Last July, we had a company come out and blow insulation into the cavities of the exterior walls...
We've seen the issue for a while, but have been ignoring it, but now I am working on one of the rooms and would like to remedy it.
Basically, house was built in 1974. Drywall was secured (properly) around exterior edges, and only glued throughout the center studs. Naturally, that glue bond has deteriorated, so when the insulation was blown in, the drywall bowed. In some cases not so much, but on longer spans, I would estimate up to 2-3 inches.
Is there anyway to resolve this without tearing out the drywall completely?
I have tried a 2x4 down the length of a few studs, secured in with 4" decking screws, but the boad ultimately just bends and follows the contour of the wall.