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hurtman 02-04-2013 09:23 PM

Transition from hardiebacker to sheetrock
I'm tiling the tub area where I just installed a new tub with a tiling flange. The tub instructions call for putting 1/4 inch furring strips down the studs that the backer board will be installed on. This will make for a smooth transition over the tiling flange. My question is how to make up for the 1/4 inch where the backer board will meet sheetrock (that doesn't have a 1/4 inch furring strip behind it)?

michaelcherr 02-04-2013 09:55 PM

I've never shimmed out my backer board like that. If i did, I'd put the same thing behind the sheetrock to make it even.

joecaption 02-05-2013 01:19 AM

You have to shim the whole stud not just where the backer board goes.

hurtman 02-05-2013 06:16 AM

I'm tiling up to the ceiling so I'll have backerboard all the way up the stud. My transition will be a vertical joint where the backerboard will meet the sheet rock that was installed years ago during construction.

oh'mike 02-05-2013 06:29 AM

How thick is the tub flange---????
Usually , the 1/2" backer rests on the top of the flange and does not cover it---then that void is filled with thinset as the tile is installed.

If the walls are to be waterproofed before tiling---the void would be filled with thinset before the waterproofing is applied.

AS others have said----if you furr out any part of the wall, you must furr it all--
Tile requires a flat surface or the tile edged will 'lip' badly and you will hate it.

hurtman 02-05-2013 08:23 AM

Here's a link to the instructions for this tub:

This shows the furring strips coming down to the tile flange and then the backerboard going over the flange. This is my first tub working with a tiling flange. Is this unique to tubs with tiling flanges?

oh'mike 02-05-2013 09:17 AM

If you do as I suggested--stop the board above the flange and fill that gap with thinset--you will be fine---

Furring the wall is fine if you don't have to have the tub area board meet the drywall that is against the studs----those instructions sure weren't written by a person that actually installs these in the field.

His instructions are flawed---not addressing conditions found in real world construction.

hurtman 02-05-2013 10:39 AM

Thanks oh'mike. I'll do as you suggested.

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