Silicone internal corners... - TilersForums.com

[jubba]

Hi Carole, the internal corners should not be filled with grout. The gap is filled with flexible silicone, so that it does not crack due to heat expansion. If it is filled with grout it will crack, it is not the way it should be done.

All makes sense about using silicone in the corners.

So when you fix the tiles should a deliberate gap be left (use spacers) in the corner rather then butting the tiles together?

 

[Rich]

All makes sense about using silicone in the corners.

So when you fix the tiles should a deliberate gap be left (use spacers) in the corner rather then butting the tiles together?

Yes, I use wedges and leave about 2mm

 

[FreeD]

I alway use a flexible grout, and grout everything, then silicone when grout is dry.

 

[jubba]

Would the same expansion gap be left when tiling down to bath, to leave a void to fill with silicone?

Or should the tiles actually rest on the edges of the bath then silicone across the joint?

 

[hillhead]

Jubba and FreeD, leave a gap down the internal corner 2mm minimum.
Do not use flexible grout then silicon over.
Grout all walls leaving the vertical corners clear of grout.
When grout dry and any cleaning off done silicon the corners with a colour to match the grout.

 

[hillhead]

Would the same expansion gap be left when tiling down to bath, to leave a void to fill with silicone?

Or should the tiles actually rest on the edges of the bath then silicone across the joint?

Yes jubba, leave again about 2mm along bath and fill gap when grout is dry.

 

[Rich]

As above, if you grout then silicone over the top, the grout will tend to crack and come loose and take the silicone away with it over time.

 

[RichieHall]

I'm just about to do a similar job, so let me just recap the above advice to make sure I understand,

For an internal corner I would need to leave a gap between the wall and tile of the tile depth (+ Adhesive) plus about 3mm on both walls, leaving a 3mm diagonal gap between the two tiled walls, then fill the gap with silicone?

 

[JMW]

I'm just about to do a similar job, so let me just recap the above advice to make sure I understand,

For an internal corner I would need to leave a gap between the wall and tile of the tile depth (+ Adhesive) plus about 3mm on both walls, leaving a 3mm diagonal gap between the two tiled walls, then fill the gap with silicone?

Spot On.

 

[Mike]

I'm just about to do a similar job, so let me just recap the above advice to make sure I understand,

For an internal corner I would need to leave a gap between the wall and tile of the tile depth (+ Adhesive) plus about 3mm on both walls, leaving a 3mm diagonal gap between the two tiled walls, then fill the gap with silicone?

i'm trying to understand your post, when tiling the first wall into the corner, leave a gap of 2/3 mm for expansion. when tiling the second wall into the same corner leave a gap of 2mm between the 2 tiles again for expansion. rake out any grout from the expansion joint prior to siliconing