On 16/05/2020 16:29, Jim GM4DHJ ... wrote:


plopping noises

ROTFPMSL!


hope nobody hears you ....

I can hear my neighbour on her mobile phone, if she is at the
top of the stairs on her side of the party wall, which is
a cavity wall, with two 4inch block leafs and a one inch air gap.

I think the (1976) builders used the wrong sort of blocks. Either
that or the whole batch was defective and very porous.