Advice needed grout cracked - TilersForums.com

[John Benton]

Soŕry WalLuigi, no.

Any of you guys used the Mapei colour match sealant in the corners and can you get a good finish/match with grout?

Yep pretty good colour match

 

[Waluigi]

Colour match round a tile as an access panel .

 

[GoneGuy]

The Mapei could match silicone is spot on

 

[Ian Barrow]

An update - builder been back today but just put silicone over cracked grout, what are the problems, if any, of this?

 

[acaciaguy]

It’s wrong. Silicone in corner joints not grout. He’s just covered over the issue. A full silicone joint is better for flex and water sound

 

[Time's Ran Out]

Now here’s an question!
What did you all do before the colour matched silicone was available?
You see in my opinion the builder did what we used to do - grout the corner and go over the dry grout with a clear or white silicone.
The bigger issue here is why is it cracking so much that it’s become a major concern?
As a tiler, I silicone the corner, fix the tiles, grout, then silicone the tile face again. Always have always will!

 

[acaciaguy]

Wally asks why didn’t you use fully silicone in joint? If the colour is white or clear. Why grout?

 

[jasper]

Don't be so quick to judge the builder. Silicone is great unless you happen to have RIW tilesafe membrane behind. I would normally leave the internal corner joint free of grout then silicone knowing the silicone would bite nicely into the gap however CCL Wetrooms advise if you use silicone then warranty will be void. Builder may have been following instructions. RIW also advise the same. And that's why I won't use the bitumen style membrane