Back Doors and Flapping

We fitted back doors to the polytunnel but they got blown off again.

We've also found that the tension of the plastic pulling against the door frames has caused them to twist allowing the plastic to become loose so that it flaps in the wind and makes my erection look a bit sloppy... not a good story. The problem is that the ground is so wet and muddy that everything is moving, we might have to concrete the door frames in place come the summer when things are a little drier.