Corner butting

[Satinseat]

Looking to tile 900mm quadrant shower with 300mm wide tiles, ie three tiles each side, but to get even width I will have the tiles touching in the corner with a space the thickness of the tile the height of the shower. Do I fill this gap with adhesive or mastic. Sorry can't explain better. (if I butt up one tile onto the face of the other means no gap behind but one side will be the thickness of the tile shorter than the other.

[Grendel]

I can see what you are describing. I'm a joiner rather than a tiler although I seem to be a fair bit of tiling . To be honest I'm not sure of the answer If there is an actual answer . I've seen corner joints done both ways in both grout and mastic and tend to feel grout looks better unless there's likely to be movement . As to " losing" width by butting upto the face I doubt if most would even notice but if it's your own you'll know it's there and your eye will always be drawn to it.

[Ktuludays]

Grout or sealant will suffice. Personal preference dictates which.

Re your issue, there is no real solution as you want a tight seal.

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[wine~o]

Satinseat

No pro tiler would butt up a corner as you describe. Corners are *almost* never plumb and square, the outage is normally covered by cutting tiles to the wall,.