On Nov 17, 6:00*pm, "EXT" wrote:
mm wrote:
Speaking of soundproofing, is there anything in the building code or
common practice that would indicate what separates my townhouse from
the next one?

My house was built in 1979, and I see one layer of cinder blocks in
the basement and the attic.

Is there likely to be a second layer of cinder blocks which is part of
the neighbor's house?

PS. The guy who first bought the house was cold all the time and
wanted quiet so he put another layer of sheet rock in the back of his
bedroom closets which cover whole wall that borders the neighborh,
and on the two outside walls, and a layer if cork somewhere else. * I
hear almost nothing from the other house, and I'm wondering if there
are two layers of cinder block or one.

That cinder block wall is not for soundproofing, it is for fire separation.