Our hangar (covered with foam insulated double metal skinned panels from a dismantled hangar from nearby military base) is lined with wood shuttering, originally for security as it used to be clad with corrugated iron which got prised open for break ins.
It does however have a gap all round the tops of the walls and the sliding doors which ventilate it well.
There is never any condensation though in stonking winds some rain can get in on the nose of the a/c- for this reason we keep a Cambrai cover on the nose/cabin.
We're fortunate to have mains electricity so with a small dehumidifier and cabinet heater in the cabin the a/c smells as fresh as a daisy with no damp smells and avionics problems which were rife before we got the leccy across the farm fields.
The key however is free ventilation.