I'm in the process of building an office and family room in my basement and need some help with the walls and insulation.
There is a perimeter drain in the slab around the exterior walls that collects a small amount of water that weeps through the walls during the wet season. This perimeter drain will require me to place the studs about 4" from the wall.
In this scenario, with an airgap between the interior/exterior wall, should I use rigid foam insulation attached to the block wall, or traditional fiberglass insulation within the studs? Also, if fiberglass is used, should I include a vapor-barrier and on which side of the wall should it be placed?