Sheetrock/Durock corner seam question

I am redoing my bathroom and learning as I go so naturally I now have some questions. I have an outside corner where my durok meets my sheetrock; I didn't think ahead and installed the sheet rock first then installed the durock flush with the face of sheetrock. This is for a tub surround that will get tile however this area will be out of the tub area by 12" and should't see water under regular use.

I think I can run my corner bead up this seam so I would have a nice edge to paint to, sound correct?

I used paper corner bead on the rest of the room, should I get plastic or metal for this?

Is it ok to use joint compound on this seam or should is use thinset?

Is durabond thinset? I did some reading and it sounds like durabond can be sanded/finsished like joint compound.

 

What paper corner bead did you use? did it have metal at the corner with paper on each side?

Usually the corner bead is applied over both the drywall and the cement board. I prefer metal bead but if you think there's a chance of rust - plastic might be better.

Durabond is a setting compound and isn't water soluble like regular joint compound. Durabond is used for drywall when a faster set time is needed. Thinset is a masonry type product.

 

I would wrap the corner with tile bullnose and forget about the corner bead. Will look more like you planned it and give the tile work a more "substantial" look. Use two pieces of bullnose offset by 1/2 the length. Have the main wall bullnose overlap the edge of the durock by the depth of the tile and marry it up with the flat end of the 2nd bullnose for a nice corner and finished bullnose on the short wall.

 

My paper corner bead has the metal. I thought about using the bull nose idea but I wasnt sure about putting it over the sheetrock, I thought the sheet rock would soak up the moisture in the mortar.

 

People do it all the time, not that is is correct, but you did good in that your main area is cement board. This will serve mainly as a decorative finish and not be functional nor subject to excess moisture. I usually overlap my last row such that the bullnose adheres to both the Cement board and the drywall. Kind of a split the difference and straddle both way to describe it. You should be fine with thinset on this small section of drywall. Don't do both cornerbead AND bullnose return as the cornerbead will distort the shape and cause the tile to sit crooked.