In some ways this should have been the easiest roof to made. It is the smallest and each section is a simple rectangular shape, in contrast to the first building were each roof section was a different size and shape.
However, this roof wasn’t that straightforward. I glued one of the sections in the wrong place and it protruded about 3mm (0.1 inch) too far forward. It looked wrong and had to be removed. Although I noticed it quickly, I had used ‘hot glue’ to stick it in place and the glue had set solid. Prising off the cardboard roof damaged it, and I had to remake the right hand section !