Home made poly

[lottie dolly]

I am currently in deep thought about what design it will end up,my thoughts are,using what DH got from scrounging,it will be a wooden framework,i was wondering about a glass window each end for venting,with the doorway in the centre of the side,like a doormer door,so the tunnel remains the same shape,it will be sited east west,with doorway south facing,can any more experienced poly growers,see any flaws in my idea,the framework is not a problem,it will evolve as they say,plus we already done a small one,with good success,the windows will be a single glaze,aprox 4ft squ,also wooden,my thought are with,
A....will the glass windows interfere with the climate,i plan on using bubble wrap over windows in closed season to help with heat escape,the size will be finalised as and when we get some covering,thanks for looking

[Bren In Pots]

I think so long as those end glass windows open I don't think you'll have a problem.

[lottie dolly]

they do open,1 half opens,the other a little top 1,they are an old single glaze window,that have been stored in the dry,never used,