I need some extra storage space and am wondering if I can obtain a completely sealed walk-in sized plastic 'shed' that can live in a garden but keep the contents completely dry through a sealed doorway. I need something sized about 1.5x2x2m
I am even thinking of plumbing in a dehumidifier using waterproof cable/pipe glands so that he contents; fabrics, electrical items etc will have no chance of becoming rusty or mouldy.
Can anyone suggest where I might get a plastic construction like this?