Just had scaffolding put up to give access to roof as we had some water ingress in the loft space. Have located a tear in the flashing, but also seen what looks like some questionable previous repairs to the chimney stack/firewall. The cracks in the render that have been "repaired" have a grey silicon I can pretty much peel away. Any idea what this would have been?
Also a rather large crack between the hip ridge and chimney stack.
What's my best option for repair? Re-render the whole thing? Someone also mentioned Acropol + as an option but I've seen varying opinions, although it seems to be on at least half the houses near me!
Thanks!