We spend a lot of time with the issue of masonry veneer separation. During investigation, we look for signs that veneer has separated from the back-up masonry. In reports, we warn of the potential for veneer failure. In discussion with clients, we recommend pinning or otherwise stabilizing veneer.
Sometimes we actually see the failure that results when the veneer pulls away, and it’s not pretty. In this case, the thick ashlar unbonded from the brick and rubble back-up.