Efflorescence. The deposition of a white powder or crust on the surface of brickwork, due to soluble salts usually in the mortar but sometimes in the brick, and, drawn out with the moisture by the sun, left as a deposit on the surface. Brick clays containing these salts are now cured by using a carbonate of barium. Against mortar efflorescence care should be taken to protect all brickwork at eaves and sill courses from excessive moisture. Also Whitewash or Whitewashing.
Face Brick. A well-burned brick, especially prepared, selected, and handled to secure attractive appearance in the face of a wall, as distinguished from common brick as used for backing or other structural work.
Face. The long, narrow side of a brick, specially treated in the manufacture of face brick to produce certain color tones and textures.
Fire Stop. A projection of brickwork on the walls between the joists to prevent the spread of fire or vermin.
Flat Stretcher Course. A course of stretchers set on edge and exposing their flat sides on the surface of the wall. Frequently done with brick finished for the purpose on the flat side, such as enameled or glazed brick.
Flue. A passage in a chimney especially for the exit of smoke and gases, one or more of which may be enclosed in the same chimney.
Flue Lining. A smooth one-celled hollow tile for protecting flues.
Footing. The broadened base of a foundation wall, or other super-structure.
Green Brickwork. Brickwork in which the mortar has not yet set.
Grout. Rich mortar made very thin so that it will readily run into the joints of brickwork and fill them.