counterlath

(construction) A batten laid lengthwise between two rafters as a bearing for laths laid crosswise.
(construction) Any lath laid without actual measurement between two gauged laths.
(construction) Any of a series of laths nailed to the timbers to raise the sheet lathing above their surface to afford a key for plastering.
(construction) One of many laths used in preparing one side of a partition or framed wall, when the other side has been covered in and finished.