You were a bit vague about what your neighbours did that caused the ceiling to fail.
Did they reinstate the same flooring after the incident?
What was/is their floor covering?
We had a soil pipe leak into our Edwardian school conversion ruining the walls and the laminate on rag underlay over original concrete in our bathroom. When the managing agents finally sorted out the claims we paid for a tiled floor in the bathroom as an absorbant underlay under a permiable flooring was ... not good. The floor was tiled and we were very happy until we bumped into our downstairs neighbours. They wanted to know what we'd done in our bathroom as they could now hear "everything" when before they heard "nothing". Tiling the floor and fixing the toilet to the concrete meant they there was only a single skin of plasterboard between the loo and their bedroom. The irony being that they were the inspiration for tiling the floor and they also had neighbours below them.
Did they reinstate the same flooring after the incident?
What was/is their floor covering?
We had a soil pipe leak into our Edwardian school conversion ruining the walls and the laminate on rag underlay over original concrete in our bathroom. When the managing agents finally sorted out the claims we paid for a tiled floor in the bathroom as an absorbant underlay under a permiable flooring was ... not good. The floor was tiled and we were very happy until we bumped into our downstairs neighbours. They wanted to know what we'd done in our bathroom as they could now hear "everything" when before they heard "nothing". Tiling the floor and fixing the toilet to the concrete meant they there was only a single skin of plasterboard between the loo and their bedroom. The irony being that they were the inspiration for tiling the floor and they also had neighbours below them.