XPS vs. Closed cell spray foam
We are still in the planning stages of our basement finishing project. We are in the process of comparing insulation options. We are vacillating between XPS applied directly to the concrete walls (1"or 2"?) vs. professional application of closed cell spray foam. On the surface it appears that the spray foam might be better but it is more expensive and I don't want to overspend for something that doesn't truly offer an appreciable improvement in insulation values and thereby comfort and energy efficiency.
Is the spray foam appreciably better in insulating than XPS or is it just more expensive? We are willing to spend the money doing things the best way but don't want to throw money away either.