They are often sideways attached to dividing walls or use a common wall.
The dwelling units must share a common wall or common floor/ceiling.
Some houses share a common wall as a duplex unit.
A common wall forms around the juxtaposed gamonts to form a gametocyst.
The two theatres were known as' the rickety twins': both were of such flimsy construction that performers could hear each other through the common wall.
If the bubbles are of equal size, their common wall is flat.
For example, two pendulum clocks (of identical frequency) mounted on a common wall will tend to synchronise.
There is a rift between both the families because of a building construction (common wall) problem, while building their houses.
