The cement sheeting reinforcement keeps it slightly cooler, which is good for summer. It is holding 28 degrees today, with an outside air temp of 12 degrees. Still gets cool at night- lowest recorded so far inside it is 5 degrees.@Ashburnham . I see you have a plastic covered greenhouse. That's what I've been looking at but more over just one bed. Do you find it warms enough to grow things out of season or do you still just grow winter crops?
I am using it to start off winter seedlings, but still have sweet potato and chillis growing in it.
xxxx M