The roof slopes towards North, which limits solar gain a bit, but yes it does get rather warm.
I may cover the roof in white canvas during the summer, removing this in the winter.

The concrete base was cast on an existing hard surfaced area, no additional foundations being considered to be needed.

We do get frost here, but not severe enough to cause damage in most cases.

The total cost for having it built, not DIY was £2,700.