Schluter KERDI Board, Delta Multichoice Shower Valve Body Rough In

[davelowry17]

Hello!

I'm installing the Delta MultiChoice Universal Shower Valve Body Rough-In Kit, Model #R10000-UNBXHF. The finished trim is the Delta Vero 1-Handle Shower Only Faucet Trim Kit in Stainless, Model #T17253-SS.

The shower side wall consists of Kerdi board that will be tiled.

The plastiguard, included instructions, plus info on this forum have me all set for setting the correct +/- depth to the "finished" tiled surface.

Questions -

1. Does the plastiguard for this Delta Rough in Body stay on or do you remove prior to final installation?
2. The Schluter KERDI Board also includes a 4 1/2" dia round mixing valve seal. Do most of you cut a 4.5" hole, centered on the valve body and use the provided seal for this application?

Thanks in advance for all the help!!!

 

[Jadnashua]

That is sometimes referred to as a plaster guard, as in keep plaster away from the valve if you're using plastered walls, or a mud wall. It has another purpose on a thin-wall enclosure (say fiberglass that is somewhat flexible) in that it is then left in place with a smaller hole, so it acts like a support when you then screw on the cover plate and sandwich things together (this prevents you pushing the wall away from the trim because it's sandwiched together). When tiling, you don't need it except to help center things, and get the valve body set at the right depth...IOW, you can remove it and not worry about it after. Your tiled wall will be more than stiff enough to prevent it from flexing.

 

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[davelowry17]

That is sometimes referred to as a plaster guard, as in keep plaster away from the valve if you're using plastered walls, or a mud wall. It has another purpose on a thin-wall enclosure (say fiberglass that is somewhat flexible) in that it is then left in place with a smaller hole, so it acts like a support when you then screw on the cover plate and sandwich things together (this prevents you pushing the wall away from the trim because it's sandwiched together). When tiling, you don't need it except to help center things, and get the valve body set at the right depth...IOW, you can remove it and not worry about it after. Your tiled wall will be more than stiff enough to prevent it from flexing.

Thank you, Sir! And, good to know it's not called a plastiguard but rather a plasterguard!