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Unread 08-14-2006, 09:25 AM   #1
mikeln
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Question Finishing Non-tiled CBU

Tried searching...but didn't find this info...

What is the recommended finishing technique for CBU (Hardibacker) that is not tiled? I have an 18" strip above my tiled shower. I'm not very worried about water damage up there. I would like to prime and paint this area. What surface prep is needed?

1) skim coat with thinset
2) skim coat with drywall compound
3) no skim coat
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Unread 08-14-2006, 09:33 AM   #2
jdm
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If you want it to be as smooth as drywall, skim it with drywall compound. You might consider the setting type (dry powder that you mix with water), as once hard it will not soften with water as easily as the drying (premixed) type does.

Finish it with a good-quality primer and two coats of good paint.
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Unread 08-18-2006, 07:45 AM   #3
Kenny
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paint type

Above a shower head, should oil paint (or a Kilz product) or latex be used on sheetrock?
I have roofing felt behind Hardi all the way to the ceiling and using oil paint seems like it might trap any moisture that gets behind the Hardi between the roofing felt and the oil paint, whereas latex would presumably allow any water vapor to migrate.
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Unread 08-18-2006, 06:23 PM   #4
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bump.
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Unread 08-18-2006, 09:40 PM   #5
koihito
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As Jeff said, finish it just like drywall. A good quality latex should be fine. I painted mine with latex four years ago and I take long hot showers that make a lot of steam; no problems. It's all about the prep.
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Unread 08-18-2006, 09:43 PM   #6
keastman
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I've used latex with a good primer on few that I've done and haven't had any problems. You could't pay me to use oil paints.
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