If you have enough water permeating the tiled walls to actually run down the wall to the pan, you have bigger problems than what a coating or vapor barrier could address.With full contact of thinset, there shouldnt be enough connecting voids for water to pass.

My only guess is that the water might be permeating the concrete block wall.

I even find severe urine can be in the walls, from both peeing/spraying on lower walls and trims and I think (not sure exact science) it even permeates surfaces of sheet goods (like sheetrock, paneling etc).

Sorry, but I'm an old timer who just doesn't hold to the politically correct crap that permeates our judicial system these days.

Even if they don't smoke on the property, the smoke permeates their clothing and the odor can foul the unit.

Prevent water permeation.

It’s one of the biggest disservices that permeates real estate investing.

Smoke permeates everything and extremely difficult to remove the smell.

I did that, needless to say still to this day the smell is so bad, it permeates the whole house and gives everyone a headache, I have complained to the real estate but they are insisting that their hands are tied.After literally spring cleaning for well over 3 weeks everyday after we moved in, I finally got the house up to the standards it should've been in before moving in and what we were lead to believe what would happen.

They ended up using materials that actually puts off a gas and permeates porous material(wood and concrete) and eats up metals.