If I glue cork to the wall will it improve insulation?
One of the steps people take to soundproof or insulate a room, as well as to create a unique look, is to glue cork panels to the wall. Cork can diffuse sound and reduce the amount of ambient sound that escapes a room. It also helps to deaden the sound in a room, thereby preventing echo and feedback caused by sound reflecting from concrete or plaster walls.
Cork also helps to reduce heat loss in a room, which means that it does offer a bit of insulation. If you install a cork floor, you can also decrease the amount of heat you are losing through a standard wood or concrete floor.