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Thunderbird_ESQ 09-25-2011 06:02 PM

Bathroom tile around around old flange on subfloor
I have pulled up the linoleum floor in a small bathroom and plan to lay down tile. The subfloor is 3/4" plywood, and I intend to lay down 1/2" backer board and tile over that with 3/8" tile. The cast iron toilet flange is screwed on flush to the plywood subfloor. Can I leave it in place, and place the backer board and tile around it, and use extension and/or thick wax ring? Given that the flange is 1/4" thick, the finished tile floor would lie 1" above the height of the flange (if my thinset estimations are correct...

1)Are my estimations for thinset correct?

2)Can I get away with 1/4" backer board? (this would help with threshold issues too, since I'll be 1 3/16" above the halway wood floors if I use the 1/2" backer...)

3)Is it OK to have the toilet flange 1" below the finished floor?

Tile: 3/8"
Thinset: 1/4" (?)
Backer: 1/2"
Thinset: 1/8" (?)
Subfloor: 3/4"

Stable subfloor=1.25" with 1/2 backer; and 1" with 1/4" backer...
Thank you!

oh'mike 09-25-2011 06:13 PM

Use 1/4" backer board set into a bed of thinset and nailed or screwed---

Flange extenders are available as well as jumbo extension wax rings.

Thunderbird_ESQ 09-25-2011 06:22 PM

Thanks oh'mike-
I'm in CT, I updated it, thanks for the tip!

oh'mike 09-25-2011 06:50 PM

Look through the tiling section here----lots of folks doing bath floors.

Here is one link that will help"Mud" What Is It? - Kitchen & Bath Remodeling - DIY Chatroom - DIY Home Improvement Forum

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