To silicon or not to Silicon, that is the question

[mitchino]

I have just finished tiling a three wall matki shower enclosure with glass mosaics. There are two vertical corners, and three horizontal corners. The horizontal corners of the shower tray have a lip and the tiles overlap this to provide a seal.

Do I have to put Silicon along all these edges? I'd rather not, but if it means it's more likely to leak then I will. It's been grouted with Mapei flexible anti-mold grout.

 

[Stewart]

I would Silicon all the internal corners of a shower without question. This will make it water tight and look much better IMO if done properly and neatly.....


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[nybor62]

deffo seal , theses joints are also expansion joints

 

[peteablard]

I'd definately Silicon

 

[Ian]

As above, Silicon is a must. Get one that matches your grout colour.


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[Polishtradesman]

Did you do surface waterproofing before you fix mosaics?

 

[mitchino]

Did not do surface waterproofing, mosaics are laid onto bare aquapanel.

Before I renovated the shower, it had white Silicon in the corners. It looked a bit rough, as the mosaics and grout mean it doesn't have a nice straight edge. I will Silicon it according to everyone's advice, but would prefer to do it in clear Silicon. Any reason why not?

Thanks BTW for all the help so far - fantastic forum.

 

[kendo1]

It depends what looks right, and your taste.
Normally white or grout colour looks correct.
Alternatively, I have used grout made up with latex for vertical joins, but you have to work fast.
And get a decent silicon_ no cheap stuff! You'd regret it in the long run.

 

[Polishtradesman]

use grey one. Gray is neutral colour and it less visible

 

[Thespanishtiler]

joint should be 'open' ie no grout in it, Silicon then is gunned into the joint to seal and allow for movement.

do not grout then Silicon over the top.