Eh... I don't like the pump air idea.I am contemplating ordering 100 foot long instead of for a 36 foot long plastic sheet to double over and give extra insulation. What do you all recommend? How to keep the sheets separate, Pump air inbetween doubled over sheets?
I have always thought if I redid my greenhouse I would have a solid well insulated roof. Walls whatever I could afford... plastic sheeting or whatever.
Good luck.
Fun and exciting and stressful. Hope it turns out like you want it.