I personally like Hardibacker. Its completly water proof , and its extreamly durable.
Tip; make sure you put a bed of thinset mortar under the backerboard then fasten it down with screws, nails or staples.
also dont get any backer board over 1/4 " its really difficult to cut. And a bit of an overkill if you ask me.
Good luck.

well none of them are waterproof,however backerboard is as close as you will get...use hardibacker it will be easy to prep...good luck

THANK YOU GUYS BOTH OF YOU SUGGESTED THE SAME THING SO THATS WHAT IM USEING!

[This message has been edited by bradbo (edited August 25, 2003).]

Actually the 1/4 inch hardibacker has more strength than the thicker hardibacker because the 1/4 inch hardibacker is produced under more pressure according to the sales rep I talked to when I worked at Home Depot.

Your critical areas are going to be your perimeters. You need a good caulking around the edges.

Franklyn
http://WoodFloorist.com