Until they can complete the first floor they can’t really start building the second floor so they needed a temporary protective roof to cover the stairwell. Somehow they managed it by using some spare bricks from and earlier project and topping it off with some newly purchased corrugated metal roof panels. Well done team, the internal stairwell and the new internal toilets are protected against the rain.
They also managed to put a temporary water tank up there to supply the new toilets.