Can I install 12x12 porcelain tile on a shower wall or ceiling?
I've seen it on the wall before but never ceiling. When you install it on the walls you will need to stick little nails under each end of each one to support it till the thinset dries. I would advise smaller for ceiling. If you go with the big you will need to support them till the thinset dries.
Do one thing at a time, do it well, then move on.
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