Surely scaffolding planks should be secured? My neighbour is having Solar panels fitted and one of the scaffolding planks at 1st floor level has just slide off and smashed into my bay window tiles! Two tiles on the end of the ridge smashed and of course it started to rain straight away! made a temporary fix to stop the influx of rain! My neighbour got onto the company straight away and the guy has come out and will get his roofer to come out tomorrow and either fix it or on Monday if no tiles in stock. But surely this should not happen, it could have been much worse? How should planks be secured?