As I'm about to insulate the loft space itself I'd like to fix and increase the insulation on the dwarf walls as well. But, what would be the cheapest and easiest way to get it done?
The current insulation is held in place by what appears to be heavy black paper stapled to the studs. If I want to make the insulation thicker, that's not going to work.
My two ideas are: 1. Cut down sheets of foam insulation and screw those to the studs. 2. Use some long screws to hold rockwool vertically in place, may be with an few square inches of wood to act as washers.
Frankly given the confined space, I don't much fancy either of them! Does anyone have any better suggestions?