Just bought a Polytunnel is it worth erecting before Spring?

[Bigmallly]

Yes, I've seen that done AP with debris netting fastened to the inside so when the window is open, unwanted pests can't get in .

[Vinny1964]

That's effectively what I have on mine BM except I made and fitted hinged polythene covered lights which can be opened easily on the fine days and closed when it is cold

That sounds ideal, did you hinge the window to open up I'd hinge on top or sideways and roughly how long did you make each window?

[Aberdeenplotter]

Each light is 2.4m long with three hinges along the top.