Take the 2-minute tour ×
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It's 100% free, no registration required.
             wall A
old wall ________________ edge of frame
new wall ________________| 
                         |
                         | Wall B
                         |

I recently floated a new wall over wall A which brought out the wall by about 3 1/2 inches. I am now about to put a second layer of drywall over wall B. Normally, you'd just screw the edge of the drywall into the frame of wall B, but, because wall A has come out further from the frame, I can't reach the edge of the frame so I can screw in the new drywall on wall B.

My first guess is to use a very long screw and drive it in diagonally so that it goes into the edge of the frame. However, do they make 4-5" drywall screws? I can't use adhesive on the drywall because I am using Green Glue between the layers. Green Glue is not so much an adhesive as is it a soundproofing compound. I've already installed the second layer and am just looking for a way to screw in the edge.

share|improve this question
add comment

1 Answer 1

up vote 8 down vote accepted

Unfortunately you are past the point where you could have installed a stud in that corner as a nailer. What you are saying is that you have unsupported drywall butting into the corner now. You certainly can try a longer screw, but be careful not to bend the drywall as the screw tightens. There is going to be a tendency for that corner to wave if you screw it to wall "B" diagonally. Can you still remove that piece of rock and put in even a small 1 1/2 X 1 1/2 nailer, then reinstall the drywall?

Regardless, use fiberglass tape in this corner if unsupported and the seam will have less tendency to crack. I can almost guarantee the corner will crack if you use paper tape.

I really think you should take the time to install a corner nailer now. It may take a couple of hours to fix the situation, but that is better than looking at a cracked, wavy corner after you have invested your time and money, knowing that you could have done right the first time.

share|improve this answer
3  
I may have misunderstood your question. Are you installing a second layer of rock directly over a first secured layer of rock with no air gap? If so, use some PL200 or other good construction adhesive in that corner between layers. put a few screws in just to hold the two layers together until glue dries, then remove the screws before you mud it. –  shirlock homes Dec 29 '11 at 11:22
    
As I stated, I cannot use adhesive between the existing layer of drywall and new layer because I am using Green Glue. Also, to install a nailer, I'd have had to remove the existing layer. I wouldn't have had a problem doing that had I known I'd encounter this issue. The second layer is already installed, so there's no going back now. Idea: Shouldn't there be plywood on the outside of the house beneath the siding? If so, a long enough screw should clear the frame and secure into the plywood, right? –  oscilatingcretin Dec 29 '11 at 17:16
    
if you try to hit the outside sheathing, the long screw will probably grab the insulation on the way through and wind it up into a ball. Maybe try some butterfly anchors (toggle bolts) and tighten the screw enough to countersink it into the rock so you can mud over it. –  shirlock homes Dec 29 '11 at 19:14
1  
Installing a nailer was the best solution. I took out a section of the wall spanning two studs, installed a nailer, and then reinstalled a double layer. I hated the fact that I wasted that Green Glue application, but it was only a small amount, I learned a valuable lesson, and I feel good about doing it right. –  oscilatingcretin Jan 12 '12 at 15:17
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.