Loft conversion and soundproofing

[Mabelshouse]

We are currently getting a dorma in our roof to make an extra bedroom and bathroom. One of the reasons is due to neighbour noise. Our bedroom in next to our neighbours ( we live in a 60s semi). Through the party wall, their teenager stays up late on his x box, plays music and is generally really annoying, I am hoping our move into the loft will mean we can sleep at night, however, just wondering.,,,will the sound travel up? We will be one floor up and only adjoining their roof cavity. Worried sound will still travel up the wall.

Any ideas? What might help?

Following

We have a loft conversion and have never noticed the sound travelling up. Although our neighbours aren't especially noisy. The main noise is the rain at night or the birds tap dancing on the roof in the mornings!!!! 😂 I love it!

I'd expect the only way noise would travel from a room diagonal to you (so, no shared wall and no shared floor/ceiling) is through a chimney breast if there is one? That's the case with my "diagonal" neighbour. (Not a loft conversion, but I'm in an upstairs flat, and she's the floor below.) I never usually hear her unless she's having one of her mysterious screaming fits (mental health issues I think), in which case I'll catch it through chimney. Only faintly though.

Hmmm. The lad does have a tv on the chimney breast and sound does come through the party wall on there. I’ll speak with builders about it this week to see if there’s anything we can do,

Thanks.

Our house is much older that OP's but our second storey is higher than our attached neighbour's roof space. The noise that comes through is ridiculous.
Luckily it doesn't affect our current bedroom but our DD will soon be moving in there. The other rooms his house borders are practically unusable and it always sounds like we've got a tv on on the landing.

So it is still likely to be heard up the chimney breast then. I may have to look into soundproofing.