Kerdi valve seal installation question
Hi there, me again...
We have opted to have a Kerdi membrane installed as part of our bathroom reno. The question I have concerns the shower mixing valve seals. Apparently, Kerdi seals are only available in two sizes: one for the pipes and one for mixing valve seals which is a 4 1/2" round thing.
Our Riobel Retro mixing valve have oval face plates which are 4 3/4" at their narrowest.
Me thought, no problem, the face plate will fit nicely over the round Kerdi valve seal. And the lip of the seal will not protrude beyond the side of the tile. We're good.
Tile pro nixed that idea and although he did use the pipe seals, he went ahead without installing the Kerdi valve seals. Said he'd walk if I insisted on them because he would be doing me a disservice by installing them. He explained that the valve seals are overkill and that they would get in the way of laying the tiles properly. Said he'd run a proper bead of silicon around the outside perimeter of the face plate to make the seal. Gasp....
Doesn't that defeat the purpose of having a Kerdi system installed in the first place?