We have very large (3m) free standing wardrobes in our bedroom. They had to go against an external wall due chimney breasts, windows, doors etc on other walls. We left a small gap and there are a couple of air bricks on that wall. They are still quite damp inside. I fill them with those dehumidifier packs which definitely help but is there anything more I can do?
They are way too big for me to move, but I bet if I could the wall behind them would be mouldy. Is there some kind of sheets of insulation I could see if I could slip behind them in the small gap?