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Old 02-13-2014, 02:45 PM   #1
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Hardibacker over plaster wall - Help!


Updating 1958 bath. Tile and it's concrete/metal lath base removed. Rock lath in great shape. Questions are...

Can I attach Hardibacker/thinset over the plaster?

The HB screws are 1 1/4" long. The wall thickness, about an 1", plus the 1/4" HB, will mean the screws are not going into the studs, only the plaster. This OK?

Thanks....Bart

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Old 02-13-2014, 03:24 PM   #2
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Hardibacker over plaster wall - Help!


I'd use this instead.
http://www.schluter.com/6_1_ditra.aspx

Tile board is not water proof and may effect the old plaster.

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Old 02-13-2014, 05:39 PM   #3
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Hardibacker over plaster wall - Help!


Is this for the walls or floor?

Ditra is a great product for floors, but I believe Kerdi is meant for showers / tubs. And it is supposed to be installed over sheetrock IIRC.
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Old 02-13-2014, 06:42 PM   #4
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Hardibacker over plaster wall - Help!


Quote:
Originally Posted by spta97 View Post
Is this for the walls or floor?

Ditra is a great product for floors, but I believe Kerdi is meant for showers / tubs. And it is supposed to be installed over sheetrock IIRC.

For the walls.......
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Old 02-13-2014, 07:56 PM   #5
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Hardibacker over plaster wall - Help!


Kerdi is a water PROOF material that is commonly used in showers over most any backer board. There are some good install videos on you tube. But to make the shower water proof and worry free you need the whole kit. This includes corners and banding. Ditra the waffle looking one is usually used for floors.
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Old 02-13-2014, 10:19 PM   #6
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Hardibacker over plaster wall - Help!


Kerdi can be a PITA and I avoid it. There are lots of easier ways to do it. Do some research before you commit.
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Old 02-13-2014, 11:09 PM   #7
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Hardibacker over plaster wall - Help!


Opp's, my bad I hit the wrong web site ToolSeeker.
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Old 02-14-2014, 04:28 PM   #8
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Hardibacker over plaster wall - Help!


Thanks for the ideas; however, I decided to take all down to the studs. So far, not too dusty and not that difficult except for the metal lath areas which are sort of a pain.

Bart
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Old 02-14-2014, 05:40 PM   #9
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Hardibacker over plaster wall - Help!


I think in the end you will be glad you did it this way.
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Old 02-14-2014, 07:42 PM   #10
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Hardibacker over plaster wall - Help!


Going to have check the studs with a string pulled tight to see how flat they are and shim them out to make up for thickness of the old wall covering.

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