After much research we now know our flat roof can only be built using shaped insulation. And elbow grease.   '... Much research.... ' disguises a long , nitty gritty detail process, much head and withers scratching. However, good progress towards conscious incompetence has been made. Not bad when you consider I started out unconsciously incompetent. Help me on my journey please....   One quote shows that, to create the fall, some of the PIR panels will be cut to shape by the