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Nick K 08-24-2007 10:53 AM

Need some help
I'm putting down tile floor in a bathroom, I had to remove 1/4" sub floor and those stick down tile. I'm using 1/4" hardibacker board and 1/4" tile. Do I need to adjust the height of the toilet flange?

Nick K 08-24-2007 10:58 AM

the hardibacker board went under the flange fine and there is still a little play. And it is a outside glued flange to abs plastic pipe. The flange has a small amount of rust but nothing that bad.

Ron The Plumber 08-24-2007 11:32 AM

Should be fine, use extra wax is the toilet sets low into the floor.

Nick K 08-24-2007 11:38 AM

So do I tile around the flange or do I put the tile under the flange?

Ron The Plumber 08-24-2007 11:44 AM

Tile under if you can

Nick K 08-24-2007 11:53 AM

I think that I have enough room but how would I screw the flange down if I have the tile under the flange? Could I get away with leaving the flange on the hardibacker subfloor and using a larger wax ring?

Marlin 08-24-2007 04:27 PM

Ideally you want the flange on top of the floor. You can put it on your mud/cement floor, you may have to use two wax rings though (one with a horn and one without on top of it).
The two things you have to make sure of though is that the flange is sitting firmly on whatever floor you have it on and that it is screwed down. If you put tile under it you need to drill holes with a hammer drill or diamond drill bit and then screw it down.
I don't think this applies to you but if you have thick mud and can't reach the sub-floor or are on a slab you have to drill holes with a hammer drill and use concrete anchors which look and work just like Sheetrock anchors (they are not interchangeable though).

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