This method leaves alternating voids and projecting bricks at the vertical edge of a masonry wall. It allows masons to interlock a new section of wall into the existing one at a later time, creating a continuous structural bond. While common in older construction and additions, building codes often restrict its use in load-bearing walls due to the difficulty of fully packing the mortar joints during the tie-in.
Heard on the job
Leave some toothing on the east elevation so the next crew can tie in the extension on Monday.
Insider tip
Always check the structural drawings before leaving a toothed edge, as engineers often prefer stepped racking or mechanical wall ties for better lateral strength.