I bought a cabin a few years ago. All wood exterior and interior. It has a cement block basement that holds the hot water heater, holding tank for water and a drain for the pipes. There is insulation on the ceiling of the basement. The basement is a pain in the rear. It holds moisture and the mice build nest in the insulation. I'm working on adding more vents in the block and putting dry lock on the walls to fix the moisture problem. But I'm thinking about just pulling down the insulation, trying to fill any holes that the mice use to get in, and just not putting insulation back up. The insulation just holds moisture and the mice love it. They die in there and the basement stinks. I'm just wondering if anyone thinks this I is a bad idea and that I should always have insulation in the basement.