Tiles changing colour - TilersForums.com

[MIKETILER]

Have been tiling for a few years and have never come accross this problem before.I laid glazed tiles in a bath/shower and over the last 6-8 weeks some of them have changed to a darker colour.I immediately thought that there was some sort of water ingress at the back and this was soaking into the biscuit.After inspection everything is bone dry.The customer bought the tiles from topps and they were fairly cheap £9.00 a box.One of their staff had heard of this before and said it could be the adhesive that has reacted with the biscuit.The customer has steeped a spare tile in water for about 4 weeks and it hasnt changed colour at all.Customer phoned me today to say that another tile was changing colour.Anybody else out there that has experienced this baffling problem

 

[Alan.P]

It could be something reacting with the biscuit as you say, I would hazard a guess that the customer is cleaning the tiles with something they shouldn't be. What colour were they and what colour change is happening colour wise ?

 

[MIKETILER]

Its a tile available in Topps called Valencia Beige its a marbled effect.They are going slightly darker.Its strange that the full tile is changing colour and not ones next to it.

 

[doug boardley]

it does sound as though there maybe something from the substrate leeching into the tile biscuit and then the grout is preventing it from progressing into the neighbouring tiles. What was the substrate Mike?

 

[david campbell]

it could also be something in the shampoo/shower gel thats causing it to react like that

 

[MIKETILER]

the substrate is tanked gyproc and the adhesive BAL whitestar.I dont think its a staining from gel or anything like that as the colour change is exactly a full tile

 

[MIKETILER]

Here is a photo.Its the 2 tiles by the shower valve which is fully siliconed and the 2 cuts in the corner which sit on the bath

 

[doug boardley]

ouch!! they are very noticeable

 

[DHTiling]

I would be checking there is not a leak with the shower..

 

[doug boardley]

whereabouts is the new one that's changing colour Mike?, (assuming that this photo was taken prior to customer ringing you today)