Thanks Blup. This was the approach I was hoping for until someone suggested structural issues with the section missing from load bearing wall, do you think that's an issue?
Phil
Hi
I removed an old electric fireplace from external load bearing brick cavity wall to find that part of the wall had been removed behind in order to install it.
I sealed it with some polystyrene blocks to reduce drafts and had a temporary log feature in its place for a while.
I now want to seal...