Laundry room floor with drain
I would like to re-do the flooring of our second floor laundry room with tile and a floor drain to guard against possible flood damage. The room is approximately 6 x 6 feet. Currently the room has a wood floor which I assume would be removed down to the joists.
From what I have read, the most common approach seems to be to construct the floor exactly as you would do for a shower, with the additional requirement of a trap primer to keep water in the trap. I have seen a couple of suggestions that the slope requirement of 1/4 inch per foot could be relaxed to 1/8 inch. From what I understand, the most common way of doing a shower floor is to use a mortar bed with a pre-slope, then a waterproof membrane, then another layer of mortar, and then tile with thinset.
The disadvantages of the mud job approach that I can think of are (a) it's expensive, and (b) it will add about 3 inches to the floor height, resulting in a step up from the adjacent hallway.
I did read a couple of suggestions that the Kerdi shower system might be used for a laundry but (a) none of the tilers I have spoken with for past projects have known anything about Kerdi showers, and (b) I'm not sure whether the Kerdi shower system is approved for the weight and vibration demands of a laundry room.
The job will be done by a tiling contractor, but I would like to educate myself on the options and best practices before I start talking to tilers.
Any suggestions or comments from the experts would be appreciated.