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BradG 12-17-2007 08:48 PM

Any sort of footing material to put under toilet?
Wondering if there's any sort of pre-fab material for use between a toilet and flooring to keep the bowl from shifting.

After replacing the tile floor in my bathroom I found the toilet flange to be sitting too high by about a quarter inch. I had removed quite a bit of concrete with the old tile but had replaced it with both new cement and cement board so hadn't expected this problem.

As my building is a high-rise and everything (including the walls) is cement/brick there was really no option to lower the flange so I cut some extra floor tile (I had used 12" black marble tile which was just the right thickness) to fit between the toilet and floor. I've been advised to use plaster between the toilet and my little "riser" when I install it but I'm just wondering if that's the best option or if there might not be another option for keeping the toilet firmly in place?

Marlin 12-17-2007 08:53 PM

How high is your flange? It should sit directly on top of the finished floor.

Obviously, you're going to have to somehow first secure your riser to the floor somehow. Once that is done if the surface is level just put your toilet down. If it isn't level then use plaster and don't use the bowl for 24 hours.

BradG 12-18-2007 06:35 AM


Originally Posted by Marlin (Post 81437)
How high is your flange? It should sit directly on top of the finished floor.

Yeah, I think it was a little high even before I ripped out all the concrete and tile. Maybe that's why there was so much friggin' concrete under the original tile, because they installed the flange too high. My riser is level. I thought that the plaster was probably just extra insurance and to maybe keep the bowl from moving sideways.

Mike Swearingen 12-18-2007 08:59 AM

There also are beveled plastic shims for leveling toilets that might help. As advised, a toilet wax ring seals best when the toilet flange is sitting flush on top of the finished floor level with only the thickness of the flange above finished floor level. The flange should be bolted to the floor and the toilet then bolted to the flange. If it's too high and you can't lower the flange, then you have to build-up and shim around the edge of the toilet base.
When you finish, the toilet should sit solidly on the floor and not move at all. Do not over-tighten the toielt base bolts, or you might crack the porcelain.
For drilling for Tapcons or anchors in concrete and tile, use a starter tap point to keep the drill from skipping and use a masonry bit for drilling.
Good Luck!

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