Retrofitting internal wall insulation
Does anyone have any strategies retrofitting wall insulation in an internal wall? I'm looking to add insulation to a single wall which is shared between two bedrooms, primary reason is to reduce noise transmission between the two rooms. It's 10mm gyprock on each side with a 90mm gap inbetween.
I've looked at stripping out the plasterboard on one side and fitting thicker plasterboard with resilient clips, however I don't have the budget or enough space in the room to allow for this.
I'm thinking of just cutting some neat holes between the frame and slipping in the insulation. I would then patch up the holes. The idea would be not to touch the archs or cornices. There is no power running in this wall so no issues there.
Has anyone done anything similar? Is this worthwhile or more trouble then it's worth?