Outbuilding business...

Spent last weekend cutting back wildly overgrown trees and shrubs, and removing the plastic roof extension on the outbuilding. Got up onto the first level of the roof and cleared up the broken tiles and whatnot, but couldn't face getting up onto the top level. Was able to get a closer look at the extent of the damage though. I'm either going to have to rig up some kind of scaffolding and attempt the repairs myself, or call in the experts if the work is beyond me. Here's a couple of before and after pics. Does it look better?