Drywalling Outside Corners

James Boyd

Just curious on outside corners, how far are you guys mudding? I mean if you finish with a 12" knife, it's a pretty big transition in height from the corner bead to the wallboard. Does anyone use a 2' knife to make a nicer transition?

James

IHI

Depends on how the rock was hung. I like to put the factory recessed butt joint for my corner so the corner bead itself is laid down into the reccess, so mud build up is minimal to come out flush with the rest of the wall.

Other than that, like a drywall buddy told me, mudding is basically smoke and mirrors. It's not the mudders job to get the wall perfectly flat, it's their job to make the wall appear perfectly flat.

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Tom R

I use an 18" knife for that when necessary, - - but bein's I'm usually doing my own framing (small scale), - - I 'lay-out' from the outside corners in, - - allowing the factory (tapered) edges on the corners (vertical drywall).

Makes for a much nicer job, - - not only as far as the spackling and overall 'flatness' of the walls, - - but all the way through to the base and the crown moldings.

Tom R

Damn, - - I gotta learn to type faster . . .

IHI

LOL, gotta love it!!

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AtlanticWBConst

We always have used 12" knives for both the 2nd and 3rd finish coat on those outside corners. As mentioned, it allows you to make the areas 'appear' smooth. Sometimes going back and doing a 4th coat 'touch up' also.

We have had outside corners in buildings where there was a large plate glass window near it 'shining' a "spotlight" of sunrays directly onto the surface, so EVERYTHING can be seen.
That is why we prefer making the corner blend in with a 12" knife. Not to mention that it helps the outside corners flow better into the walls for installing the baseboards around the corner.

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James Boyd

Start with the factory edge. Geez makes all the sense in the world.

Thanks

Paul Burns

Although I didn't major in drywallogy, after you make your down stroke with your whatever inch knife, go upwards at about a 45% angle along with your knife on the the metal edge to cut-off the exceess mud and you should end up pretty good.

Paul

Brushslingers

You run into problems with that technique in Florida, where it's against code to run sheetrock up and down, it's run sideways here... don't ask me. Sooooo... we use 12 inch to finish, can't have finished edges to stuff.

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James Boyd

Really? All drywall is horizontal? How about if two layers are used?

James

maj

Always horizontal in my area. I'm really surprised people put it up vertical. If it wasn't meant to be installed horizontal, then they wouldn't make 54" rock for 9' ceilings would they?

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slickfin

here where i am in tennessee it is laid down also. The only time it is stood up is on comerical jobs when it is getting a drop ceiling.

James Boyd

OK but what about if two layers are used? For soundproofing jobs, you need to make sure the seams of the first layer are covered by the second layer.

James