underfelt

Together with thick carpet and underfelt, it should go a long way to pleasing the occupants of the flat below.

It is loose laid on underfelt like an enormous rug with a surround of polished wooden floors.

Gutters will overflow, often by no means gently and valley water can back up under tiles and underfelt, until it spills over into the room below.

Carter and Philip have written and performed together first with short lived Lupi and later (c. 2001) in Underfelt.

Because impact noise enters directly into the structure, there isn't a lot you can do to insulate floors: thick carpet and underfelt is the simplest treatment, and the most practical.