When installing a lintel angle, should a mason place mortar beneath the ends of the lintel angle at jambs, or should the angle be laid dry on the units?
In many cases, masons lay the lintel angles dry on the masonry at the jambs. Placing a thin layer of mortar beneath the ends of the lintel at the jambs, however, can provide better bearing. This is especially true with closely spaced windows where the lintel is continuous over several piers. In these cases, by placing mortar beneath the lintel at each masonry pier, you ensure that the angle will be bearing on each pier. If you add a full mortar joint beneath the angle, the joint becomes too wide.