Rowhouse homeowners: how are you insulating your second/top floor between your ceiling and the roof?
Just bought a place that is otherwise pretty nice, but the AC is always less-great on the 2nd floor. The thermostat is located on the 2nd floor and it's a new, properly-sized HVAC system, so I suspect inadequate or nonexistent insulation on the top is likely to blame.
My initial research suggested the best way to do this is a kind of insulation that goes under the roof, and requires a roof replacement. The roof is brand new, so I don't really want to do that.
Has anyone done something like this without ripping the roof off?