Brick Glossary

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Term Definition

A method of finishing the interior face of a masonry wall to provide space for insulation, prevent moisture transmittance, or to provide a level surface for finishing.


Nailing strips placed in masonry walls as a means of attaching trim or furring.


Mixture of cementitious material and aggregate to which sufficient water is added to produce pouring consistency without segregation of the constituents.

High-Lift Grouting: The technique of grouting masonry in lifts up to 12 ft., Low-Lift Grouting: The technique of grouting as the wall is constructed.


1. The procedure of stacking brick in a kiln or on a kiln car.

2. Laying brick with the bottom edge set in from the plane surface of the wall.


Nearly vitrified clay products which have been fired at high temperatures. They have relatively low absorptions and high compressive strengths.

Head Joint

The vertical mortar joint between ends of masonry units. Often called cross joint.


A masonry unit which overlaps two or more adjacent wythes of masonry to tie them together. Often called bonder.

Blind Header: A concealed brick header in the interior of a wall, not showing on the faces. Clipped Header: A bat placed to look like a header for purposes of establishing a pattern. Also called a false header. Flare Header: A header of darker color than the field of the wall.

Heading Course

A continuous bonding course of header brick. Also called header course.

Initial Rate Of Absorptlon

The weight of water absorbed expressed in grams per 30 sq. in. of contact surface when a brick is partially immersed for one minute. Also called suction. See ASTM Specification C 67.


See Initial Rate of Absorption.


A furnace oven or heated enclosure used for burning or firing brick or other clay material.

Kiln Run

Brick from one kiln which have not been sorted or graded for size or color variation.

King Closer

A brick cut diagonally to have one 2 in. end and one full width end.

Lateral Support

Means whereby walls are braced either vertically or horizontally by columns, pilasters, cross walls, beams, floors, roofs, etc.


The section of a wall built up and racked back on successive courses. A line is attached to leads as a guide for constructing a wall between them.

Lime Putty

Hydrated lime in plastic form ready for addition to mortar.

Lime, Hydrated

Quicklime to which sufficient water has been added to convert the oxides to hydroxides.


A beam placed over an opening in a wall.


Brick, stone, concrete, etc., or masonry combinations thereof, bonded with mortar.

Masonry Cement

A mill-mixed cementitious material to which sand and water must be added. See ASTM C 91.

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