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Old 08-13-2010, 05:47 PM   #1
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What type of topping compound to use in bathroom?


I'm done putting up new drywall in my bathroom. I have hardi-backer around the tub and greenboard throughout the rest of the bathroom. My question is this - what type of joint/topping compound should I use where the hardi-backer and the greenboard meet up? Can I use regular topping compound?

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Old 08-13-2010, 08:20 PM   #2
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What type of topping compound to use in bathroom?


isn't the hardi going to have tile over it? if so you would use paintable caulk between the sheetrock and hardi. i actually said this funny since the tile doesn't effect it, you just don't use gypsum or plaster on hardi. it's a crack waiting to happen


Last edited by racebum; 08-14-2010 at 04:45 AM.
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Old 08-14-2010, 06:34 AM   #3
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What type of topping compound to use in bathroom?


If the Hadri/drywall seam is covered by tile--then that seam should be covered with tile mesh tape and filled with thinset AS you set the tiles--unless you are using a paint on water proofing.

If you are using a paint on water proofer the seams must be meshed and filled with thinset before painting on the water proofer.-

As always--read the directions that come with the products-----Mike----
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Old 08-15-2010, 11:17 AM   #4
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What type of topping compound to use in bathroom?


Sorry - I should have added that I'm going to paint where the edges meet. I wasn't sure if I was going to do paint or tile where the two different boards meet. But now that the drywall is up, I see that I would have to run the tile out almost a foot beyond the tub. And since it's a small bathroom I think that would look odd to have the tile extend so far into the room.

The problem is that although the hardi-backer and greenboard are supposed to be the same thickness, they're not. So I'll likely have to do a few layers of coating and a good bit of feathering. And that's not my forte!!

(My forte is starting sentences with conjunctions)
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Old 08-15-2010, 02:27 PM   #5
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What type of topping compound to use in bathroom?


how finished is the drywall?. if you can still loosen the screws do so and shim the entire board to the height you require.
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