Toothing. The method of building the end of a wall so that the end stretcher of every alternate course projects one-half its length, against which another wall may be built.
Toothing-in. Joining a new wall to an old toothed wall.
Trimmer Arch. A brick arch built in front of and below a fireplace opening to support the hearth, abutting on the fireplace foundation and thrusting against the header joist.
Tuck-pointing. The filling in of joints in old brickwork with fresh mortar, usually cement.
Vertical Joint. Same as Head Joint.
Washing Down. Cleaning the surface of the brick wall, after it is completed and pointed, with a mild solution of muriatic acid.
Water Table. A slight projection of the lower courses of brickwork at the base of a building.
Webb. The thin wall bounding and separating the cells in hollow tile.
Whitewashing, Whitewash. See Efflorescence.
Wind Shelf. The ledge back of the damper at the bottom of the smoke cavern.