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I've got to two outside 45 degree (some folk might call it 135 deg ) joins (floor to ceiling) to deal with when I tile the bathroom.

All the tile trim I've seen is for 90 degree joins

I could cut one edge of the tile to 45deg (the tile cutter should manage that) but it will be fiddly and end up sharp and fragile.

Any advice how to get a neat finish?

Cheers

45degs is twice as sharp as 135degs

If you draw a straight line, then add a 135 deg line the 45degs is the cheese wedge.

Can't you silicon the gap

By saying 'outside' 45 deg I was trying to refer to an obtuse (90 +) 45 degree which yes is 135 degrees

If I was going to silicon it, I would just grout it.

I probably didn't say it's a tile to tile join.

Basically I'm taking away a 90 degree internal wall that juts into the bathroom and replacing it with a 45 degree chamfer to give more room.

As all the bathroom is being tiled I want to make the join neat.

The plastic corner strips would open out to 135degs but I would prefer to see a grout or silicon bead.

I think trying to take the back edge off will be a nightmare unless you could borrow a wet stone

I agree about cutting a 45 degree chamfer on one tile. Even if I could do it neat (the tile cutter bed can raise to 45 degrees) it would be prone to chipping etc.

I think I will butt the base of the tiles tight together and then put a bead of something in the gap. But grout of silicon - options options LOL

I wouldn't do that on a right angle, but hopefully a 45 deg gap won't look too horrible...

Thanks