Greenhouse: Bubble Wrap the Greenhouse for Insulation, 1 by AZgrammie

AZgrammie wrote:
My 6x8 greenhouse is made of corrugated polycarbonate sheets from HD, lined with bubble wrap from Staples (free delivery). The frame is steel, from a DIY camper an old-timer was trying to make but he passed away. My son brought the frame out to me and helped me turn it into a nifty little gh. The north side & north slope of the roof are plywood, insulated with rigid foam. Because the frame is metal, I couldn't use tacks or nails to secure the bubble wrap, so used clear packaging tape and duct tape. The duct tape came off after about 5 weeks, but the clear tape is still holding. I bought a roll of super heat/cold resistant duct tape and have used that but also bought rolls of clear tape in case the h/c duct tape doesn't hold. Anyway, I started out using a 12Vdc auto blanket (connected to old solar panels & batteries) but the blanket died! I have been filling milk & fruit juice bottles with water and so far it seems to be working perfectly even without the blanket. We have had temps down to 10 or 15 outside but inside the gh, it hasn't been below 45. This is since about mid January, when the gh was completed. I have my geraniums out there, a dwarf fig tree, and two grow-tubs with lettuce (big enough to start picking now) and some tomatoes that will be big enough to set out in the garden in a month or so. I am delighted with the whole thing. I guess the combination of the bubble wrap and the water bottles are doing their job.