Need HELP !

[Time's Ran Out]

As it happens I've just fixed the 250x400mm Laura Ashley Cambridge wall tiles this very day!
They are made in England (and that should tell us something) and they are a very porous biscuit indeed with an extremely soft glaze.
I have not seen the actual floor tile you have ie 450x450mm Laura Ashley Cambridge, but if it is similar to other English made floor tiles in the Cristal range they are sold as bathroom floor tiles for use with bare feet!!!!. They do not recommend shoes.
In my experience these tiles are NOT suitable for floors, let alone Wet room areas and I'd have refused to fix them ( which I have recently done when pointing out to the client this useage). Check the boxes for class of resistance/area of use and you may well find this tile is NOT suitable for the purpose purchased.
The colour change would be a water ingress from either the joint - through the grout - or through the soft glaze!

 

[TPW]

me thinking you may have a leak and being waterproofed the water cant go anywhere normally its just the edges of the tile that change color (picture framing) but for the whole tile to change means the back of the tile is saturated take it the tile has a brown biscuit back . does the room have a walk in shower and did you use a puddle flange

pics would be better

The tile has a red biscuit and it is a wet room and the whole room was water proofed correctly with a tanking system, there is a electric underfloor heating mat installed as wel, could this be a problem ? how can water be getting to the back of the tiles ? when they have been grouted ?

 

[jay]

grout is not waterproof and if no puddle flange fitted any water that goes through grout or gaps has no were to go due to waterproofing then it is absorbed into biscuit of tile and normally on cheaper tiles changes the color
would help if you could give us a run down of instalation method starting with sub floor and then listing what was done next ie cement sheet or w/p or ufh and materials used best bet is a pic of whole effected floor were water stop bars use hope this helps

jay

 

[aph257]

sorry my friend but cement based grout is not waterproof, regardless of what is says on the label.