I'm looking at tiling some bathroom walls (actually only around the bath) with 12mm thick Travertine tiles and am not sure how to treat any external corners.

The edges of the tiles are more open than the face which has apparently been filled and polished during manufacture.

It's been suggested I could just create an external butt joint and then grout the edge with Jasmine Ultracolour grout to fill the open structure and then sand this down slightly once dry but will this look OK?

I’ve done quite a bit or normal ceramic tiling but wouldn’t be confident about mitring the edges.

John.

Can you use the standard tile edging strip?

Hi John.
For external corners dont worry about making an exact 45 degree angle, use you locost builders favorite angry grinder with the appropriate disc to back off the mating edge but not all the way to the glazed face.
butt the two tiles at the corner leaving a gap the same as the other joints and grout as normal. Simples
Regards Denis.

Stone superstore has ideas for them, something called Jolly mastic is suggested although I like the sound of kipper's idea mitring them and grouting. I did some for my niece and just used 12mm tile edge.

[Edited on 6/1/12 by Peteff]

I fit bathrooms for a living and have tried both methods. My preference is for a butt joint as it will take a knock without damage better than a mitred edge and is simpler. If you use a diamond wet saw it will usually have a 45 degree angle facility.

with a wet cut tile cutter and an angry grinder (with stone wheel) you can have a clean joint with 2mm grout gap the same as the rest of the tiling (or whatever size tile spacer that you are using). Careful measuring and cutting can give very nice results. I've done 3 bathrooms this way with mosiac on one floor and it's worked very nicely.

Steve

surely an angled joint will leave a potentialy sharp fragile edge. Have you considered covering with alluminium angle or using the of the shelf tile edging thats available