Ancient civilisations sun-dried clay mouldings for days and used the bricks in construction. While the use of the materials is not new, technology has influenced how they are formed. At present, bricks are used for their availability over concrete, and how easy they are to handle.
Compared with concrete, construction with bricks is also relatively cheaper. Most bricks used in NSW are burnt in a kiln. Burnt bricks have high strength and improved qualities. For example, first-class bricks can be used to make permanent structures.
They are robust enough to withstand the effects of time. That said, below are other categories of burnt bricks:
These bricks have regular but rough shapes. They are designed to have hair cracks. Their edges do not need to be uniform or sharp. Second-class bricks come handy when one is building structures that will be finished with plaster.
Unlike first-class and second-class bricks, third-class bricks are burnt in clamps. They have rough surfaces, but they are not hard. Their edges are blunt and irregular. When struck together, these bricks give a dull sound. They are instrumental in creating temporary structures.
These bricks are over burnt to produce a dark colour. They come in irregular shapes, making them useful as concrete aggregates in roads, brick floors, Surkhi, and foundations. Their over burnt nature gives them compactness that equals that of first-class bricks.
Typically, building bricks are rectangular and solid. However, depending on what the builder is going for, bricks can be made in other shapes and structures. For example, one can have first-class bricks custom-made in different forms to bring a different look to the final composition.
Be sure to check that the specialist working on your structures is skilled enough to handle the nuances that come with brick construction.