Is this drywall, what's under it?

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  #1  
Old 03-01-18, 04:06 PM
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Is this drywall, what's under it?

I have a spiral staircase leading up to a loft. There is cracking as pictured. I dug in and found what appears to be metal under what I assumed was drywall. I can't find any tape. Seems like there is a metal screw or bolt at one point. The last pic isn't clear but it's metal under the drywall. The metal doesn't hold the staircase. What is going on here? What would be the fix for the cracking?
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  #2  
Old 03-01-18, 04:09 PM
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That's metal corner bead. It's used on every drywall corner.
 
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Old 03-01-18, 04:19 PM
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Yep, corner bead. The cracking I have found many times is from lack of sufficient nails or nails poorly driven in. But movement is what is causing the cracking. Is there bounce in the floor in that area?
 
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Old 03-01-18, 05:23 PM
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I live 100' or so from an interstate, you can feel the house shake at times, maybe that's a factor.
 
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Old 03-02-18, 02:32 AM
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The fix would be to scrape off any loose mud, make sure the cornerbead is secure [add more nails if needed] and apply joint compound as needed. Sometimes it's beneficial to use drywall tape over the edge of the cornerbead.
 
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Old 03-02-18, 05:28 AM
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I would rip off the bead... mainly because it's already been filled so taping it now would build it out beyond the metal corner. And I would use a paper tape metal corner in its place. You mud the corner, press the paper tape metal corner into place, the wipe it down tight. Once it's dry, you coat it 2 or 3x like normal.

The paper tape corners are less likely to crack like that, imo.
 
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Old 03-09-18, 01:05 PM
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I decided to stick with the original bead. I chipped everything away and taped over the bead where it meets the drywall and then applied several coats of mud. I'm left with a bit of the bead showing in spots because the knife rubs up on it and the mud won't stick. Is this alright?
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Old 03-09-18, 01:08 PM
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It's normal for the edge of the bead to not have mud covering it but something doesn't look right in your pic. The edge of the corner bead should be flush with each side of the wall.
 
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Old 03-09-18, 01:16 PM
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You use the corner bead as a guide and drag your knife with one of the sides of the knife riding on the bead, instead of trying to mud up to the edged of the bead. Hopefully you pounded the nails of the bead further in to tighten things up.
 
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Old 03-09-18, 01:36 PM
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What type of mud did you use for the 1st coat?
 
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Old 03-09-18, 03:17 PM
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I used the ultra lightweight premixed stuff from HD. I actually thinned it out with water as I find it goes on really thick and is hard to deal with otherwise, you end up with a lot of bubbles/pocks.
As far as something not looking right, maybe it was the angle of the photo, I'm looking up at the patch.
Here's a shot from further back.
 
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Old 03-10-18, 03:03 AM
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What doesn't look right is the small gap at the end of the wall. As Z stated you use the cornerbead as a guide. It's only the very edge that doesn't get covered with mud.
 
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Old 03-12-18, 11:32 AM
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does this look any better?
 
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Old 03-12-18, 11:37 AM
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That needs another coat of mud, sanding and texture.
 
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Old 03-12-18, 11:38 AM
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I would lightly sand it and skim coat it again. Sand again if needed to remove any imperfections, then prime and paint.
 
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Old 03-12-18, 12:44 PM
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OK, thanks a lot for the help!
 
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