That's why i said itI used to do roofing I was a apprentice for 3 years roof tiles are very very hard to break they take men of 80+ kgs stomping over them all day with no prob sat all. I allso use a gutter vac with a steal crevice tool on it and when it gets blocked i tap it on the tiles and I've never had any probs what so ever. And for future reference roof tiles range between £0.80 up to about £2.50 for the most expensive ones so never go through insurance for this. Hope this helps
Was roofing for a long time and i was ok and I'm not small