I bought a brand new unit a year ago, and the only problem I've had with it is waste water noise from the pipes from the upstairs unit. In fact the noise is so bad that i get woken up whenever they flush the toilet or 'use the toilet' upstairs.
the builders ([edited] constructions) have come in to try and rectified it by stuffing pink batts (poor second rated attempt to fix it) which had no effect at all in reducing the noise. in trying to get them to fix it properly they've turned around and now say it's not their problem.....
my most hated list of people are:
all three are ******* money sucking leeches. After waiting almost a year to get it fixed by the builders, and who are now denying that its their problem at all, I decided to get it done myself.
I organised a tradesmen ([edited] tilers) turn up to do some work (remove the pipe stack so I could get the pipes lagged with insulation) - he rings me up early that morning to say he's coming in an hour, and knowing how difficult it can be to get someone i decided to take the morning off work for him to do it. He turns up, looks at the work - he says he's going to his car to get the tools, and the idiot buggered off without telling me. refused to take my phone call when i tried to find out what happened to him. absolutely rude, no courtesey at all. what is wrong with these people? if he couldn't do it, or simply didn't wnat to do it why not just tell me? instead of ******* off like that? and I'd taken that morning off work for him too. just bloody rude.
luckily I found someone else to to do who did a fantastic job (Hire [edited] Merrylands).
the insulation guys then came in to lag the pipes, and we found the next day that we still had no reduction in noise. went to check it out and it wasn't even sealed properly. we then spent 7 hours on our saturday re-doing all their work.
the moral of the story is...don't trust any builders or tradesmens - they're all ******* - espeically those mentioned above. they waste your time, put you through the loops and leave you with nothing.
and above all, if you want anything done properly, do it yourself.