Since the partitions are up I’m installing the insulation. I’ve found Reflectix (registered company) Insulating Material with is ideal for a construct in this way. With it being against concrete it’s mould and mildew-resistant. It increases with simple without any requirement for protective garments or itchy partials. It is perhaps not going to be lebensraum and looks perfect for my program. I got it at Home Depot for /package. .