The broad purpose of the occupation is to lay bricks and blocks, sometimes utilising modern methods of construction and premanufactured elements to construct walls. Bricklayers carry out simple setting out, prepare mortar and use a trowel to lay bricks, mortar and apply damp-proof materials to complete the project to specification and required design. Bricklayers use spirit levels and plumb lines to check building alignment and use hammers and chisels to shape and trim bricks and blocks. Bricklayers typically work outdoors on construction sites, in most weathers and at height.