Wetroom Grout Micro Cracks

[Craig Hamilton]

Hi looking for some advice I had my wetroom tiled with travertine about 4 months ago I noticed lots of very small cracks in the grout so I decided to removed the damaged areas and regrout them I used weber pro as that is what the tiler had used but I have noticed the new grout has some cracks already no traffics been on the floor just done yesterday I don't know what to do am I being over paranoid the full room is tanked with a membrane I have attached an image any advice would be great

Thank you
Craig

 

[White Room]

How wide are those grout joints, was the grout suitable for that width.

 

[Time's Ran Out]

Looks like a cracked tile on the left!
More grout than tile I think.
I'd have got the tiler back rather than mess it up yourself. Doubt if he'd be interested now ( if he was originally).

 

[Craig Hamilton]

The gaps are 4mm the grout said suitable for gaps 1-10mm
Cheers
Craig

 

[Craig Hamilton]

I called the tiler he wasn't interested and it was already messed up yeah that's the only cracked tile on the floor so u think it's a grout problem?

Craig

 

[Rizzle from the Portizzle]

so many wrongs travertine 100x100 more holes than a swiss cheese wide joints the wet room from hell you could not have chosen a worse tile to use .or grout joint size 6 to 10mm you want some advive dont ever use it .
or spend two hours a week and more just trying to keep it clean.

 

[One Day]

If travertine (which is oh-so-porous) is used in wet areas without epoxy grout and saturation sealing with something very good, then I really hope the waterproofing in your wet room is top-drawer!!

Serious note now: If there is excessive movement on the tray it could cause the micro-cracks.
Do you know what kind of tray was installed and onto what?
A picture of the drain may yield further clues...

 

[Craig Hamilton]

Hi the tray was an akw tuff form the subfloor was 22mm chipboard the tray was screwed directly on top just with a hole cutout for the drain there was also straps put across the joists at each end of the drain the tray feels solid and there has not been anyone on it since it was regrouted so should not have had any movement

Thank you
Craig

 

[GAZ5518]

Could be that the grout has dried to quickly and shrunk ever so slightly .. Did you "parge" it well into the joints.... And as before ... Not the best choice for a wet area..keep it well sealed..