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Unread 07-20-2021, 01:36 PM   #1
thedudemn
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Remove hardi board or not

So I'm re-tiling a small bathroom. I removed the tile by breaking the tile with a hammer. The underlayment is 1/2 hardi board. Do you guys remove it and install new underlayment or do you try to remove the thinset and patch any damage where the hardi board was damaged with some layers still attached to the removed tile.
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Unread 07-20-2021, 02:51 PM   #2
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Welcome back, Hue.

This in a shower wet area or outside the wet area?
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Unread 07-20-2021, 03:48 PM   #3
thedudemn
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Sorry, I should have made that clear. The dry area not the shower pan.
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Unread 07-20-2021, 04:27 PM   #4
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You can probably get away with patching the substrate, but I would always find it far more expedient to remove the wallboard, tile and all, to begin with and start over with new material unless it was just a very small patch job.

A photo or two of what you've got might be helpful.

My opinion; worth price charged.
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Unread 07-20-2021, 04:57 PM   #5
Tool Guy - Kg
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I took this to be the floor. Is this the wall or floor?

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Unread 07-20-2021, 05:29 PM   #6
thedudemn
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Floor
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Unread 07-20-2021, 05:48 PM   #7
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I didn't even consider floor after he said half-inch Hardi, Goldstein. Good catch.

Is there thinset mortar under the Hardibacker panels on the floor, Hue?

Again, photos of the damage would help. And more information is always better than keeping secrets, eh?

Is it screwed or nailed down?
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Unread 07-20-2021, 06:20 PM   #8
Davy
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If there's no thinset under the Hardi, I'd remove it.
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Unread 07-20-2021, 07:31 PM   #9
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I'd remove it either way. Really tough job to remove mortar without doing significant damage to the board, and if it starts delaminating, you could have a spongy spot that would allow vertical movement.
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Unread 07-20-2021, 11:21 PM   #10
thedudemn
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It's probably 1/4 underlayment not 1/2, . It's a 6'x3' floor. There's thinset underneath the hardi board.
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Unread 07-21-2021, 07:49 PM   #11
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You can try to remove the thinset but like Kevin said, the Hardi is easily damaged most of the time.
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