling onto 6mm ply

[jay]

the tile in pic is that the only one that has cracked

 

[theskiingbear]

Hi Jay, yes it is but as I was saying we havent walked on the floor yet....

 

[jay]

the cracks in pic are movement cracks not shrinkage cracks 6mm ply is way under specs cant understand why a tiler would downgrade if the right material is already there height diff or not a regrout will not rectify this problem in my opinion and think its best to remove all and re do with the original ply (18mm plus)
cant believe im gona say this but plumber was right
sorry not the news you wanted but best to go over board with prep work than to skimp

jay

 

[theskiingbear]

Depressing to hear but what I was expecting. Thanks for your view. Someone else suggested backer board, that way we could avoid the step. So we'll pursue this line of discussion with the tiler. I presume the tiles will have to be broken to get them off?

 

[jay]

if the floor is solid it may need noggin and strengthening and floor boards screwed down then 6mm cement sheeting will do the job but i think the issues you have are in the sub floor good luck and yes tiles if laid correct will be broken on removal talk to the tiler but if he insists on re grout you may want to hold money for a while

 

[kilty55]

you are risking your job for a 3rd time ski by asking this tiler his opinion on prep work

he clearly doesnt care about prep as he advised 6mm ply,if it was him who done this i would get him to pay another installer to correct it personally

you have already given him the chance to rectify it and his suggestion was to re grout it....thats not the solution

hope you get this sorted it must be a nightmare for you

 

[The D]

in my opinion backer board is the way to go it will not shrink rot or take in moisture and it will not create a step at the door. a quote from BS5385 3.2.4.2
The use of sheets and boards that are subject to movement from changes in moisture content, e.g.
wood-based materials such as plywood, chipboard, wood particle boards, etc. should be avoided if at all
possible. If such boards have to be used they should be restricted to small areas and tiles should not bridge
joints between boards. It is good practice to seal all exposed edges and the backs, but not the faces, of such
boards with a suitable sealer to prevent distortion by atmospheric humidity changes. Care should be taken
to ensure such boards are not installed in a condition where their moisture content is higher than the
ambient equilibrium moisture content once the tiled installation is in use. Failure to observe this can lead
to subsequent warping and distortion of the boards with consequent cracking and delamination of the
tiling.

 

[theskiingbear]

Its been a total nightmare. Who can you trust??! These tilers have been in business for 20 years and well recommended. I cant believe this to be honest. Thanks to everyone for their comments.

 

[jay]

you could ask Dave to get someone to have a look if you like its up to you (but its best to let your tiler at least try to fix first) remember you have knowledge now

 

[theskiingbear]

Cheers!