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-   -   What type of topping compound to use in bathroom? (http://www.diychatroom.com/f101/what-type-topping-compound-use-bathroom-78707/)

spaceman spif 08-13-2010 05:47 PM

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?

racebum 08-13-2010 08:20 PM

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

oh'mike 08-14-2010 06:34 AM

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----

spaceman spif 08-15-2010 11:17 AM

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)

racebum 08-15-2010 02:27 PM

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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