Leaky toilet flange?
When we moved into our home 7 years ago I discovered 3 days after settlement that my bathroom floor was rotted from water damage. I assumed back then that it was because the wax ring had been in need of change and was neglected. It was also peculiar that the toilet rocked a little when sat on.
I ripped up the ceramic tiles and subfloor and installed all new. I was, however, the unfortunate victim of bad advice regarding the subfloor. I went with 5/8" plywood and a self-leveling compound/floor prep rather than cement board, and ceramic tiles on top. The toilet still rocked ever so slightly, but not as much as before the renovation.
Fast forward to a few weeks ago. I started noticing water on the floor in the bathroom beneath the above-mentioned bathroom. It turns out it was dripping from above and through the vent fan and only happens when we sit on it to give my daughter a bath. The toilet has still always rocked and it appears that rocking is what triggers the leaking. Not flushing, not gently sitting straight down and standing straight up, but rocking.
We replaced the wax ring and that didn't stop it. We replaced the toilet and that didn't stop it. So last night I removed the new toilet, took out the vanity, and ripped up the tiles. The subfloor is water-damaged but not nearly as bad as it was when I renovated the first time. It's also worth mentioning that the floor has never been perfectly level and I have a feeling that contributed to the rocking as well.
I'm planning to rip up the subfloor so I can get a better look at the toilet flange and the rest of the plumbing. I'm not sure, however, exactly what I'm looking for or how to tell if the flange is actually leaking.