[Spookyer (Brett)]

Hi all, about to start my obs build. With the roof I can see how overhanging the roof sheets will protect from the weather along the sides and I can see how vertically overlapping the gable at one end over the wall would protect that end when closed. But how does one weather proof the gable end that rolls back over the obs. I am talking about where the bottom of the gable meets the top of the end wall?

Brett