How do I tile over membrane in a shower floor?

Question

I'm taking over a tiling job that is half completed, in the shower the last tiler left a rubbery membrane that is loosely stapled to the lower walls and floor. I don't know if I'm to keep stapling through this stuff, or put "backer-board" on top of it (which would also include putting screw holes in it), or wheighing it down with tile (doubtful). Any advice, or tips on websites that have the answer would be much appreciated.

Answer 1

We just did this. What a pain. If you haven't previously tiled, you'll need to extend the drainpipe up about 3 inches. Lay the membrane over the flooring with a hole ever-so-slightly smaller than the drainpipe sticking out of the floor. Install the basic drain. Then you need to lay about 2-3 inches of cement over the membrane bringing it up to the top of the drain, but certainly not over it. Smooth it out with a slight slope torwards the drain pipe. Let it cure at least 24 hours. Then lay the mastik and tile over the concrete.

Answer 2

Talk to a tile man. I know you have to put a layer of 'mud' over it to properly set the tiles. Good luck!

Answer 3

This site should be helpful as it's a 'how to' for tiling:

http://www.howtoinstalltile.net/anti_fracture_membrane.htm