We checked inside the RV this morning after a heavy downpour of rain yesterday, and we are happy to say there were no water leaks at all.
The solar panel gland was sealed solid to the rubber roof membrane. Both roof vents were prefect, no signs of wetness at all. Plus the areas where we have used fibreglass are all leak free !
Given the amount of rain that fell, we can be very confident in saying that we have turned what was a cullender into a water proof shell 🙂