My suggestion is first talk to the builder to see what instructions he gave the tiler as i'm sure he doesn't want a dissatisfied client. Most tilers will check with the builder before grouting especially when a colour is not specified in a contract. I would then ask if the grout could be replaced, from the looks of it it will only be a couple of hours work. There is nothing worse than having to look at something you are not happy with. I would not use the paint product as it will alway look like it is covering a mistake. White will look better. Make sure the mixer body is waterproofed or you will have a leak in your wall, the membrane should lap onto the body from the wall if it is done well. All the best.

Hi jgjustingordon63! Good luck with your reno - it can be exciting and scarey doing a reno! Have you considered doing subways a bit differently such as the pic below (I found via Pinterest)? This way, it doesn't matter really the size. Check with your builder/tiler re the fall if you want large-ish tiles for the floor. If it's a small bathroom, this might be an issue. In the pic above they've gone with small tiles which also looks really lovely. One other point I would make from experience...We used charcoal floor tiles AND grout. Bleach can discolour the grout, so you just need to be aware of that. There are ways around it and you can re-grout down the track (at an expense) but just giving you the heads up here! Good luck!! And do post after photos when you're done!

I think she may have been referring to what is called a "French Pattern" which looks like a random mixture of square and rectangle tiles, often in travertine. However while it looks random it is actually carefully planned, and the tiles are made to a consistent thickness. It also depends on the type of tile that you are using. Many traditionally hand-made ceramic tiles have a natural variation, which adds to their appeal and visual interest. Other types of tiles, such as your porcelains are much squarer, flatter and almost identical. I would suggest that you go with your your choice of grid pattern, as laying a random pattern has too many risks (plus your tiler will hate you and charge lots extra). Be very careful about the selection of your tiles depending on your preference for a rustic more organic look, or a hard-edged architectural look. Make sure that the surface that you are tiling to has been properly prepared and is flat, smooth and true, as your tiler will not be able to correct imperfections if you have a bad wall. Best of luck, Dr Retro of Dr Retro House Calls

Hi Caroline, A few inspiration photos for you, try using subway tiles in a stacked style for a modern contemporary look, much more stylish than the overdone normal subway look, would look great in both areas, your tile store will advise the size of tile that will best suit your requirements.