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Unread 09-24-2016, 08:21 AM   #1
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Tile over painted brick

Looking for advice on tiling over a painted brick fireplace. A contractor friend said that if the paint is not peeling off, you can tile directly over it without issue. I remain skeptical and think that something like Mapei Prim Grip or hardibacker is better albeit a lot more work. Are there mortars that will bond to painted brick reliably? Do I need to put in the extra effort?
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Unread 09-24-2016, 08:54 AM   #2
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I highly doubt any manufacturer would sanction thinset over paint.

Eco Prim grip would save the day, but I'd still want to do a test tile first to see if I could yank it off after a week.

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Unread 09-24-2016, 12:04 PM   #3
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I'd screw lath to the brick and mud it but your contractor may be scared of that. Getting the surface flat will make the tiling easier and will look better in the end.

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Unread 09-24-2016, 12:31 PM   #4
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Anything you bond will only be as strong as the paint bond.
I asked mapei the same question a couple years ago about eco prime and that was the response I got.
I ground the paint off.
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Unread 09-24-2016, 06:29 PM   #5
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I second screwing lathe directly to the painted brick, scratch coat it and then mud it plumb and flat. This will make the tile installation beautiful (if executed correctly) and last a lifetime.

Other option would grind off the paint, but this could get very messy if the incorrect equipment is used. If this method is the one chosen, a grinder with a vacuum shroud must be used to contain the dust.

I would not, under any circumstance, bond the tile directly to the painted brick. This would be a setup for failure.
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