On Mon, 28 Dec 2015 19:11:30 +0000, alan_m wrote:

Don't split any tiles around that boxed section - make all the tiles
19cm on one side and all tiles 35cm on the other side. If that wall is
not truly vertical/square the 6cm cut is likely to show this up.

Aye, it'll highlight a very small variation as well, 5 mm out would
show.

I would recommend that you use a plastic or metal edging strip on that
outside vertical edge

Bathroom - wet - plastic IMHO. And use the uncut ends of the tiles at
the edging strip. The cut ends at the inside corners.

For the other corner It depends where it is in relation to the door
and/or which way one will spend most time looking. If it's the corner
you see the moment you enter the room I'd center the "brick bond" at
that corner ie full tiles on one course, the course above the two
halves of one tile cut ends into the corner(*). A proviso on this is
what happens at the two next corners, how visible those corners are
and how narrow the strip is.

The "rule of thumb" of treat each wall seperately and centralise the
tiles works well enough but you can get better results if you do some
measuring and planning before hand particulary if there are any
features such as a window in a given wall. Scale drawings on paper or
computer (don't forget groutlines...) can be very useful.

(*) You may have to make two cuts, or offset from exact center, the
half the tile to take into account tile thickness/groutline etc. The
uncut edge has to be centre of full tile less width of groutline
divided by 2.

Full tiles fitted with a grout filled void (v) and small gap for a
groutline in the corner.

+-----------
| v | full tile
| +-------
|---+
| f |
| u |
| l |
| l |

The cut tile one goes into the corner the other almost butts against
it to maintain the groutline up the corner.

+----------- +----------------- window
|| cut tile |---+ | cut tile
|+------- | c | +-----------
|---+ | u |
| c | | t |
| u | | |
| t | | |
| | | |


Which way round depends on the viewing angle of the corner and where
any windows are in relation to the corner. I think you want the
shorter cut tile on the same wall as the window, so light from the
window doesn't illuminate the "exposed" cut edge of the tile.

--
Cheers
Dave.