The extruded/ wirecut method is the most popular method of brick production as a high volume of bricks can be manufactured quickly, around 20,000 bricks an hour. The clay is driven through an extrusion head to form a continuous column of material in the desired width and depth. The column is then cut into smaller, more manageable pieces approx 1.5m in length known as ‘slugs’. This is then cut into bricks of the desired length by row wires.
One distinctive characteristic of an extruded brick is that they tend to have perforations or core holes running through the bed of the bricks. Perforated bricks require less energy for drying and firing and are also lighter and easier to handle.
This manufacturing process produces hard, dense bricks with a more consistent size and shape, sharper arises and a more contemporary appearance. Extruded bricks are available in a wide range of styles including smooth, dragfaced, rolled texture, sandfaced or even glazed.