No, the 1" space is between the wood and the foam board. The foam glues directly to the concrete wall. It's in the article I left, towards the bottom. I would slip some 6"sticky window tape behind the studs - vertically, center stuck to the stud and ends stuck to the foam board cut to fit in stud bays. So you seal gaps between foam boards on the other side of board.
Be safe, Gary
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!