Shower tiles cracked grout

Dave82

neilmcl said:

m0t said:

It looks from the picture as though the bottom row of tiles are sat on the shower tray. As the tray flexes it causes the grout to crack.

I'm not an expert but when I tiled my bathroom I was told to leave a 2-3mm gap between the bottom of the last tile and the bath and shower. That gap then gets filled with sealant which flexes with the movement and stops your tiles cracking.

Can you replace the tiles with some slightly shorter ones?

I agree, I don't think there's enough of a gap under the bottom row of tiles to allow for movement.

Even with the new pics? There is a good few mil clearance. I just think my silicon job was so fantastically neat ;-) it looked like there was no clearance in the original pictures.

Dave82

Also I get what people are saying about the tray but it almost looks like the lip is supposed to be tiled onto. I think even if I leave clearance with the adhesive when grouting the vertical lines it will push through and touch against the lip. 

Tucker

That shower tray has an upstand. Personally, I would use silicon between the upstand and tile at the bottom and also under it. 
With flexible grout suitable for wide joints, it shouldn't be possible for any moisture to get behind the tiles. 

john.h

Don’t use pre mixed adhesive. Get this type https://www.ctdtrade.co.uk/adhesive-grout/tile-adhesive/20kg-ardex-x-7-w-standard-setting-flexible-tile-adhesive-white#ns

john.h

Really the walls should of been boarded with a waterproof board, or the plaster board painted with a tanking solution. If the plasterboard is wet at the bottom it will be soaking up the wall also.