We've had a largish room dry-lined and skinned over the top of old plaster on stone-built walls.
The plasterboard is on wooden battens leaving a gap of around 0.5 to
1.0 inch depending.It may be my imagination, but the noise from next door seems to be amplified and certainly knocking on the wall from this side is a lot noisier. They're great neighbours who would just knock the volume down with no problems (he's a Jimi Hendrix fan) but I'd like to do something about it.
Is is feasible to inject something between the new plasterboard and old wall? Should that make a difference the noise (and thermal) insulation?