Reply by SCOTSMAN

I had the same problem with my new metal storage shed ,then I was told to stick bubble wrap bought in big rolls to the underside of the ceiling.Now since then I have had no condensation problems. It doesn’t look too good but you could also fit a false ceiling with thin tongue and groove pine (treated) with insulation behind it.The problem comes when the hot air or water vapour inside your shop hits the cold steel and turns to water which drips down onto everything.Have fun. Alistair

-- excuse my typing as I have a form of parkinsons disease