Generally, if the variation in the
floor is 1/4" or more then using your
thinset mortar is usually not recommended for fixing it. If you just have 2ft x 3ft there's no problem using usual (not
thin-set) mortar to
level the
surface - it
will be cheap (likely cheaper that self-
leveling concrete) and quite easy to
do.Apr 23, 2013
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