Every job you learn something. When you've done masse of roofs or staircases you've built up an approach knowledge base you don't even know you have and your routine is fine-tuned.Strokes for folks innit a roofing square on a roof is near identical to marking a stairs out but im fucking useless at roofs having done so few of them but I have made probably made 20k staircases in 30 years .. we make 1200 stairs a year from basic rubbish to get up to a mezzanine to 50k full curves and none of them faze me chiz ... show me a hipped roof and the fat kid starts to quiver and shake![]()