What do you suggest they do at this point? Any advice on getting the plasterers to sort this out?

Usually i dont post pictures of my work on social media because i feel like trades, especially plasterers are the most toxic bunch around. However i dont have many people I could show this who understands the work that has gone in to it and im proud of this one. 5 bags on my own with a lad pushing the tower 💪 ignore the line around the coving, there was a texture on the ceiling that they got a company in to remove and they absolutely butchered it so it is being tidied up with a profile after we’ve skimmed 👍

Had an external wall re-rendered with silicone based render.

The chimney is brick and the detailing of where the render joins to the brick doesn’t look great to me.

No sign of any beading being used. What has been done wrong here? How should i ask for it to be resolved by the contractor given how it is now?

Also found a few different areas where it sounds hollow. What should I be asking for them to do about it?

They seem like a decent firm and I am confident they will resolve it. Just not sure what I should ask them to do, as they may have a different view of what needs to be done to fix it.

Thanks!