Twin wall polycarbonate - Question
As I'm doing my research on various greenhouses and what they include and don't include, I noticed the differences in the number associated with the manufacturers Twin Wall Polycarbonate. Some say 4mm, 6mm, 8mm and 10mm so far.
My understanding is that the higher the number, the more insulated the greenhouse is for growing plants in the winter months. If folks don't plan to grow anything in the coldest months where temps dips down to 0 degree F, would this really make a difference in their choice of which greenhouse is more suitable if all other construction, set-up,wind, snow load and warranty factors were equal?