Starkeeper,
I'm insulating for heat reasons. The room I'm using is in a finished basment. Two of the four walls have concrete block behind them It's nice and quiet in that room. I will probably buy some type of outer wall insulation though for studio use.

Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.