Hello Bigbird,
To keep the van warmer and stop condensation we have tried to insulate the walls and roof. For the roof Kath used a cotton bed sheet, this is fixed to the roof in the centre and each side with velcro. This method of traping a layer of air is used in trailer tents etc. The fluffy part was sewn to the sheet and the hooky part was fixed to the roof with no-nails. Last year we camped in the snow at Easter and was very cosy but we was on hook-up with our little heater on.
Regards
Len
