I am considering finishing our walk out basement and wanted to get some advice on insulation. The walls currently are framed above the foundation walls and have fiberglass batt insulation between the studs and a vapour barrier. The foundation walls below the studs, have fiberglass insulation fastened with vapour barrier and strapping. We don't want a half wall, so we will be running new framing from floor to ceiling infront of the existing walls. So, I know I need to take the vapour barrier down and place it on the warm side of the new studs, but how do I handle the insultion? Should I leave what's there; remove it and replace with insulation between the new studs; or, leave the existing insulation AND add new insulation between the new studs? Thanks in advance!