Originally Posted by AbSoluTc
I have a toilet that is of course - wobbly. However, it's not caused by the standard problems one might think of. Here is the issue..
The screws holding down the flange are not going through any of the sub floor. They are going through the hardy backer that is on top of the sub floor. The issue appears to be a gap around the toilet hole itself that only has the hardy backer around it. The sub floor falls short. This is an older home and was recently remodeled. There used to be cast iron pipes, now they are pvc.
I have looked it over and will have to remove the toilet and see about screwing it back down correctly. The good news is there is a joist directly to one side so with some long screws, I should be able to get it connected there. However, on the right side, there is at least a 1" gap where the sub floor is not. Is there some sort of device or what not available for an issue like this? Something I can clamp to the underside so when I screw down the flange it has something to grip and attach too?
Speaking (or posting) as a DIY'er. Your TOP priority, indeed should be to have the toilet clamped down properly. Otherwise you will have a "Leaky toilet" issue with the Wax ring. But, after proper clamping, the toilet bowl may still be wobbly, as happened in our case, where a new floor was redone in the bathroom. There was a gap between the NEW floor and the front half of the bowl. The solution was very simple. The gap was filled with plaster (around the front half) and it worked. Proof. After 2 1/2 years it's as steady as ever.!!!
(No matter what) Don't Drink and Drive!!!