It is my opinion that the only way you can have condensation is when warm air meets cold air. It is dead air space (meaning air that cannot move) that insulates.
One way to create a dead air space is to have two sealed surfaces with a space between them.
That is how double pane windows work. both panes are sealed with a space between them. You can create that same effect with a sheet of plastic surrounding all sides and edges of something like Styrofoam. You can then cover that with any material you wish
Hope this helps