Hi all. I’ve recently had a wall rendered and it looks odd (spider web pattern) and some of it has blown. The renderer is a lovely guy and has already taken away the blown render but thinks the problem with the blown part is rain water getting in behind it! My builders are saying that that’s not the case and querying the dodgy pattern too. My builders are also saying that silicone shouldn’t crack. Any ideas? Any help/advice would be greatly appreciated. Thanks. Sue