Labourers undertake a range of practical and manual tasks in the building and construction industry. They assist building and construction personnel by loading and unloading materials, tools and equipment, digging trenches and erecting scaffolding or barricades. They also mix, pour and mould building materials, sweep building foundations or paving bases, apply asphalt or other materials to paths and roads, and operate building and construction or paving machinery. They may also assemble and install piping, sanitary units such as showers and basins, and valves and fittings. Labourers work all over the state, assisting in the construction of homes, offices, schools, hospitals, roads and pathways.