| Comment | When the tenements were built, it was normal to fill the void between joists with a material that was a mixture of something like ash and shells, which was extremely effective as a sound and heat insulator
https://www.designingbuildings.co.uk/wiki/Ash_deafening
In many tenements this was removed during renovations; this is something worth checking and, if so, you can refill the void with a similar modern material
But as others have pointed out, don't underestimate how much noise is actually coming through the walls and voids |
|---|