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
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17,000 dryer fires a year, when did you last clean the inside of the dryer near motor or the exhaust ducting?