if you think you need one to provide future evidence then were one, but think you you need to advise anyone's threshold you are stepping over that you have one and its recording
Woody of course it can be done, you take down wall put your foundations in then rebuild wall and then continue with your own extension wall. If the neighbour wants to be really difficult then there is little option other than to just build with what you have. Is the dividing wall yours, the...
Best idea would be to incorporate with necessary foundation to incorporate the wall into your new extension, if you or a building inspector explains to him / her what future implications might be.
well gap between your new extension will fill with all sorts of wind born detritus between the wall. will coarse you damp problem eventually so somehow you need to agree with your neighbour how to prevent this happening, because either you will have damp problem or wall will fall down.
Chris you are measuring and comparing two different things. On the left hand you are measuring thread diameter, on the right you are measuring the nut size, across flats to be precise. If you look under nut you will find same 15mm male thread.