Chris, appreciate suggestion. Just a question, if it is thermal expansion, what could cause it to make a thud, I would have thought slab thermo expansion/contraction would run along…

Thank you, I do agree, will try and access plans and share. A while back I did look at them, but there was nothing unique about the build.

Thank you for reply. That would be the most logical and I have considered it, however, the water pipes are located 2 rooms (approximately 10 m away) over from…

Good day. I would appreciate help to try identify source of noise. I am in the top floor of an apartment block, and have a thud (knock) noise, a very…