I just built a polytunnel with pvc pipes and special greenhouse film. This film has an inside and an outside.
I'm pretty sure the text on the film that says 'inside' was facing the correct way when I installed it, however, I'm now second guessing myself and wondering if there is an easy way to tell inside from outside by looking at the plastic (at a glance the plastic looks similar on both sides)? The text saying 'inside' is now buried somewhere in the soil so I can't reference that easily.
Also what are the likely effects of putting the film on the wrong way around?