Hungry joints

"Hungry joints" is a term used to describe joints that require repointing.
Straight joints occur when one vertical joint is directly above the vertical joint in the course below.

HorsemillCircular or polygonal farm building with a central shaft turned by a horse to drive agricultural machinery.Hungry jointsBrick or stone joints without pointing (exposed mortar), or deeply recessed to show the outline of each stone.

See also: Pointing, Mortar, Brick