Installing shower door on Tile

First time poster here. I am about to have a local company remove the existing drop in shower and add a second shower head in the ceiling, tile the walls and ceilings and install a new shower door. I went to the local tile shop and picked out the tile for the for the shower floor and Threshold. The company that will be doing the work has told me that I can't have a shower door sitting on tile and that it must be marble. They said that they can't guarantee the door will not leak if it is on tile. I really don't want a piece of marble for the thresh hold but the tile I picked out. Is my contractor correct? For some reason I think no because I am sure there are doors installed on tile that do not leak.

Also, tile store said it can be done so I bought the tile then the owner said the door installation on tile is not recommended.

Help please....

 

BULL-DROPPINGS!!!

I can't imagine how some people stay in business shoving that kind of nonsense out the door all the time.

In my 30 plus years of doing tile showers 99.99% of my shower curbs/dams/thresholds have been tile. Don't know of a single one ever having the door leak at the bottom.

They must be concerned about the few grout lines that the door seal won't get into but that's nonsense too.

 

Agreed almost every curb gets tiled. The curb will be sloped toward the inside of the shower so any water that can possible get under the door seal in the grout joints will come back in the same way it went out for the most part. Get yourself a new tile guy. This guy is bs ing you.

 

Whaaat??!! Without further ado, I concur with the gentlemen above. They said it succinctly and without using the terms I was thinking. All my berms are capped in matching tile. Marble, my foot!