View Single Post
Unread 11-24-2020, 07:25 PM   #5
Veteran DIYer- Schluterville Graduate

STAR Senior Contributor

Join Date: Jul 2004
Location: Nashua, NH
Posts: 14,225
The floor plate is a Rochester, NY, Monroe County used to be a requirement for installing a toilet. I think they thought all toilets would end up leaking, and rot the floor out, so having a stone plate underneath was a good idea! I ran into that long time ago when I was helping my sister at an older house in the city.

As said, planks, especially those that aren't T&G are not a great support for tile without some help.

If you want to minimize the overall buildup, a 1/2" ply, then something like Ditra would gain you about 1/8" and is easier to install, cut, and carry home than cbu. There are specs and instructions in the 'liberry' on what ply and how to install it.
Jim DeBruycker
Not a pro, multiple Schluter Workshops (Schluterville and 2013 and 2014 at Schluter Headquarters), Mapei Training 2014, Laticrete Workshop 2014, Custom Building Products Workshop 2015, and Longtime Forum Participant.
jadnashua is offline   Reply With Quote