Originally Posted By: RAH
Definitely use a cement or other suitable underlayment, and tape and mortar the seams. Spend the time and care during this step, or the rest will never end up like you want. Porcelain tile is tough stuff if installed correctly.


Ditto. Just like building a house, it isn't any better than it's foundation. Get a great foundation, and you won't have many problems, if any at all.

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