The temperature is still not very mild, is quite cold. But I decided that I need to make some progress with the campervan conversion, and so I did continue with working on the insulation. Added more alu-bubble-wrap foil in the parts where it still had been missing.
After most of the metal parts were covered by this aluminium foil with its air bubbles, the next step was to add a layer of thick sheep wool insulation.
Then the final layer of polyethylen foil was added, covering the wool layer, to keep the moisture out.