Quite an impressive video but to be honest who is going to hire a crane. With health and safety the way it is I doubt your be able to stand on a roof unless you got a safety net. They were cleaning from the floor but it was a bungalow. So what there saying is to do a house you either need a crane (I liked that) or stand on a roof or get scaffolding up or use an enormous long pole. Doesn't look that easy to do. The bungalow they were cleaning you would need twice the length pole to do some of the houses I've seen.