Many years ago I bought a 4Ground large shed. It spent a long time in my MDF pile. I then built it, but decided it needed to be clad in corrugated iron (Slaters embossed plastikard).
The line of bolts are actually drilled into the frame of the building.
A couple of Corporation Exploration Team members investigate.A rubbish bag, an old mattress and a tyre adorn the roof.