also will give illusion of a bigger bathroom if you use bigger tiles ..I used small ones on one wall as feature wall and larger ones on other walls ..

It can either look really dramatic or too dark, depending on the size of the room as well as your other components. I've attached a couple of images of our work using dark tiles, the smaller bathroom we have surrounded the bath with dark tiles but then balance it with an extra large mirror to bounce the light around the room. The larger bathroom we have taken the floor colour way onto the wall but used a different texture on the walls for drama. Hopefully this gives you more of an idea but you shouldn't to nervous of the room being dark, it's where you can create a contrast as well as textures. Look forward to seeing what you go with in the end.

I would talk to your tiler or builder first. We have the timber look tiles in our bathroom and absolutely love them - they are on our floor and one one feature wall - but not in the shower. We love the look and they are very easy to clean. As for tiling them in your shower and ensuring fall for drainage etc... definitive answers from your pro's should guide you there. Hopefully one of the pro's on Houzz may help here.

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