What’s the best way to build a storage room in my basement?
Not much more money than sleepers but much easier are floor systems like Dricore. Plus you gain an inch or so of head room over sleepers. Despite the vapour barrier under the floor you should check for humidity from that source as practically all the under slab vapour barriers have punctures. The test is easy: Duct tape a 1 meter/yard square to the floor and wait a week or two. If you notice moisture under the plastic then you need to deal with the moisture in some way. If you don’t then a simple sealed/painted floor will be easier to keep clean and free of dust by sweeping than raw concrete. Drywall is preferred over OSB because it finishes better and easier. If you don’t care about nice smooth walls or you don’t mind the 70s wood panelling look then OSB is cheaper. On the exterior concrete walls, assuming you are still in Boston, I’d use foam safe construction adhesive to first attach 1/2″ extruded polystyrene insulation (blue/pink
