Light weight moulded cement bricks made to interlock and reinforced with PPE Fibres for extra strength Our light weight interlocking bricks are made with the needs of the modern builder in mind who wants a building brick that makes homes faster to construct and superior in all other ways to clay bricks. These moulded clay bricks are 40% lighter than a standard concrete alternative and they being made with an aircrete mix makes them a better insulator and more environmentally friendly than the clay brick alternatives. Interlocking moulded bricks are the construction product of the future with many builders switching to save money.