Next summer I'll be moving and setting up my shop in the basement under my home in upstate NY and I'm trying to plan out how I'm going to insulate it.
The basement has a concrete slab floor, with quality cinder block walls up to the 8' height of the room, it's water tight and will be kept at around 60 degrees in the winter, with no conditioning in the summer. It is surrounded by earth on 3 sides (frost line is about 5', so around the basement floor if that matters), and has a normal door and a garage door on the downhill side. There's no risk of water coming in through the door due to the slope of the driveway
My basic idea is that I'll lay 2x4s face down on 16" centers on the floor, insulate between them with ridgid foam and put a hardwood floor over that. For the walls, I'll do the same (2X4s probably on edge, not flat though).
Is ridgid foam my smartest option for the walls, or should I just use regular fiberglass? I assume it's my only option for the floor.
Do I need a vapor barrier over the concrete on the floor? On the walls? Is it a better option to use one of the painted on barriers or lay down an actual sheet of something?
Thanks,
Andy