junior estimator, Terminology, foundations

The band is the face brickwork which would normally be on top of the blockwork starting below the ground up to the DPC, so that only face brickwork is seen.
It would be shown as a number such as 0.900 Th which would mean 0.9 0f a thousand, or 900 bricks.

Normally used as a backing wall where for example a stone face would be used, rather than a solid stone wall.