On Sunday, 30 June 2013 10:27:28 UTC+1, Tim Lamb wrote:
Could you *sound proof* the door. Obviously needs approaching carefully
but a strip of foam draught proofer might do the job. Stairwell doors
are notoriously noisy.

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Tim Lamb

Please note that there are no doors any near the stairwell. The room at the top of the stairwell where I was thinking of placing sound proofing material has no wall or door next to it. Immediately next to the stairwell is the "noisy neighbour wall". It all looks a bit like the following diagram below. I've squashed the words Room and Stairwell together, to show that there is no wall or door here, and I've used a | symbol to represent the "noisy wall". Thanks.

RoomStairwell|(noise occurs somewhere here, in the neighbour's house)