help maintain a 2 leaf wall system

Hi, I have run into a problem while trying to maintain the integrity of a 2 leaf mass air mass wall construction in the control room of my studio build… The Problem… Here is the wall in question You are looking up the stairs which lead to the entrance to the Control Room The wall is a 12" thick cavity concrete block wall, photo below Both leafs of the wall (4" blocks) are connected with steel wall ties inserted during construction. I have be told on this forum that this connection essentially makes the whole cavity wall one leaf. The builder who built this wall did so after a gallon of whiskey because it is vertically going inwards by about 3" towards the top( it is visually noticable) I have studded out the exterior of the wall so its vertically correct, the arrows in the photo show the discrepancy... The inner leaf of this wall construction is inside the control room, it is wooden studs onto which i will place layers of drywall, heres the photo My Question... If I put drywall straight onto the studs I am going to create a 3rd leaf which is not good, am i forced to plaster/ render the wall flat to the level of the studs and then put the drywall up? Or do i have any other options that anyone can think of which would enable me to maintain the 2 leaf wall system? here are a few more shots and as always any advise very welcome Regards hally

WOW! 3" lean? It must have been a Chilean craftsman who built that wall! :) Anyway, this is just the wall up the side of the stairwell, right? The problem side is not actually inside your studio? Where you have those studs is the outside surface of your outer leaf, right? If so, then do you really need those studs? Would it not just be easier to plaster that wall back out to vertical WITHOUT the studs there? With a 3" difference to take care of, I guess you'll need some kind of wire mesh to get the shape and grip for the mortar, but it seems to me that it would be better in the long run to use plaster to build it back out to plumb, and use that plaster surface as your final finish surface, instead of sheetrock on studs. Just one suggestion. But the best guy to help you with that is probably Brien (xSpace). - Stuart -

Thanks Stuart, Could u see any problem structurally adding the extra weight of the render to the wall (an already dodgy inward leaning drunken wall)

Anyway, this is just the wall up the side of the stairwell, right? The problem side is not actually inside your studio? Where you have those studs is the outside surface of your outer leaf, right?

This is all correct thanks hally

If you are concerned about the structural integrity of the wall, then I'd really, really suggest that you hire a structural engineer to look at it. ( I was kind of thinking that if it's already unsound, then maybe all that mortar would make it STRONGER, anyway, not weaker! ). One other question: Is that a load-bearing wall? Or is it just a divider wall? If it is not doing anything useful structurally, and poses a danger due to the "drunken-lean", then another option might be to just knock it out, and replace it with a proper two-leaf stud wall... Spending a few days knocking it out might actually be easier than trying to patch it up. But for that kind of issue, I think you'd be far better off getting some professional advice from someone who can actually go in there and inspect it properly. I wouldn't rely on a few comments made about photos on a in internet forum, for that kind of thing. - Stuart -