WallyGater
New Member
Is It a common, and or good practice, to set a toilet with plaster of paris under it? If so, how much do you use?
Plaster of paris
- Thread starter WallyGater
- Start date
MaintenanceGuy
In the Trades
I know an old plumber that did this if a toilet rocked or wobbled.
Code says to caulk around the bowl. I guess this is to stop sewer gasses from getting into the room. I personally think that's a bad idea because it just hides a leaking wax ring until the leak damages the floor. If you don't caulk, you'll see the leak as soon as it starts.
I've seen toilets set in thinset or tile grout on a tile floor instead of caulk. The toilet is then permanently part of the floor. Removal usually means breaking the toilet.
But leveling a toilet in plaster of paris has none of these problems. You can just put a dab in the four corners to stop wobble. It sets faster than grout or thinset. It's hard enough to do the job and the toilet isn't permanently stuck to the floor.
Code says to caulk around the bowl. I guess this is to stop sewer gasses from getting into the room. I personally think that's a bad idea because it just hides a leaking wax ring until the leak damages the floor. If you don't caulk, you'll see the leak as soon as it starts.
I've seen toilets set in thinset or tile grout on a tile floor instead of caulk. The toilet is then permanently part of the floor. Removal usually means breaking the toilet.
But leveling a toilet in plaster of paris has none of these problems. You can just put a dab in the four corners to stop wobble. It sets faster than grout or thinset. It's hard enough to do the job and the toilet isn't permanently stuck to the floor.
Sponsor
Paid Advertisement
I certainly see the wisdom in this, but I have a big con for not putting in caulk... My son. Dude is 7 and routinely leaks down the side of the toilet. Without caulk, urine will seep under the bowl and ferment. So, with this in mind, what would be recommended? Caulk, or no caulk?
Last edited by a moderator:
Jadnashua
Retired Defense Industry Engineer xxx
Caulk. Shims if necessary to keep it from rocking first...
hj
Master Plumber
- Messages
- 33,613
- Reaction score
- 1,057
- Points
- 113
- Location
- Cave Creek, Arizona
- Website
- www.terrylove.com
caulk
The sealing is to prevent water from going under the toilet, not to keep sewer gas or leakage from coming out.
The sealing is to prevent water from going under the toilet, not to keep sewer gas or leakage from coming out.
WallyGater
New Member
the plumber that set the toilet upstairs actually dumped plaster of Paris on the finished tile floor, then set the toilet on top of the plaster. I still had to caulk around it anyway. He said its the best way to set a toilet, and that's the old fashion way to do it. From the replies on this topic it sounds like no one ever heard of such a thing, and or never does this anymore.
Using grout would be the closest thing to plaster which I have never heard of but doesn't surprise me...One of the things that I do run into from time to time is plumbers putty used in place of a wax ring...not a good thing but from what I can tell was used by a few plumbers years back...
Kingsotall
Plunger/TurdPuncher
Verdeboy
In the Trades
- Messages
- 2,041
- Reaction score
- 6
- Points
- 0
Craig99
New Member
- Messages
- 14
- Reaction score
- 0
- Points
- 0
When I added a bathroom in Cypress, CA, Inspector would not pass toilet until it was caulked. He said it was to prevent sewer gases. I just installed a Guinevere. The Unifit makes it real simple to make sure you get a nice seal without worrying about the toilet messing it up. Good rim wash and excellent flush so far.
99k
Radon Contractor and Water Treatment
I had an inspector that would not issue a CO until the entire base of the commode was caulked ... to prevent water seepage when mopping, etc.
Jadnashua
Retired Defense Industry Engineer xxx
If you have sewer gasses leaking from a toilet, it is because the wax seal is bad...you could cover it up with caulk around the toilet, but that wouldn't fix it...and, you might find the toilet in the room below after it rotted out the floor.
MaintenanceGuy
In the Trades
Exactly my point. In my opinion, caulking around the toilet base can hide a problem until real damage is done. I still think that the down side of caulking outweights the upside.
Jadnashua
Retired Defense Industry Engineer xxx
On a properly installed toilet, never.
GabeS
Remodel Contractor
A lot of people use the plaster of paris. I hear about it all the time but never used it myself. The toilet should not rock. The tile floor should be flat and level and then when you put the toilet it should not rock at all. If it rocks, then that means the floor is not level and flat.
Good point about the caulking not allowing water or spilled urine under the toilet. If the toilet leaks that caulk will probably bubble up.
Good point about the caulking not allowing water or spilled urine under the toilet. If the toilet leaks that caulk will probably bubble up.
