Underlayment installed with toilet drain cutout.
Install vinyl plank around or under toilet.
Installing under a toilet after you remove the toilet which is often a two person job you need to measure the position of the flange and cut a hole for it in the flooring using a jigsaw.
Install the vinyl plank flooring.
The previous owner had the bathroom carpeted which went around the toilet but not under it.
Then the toilet is reset so the base covers the cuts around the drain.
The hole for the toilet drain and notches for for valves and piping were cut with a saber saw.
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The toilet has to be removed and the flooring cut to go around the floor drain.
I removed the carpeting and installed some vinyl plank flooring lifeproof from home depot.
If you are installing vinyl planks in a bathroom you may need to temporarily remove the toilet or you can install around it.
My question is about the mounting flange that was on the floor specifically regarding the height relative to the toilet.
Whether you re laying ceramic vinyl wood or something else on your bathroom floor you ll deal with the toilet in the same way.