Hi, I've been a bit of a plank and installed our washing machine in our garage. Fantastic untill we entered the prolonged cold spell and now the garege has gone below 0 deg C my washer has frozen up. So I want to insulate the outer wall which is single skin brick. Do I need to get involved with damp proofing and breather membrains? Or can I just batten out and fill with king span or somehting like that?