Well, I've got the see-through tarp and attached it with cord via the eyelets. Not found any bungees suitable yet but I'll keep looking. I think we have some in OH's car. I don't need bungees on the see-through tarp as it's heavy! The thinnest tarp came via the army stores I think and that does flap, hence drawing a bungee across it to stop it
The tarp is really transparent thank goodness so chooks can see out and it lets light through really well. Keeps the wet off them chooks and the Hemcore though which was the object of the exercise. The entire run has a roof but some of the sides are still uncovered to let some draught air in
I'll upload a picture in due course