I think sometimes they forget, or chose to ignore, that these are people’s homes. To them it’s a building and a job… but it’s pretty soul destroying seeing multiple holes drilled in your walls.

Our boy was welling up with tears just now (he’s only just got home) when I forewarned him about the holes in his bedroom walls.

But apart from pulling your house down an re-building it, the silicone sealant as an ugly and last resort idea just might work, but by the sounds of your problems it would also have to go between the gap between trespass panels so the whole out side of your building was either silicone sealant or traspass, and if it was done properly shouldn’t be that ugly (but that could be the hard part, getting it done properly…) Also if Wimpy/ Wood Newton are reading this, I don’t want to be a guinea pig for the sealant filler on the small water leak I have.

Good luck, hope they come up with a solution soon.