Question: We are looking to do new flooring in our downstairs bathroom. My wife likes a flooring material by a company called COREtec; specifically their ["Calypso Oak"](https://coretecfloors.com/en-us/products/coretec-enhanced/calypso-oak-vv012-00761) LVP/LVT product:

[![enter image description here](https://i.stack.imgur.com/5sVn3.jpg)](https://i.stack.imgur.com/5sVn3.jpg)

[![enter image description here](https://i.stack.imgur.com/cWnec.jpg)](https://i.stack.imgur.com/cWnec.jpg)

Our bathroom, which currently has tiled flooring, is small and has a toilet, a pedestal sink and a doorway leading into our kitchen (so we would need a threshold). My wife seems to think we can just install this COREtec right over the tiled flooring.

What considerations do we need to look at as far as (a) subfloor/bottom support for LVP-style products and (b) edge treatment/support (e.g. meeting walls, toilet flange, etc).

Can anyone weigh in on the proper installation for this material? In particular is it OK to install/float over tiling?

Answer: 
I have installed that same flooring over tile there is no problem with that.
Remove the toilet and when laying the flooring around the toilet flange add a bead of polyester caulk such as Vulkem between the ceramic tile and the new flooring. Then use a foam toilet seal. I like Saniseals available online. Have used them for years with no issues. When the floor is complete I caulk the baseboards to the floor to give it a little better seal in wet areas.
I have used this method of install in over 30 baths in the last few years with no problems.
Personally, I would take out the tile, but doesn't sound like you have too. Some of the vinyl plank flooring is not strong enough to bridge the gaps between tiles where the grout is lower. Eventually, those lines will show through.