Ok so my bath room floor is bad. I'm going to be removing the bath tub, sink, and toilet. Ripping up old floor and laying new sub floor then laying tile. I want to install a floor drain but not too sure how to go about it. I know how to install a trap and hook it up to the swear. I know I will need to cut a hole in the floor for the drain. My question is when I tile around it how do I water proof it. Do I just fill in the space around it with grout and make it flush or what. I don't want water to get underneath the drain ruin the floor.
Thanks

edit *. I know how to install a trap and hook it up to the sewer. *

Hi Kadimkris:

A few questions for you... OK? Why are you adding the floor drain? Is this floor drain going to act as a floor drain or as a shower drain, by chance? Let me know.

If you are simply adding a floor drain then water proofing the floor drain shouldn't be a big issue... can silicone seal it to the tile for a good seal or even add grout.

If you are trying to use this as a shower drain then the floor drain will need to have a vinyl or PVC liner added to it and the whole floor will need to be protected.

Finally, if you plan to simply add a floor drain to the bathroom you'll need to consider how to VENT that floor drain AND you'll need to install a TRAP PRIMER so that the floor drain won't dry up and allow sewer gasses into the bathroom. Let us know if you want to discuss this.

Back to you...

Mark


PS: You will add new layer of subfloor and then install cement backer board for the tile... right?

Yes about the floor. The drain is in-case of overflow of the toilet and for ez cleaning of the tile with a deck scrub.

Not a great idea. I would not install a floor drain in a bathroom just in case you get a back up. First off the floor is flat so draining is not going to work well. Can you tell us more about what caused the old floor to fail?