How to improve existing insulation
Our exterior walls are very cold to the touch -- even after adding insulation behind wall outlets. When I redid my bathroom, I saw pink fiberglass insulation in the exterior wall, so I think we must have it everywhere. Our house is about 30 years old; we've had no water issues, and no reason to think the fiberglass insulation has been somehow damaged. But clearly it isn't doing the job any more.
The only thought I had was to open up interior walls and redo, but that just seems like such a waste. Our exterior siding is in great shape, so it seems pulling that off to add insulation would also be a shame. Any thoughts?