We live in a semi with non-existent appalling soundproofing. We'd like to get soundproofing, but it's quite expensive. Next door (the other way, not the ones we're attached to) have had theirs done, and it's made a huge difference to them. However, it's also made a huge difference to the people they are attached to. So, it would seem that if you're the house to have soundproofing put in, not only does it benefit you, it also benefits your neighbours without them having soundproofed their walls. My question is, would IBU to ask our neighbours to contribute half the cost, which I think would be about £750? I suppose I feel like I don't want us to fork out for something that's going to make life quieter for our neighbours when they're the problem in the first place. Or is that just petty?? Exciting question for a Friday night, I know ;)