Is 50mm Rock Wool Enough for a Nordic Winter Van

I installed rock wool on the walls and felt on the metal surfaces. I covered the wires for the lights and put some wire for the fan. The song Cylinder Five and Three by Chris Zabriskie is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/... Source: http://chriszabriskie.com/cylinders/ Artist: http://chriszabriskie.com/