how about a leakproof shower?

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Moderator Post (s) for this thread: > Shower Weeps by LonnythePlumber on 01/10/2005

http://www.schluter.com/english/products/2002/sectionh/overview-h/section-h.html
for a system that won't leak and grow mold in your tiled walls and floors.

and i have not seen your particular method of yours, but it seem that the sand would eventually migrate down the drain and leave a void.