In order to get started, we’d always recommend checking the bolts first of all, as your problem may be far simpler than anticipated, and may just involve tightening a few loose bolts.
Oftentimes, the gaps will be all around the base of the toilet, so check the back, front, and sides in order to make sure that you’re doing a thorough job.
You will notice as you do this that you may need to insert quite a few shims in certain areas, and even stack a few on top of one another, depending on how large the gaps are in your toilet.
Push the shims as hard as you can, in order to make sure that they’re underneath the base of the toilet. Sometimes, you may feel like they could go further, but you’re not able to achieve this without a tool.
For our next step in the process, we’re going to be taking a look at how to trim your shims, so that they aren’t sticking out anywhere. Trimming your shims is actually incredibly easy.
Now for our next step, we’re going to start caulking the base of the toilet. If you’ve never done this before, our key piece of advice would be that precision is key.
Make sure that you leave the caulk to dry for approximately 12 hours. It’s good to leave it overnight, as this ensures that it will be fully dried and secure by the time the morning comes.