•	Using sheets of various materials – plastic, glass-reinforced plastic, fibre-cement, galvanised iron or aluminium – which might be corrugated, profiled or coated in coloured plastic

•	Measuring the area for new cladding and calculating the number of sheets needed

•	Laying out sheets, measuring and marking them, shaping them and cutting them to size

•	Together with other team members, hoisting sheets up by hand, or by using a crane, and positioning them on roof or wall

•	Drilling holes and using bolts to fix the sheets to the frame of the building

•	sealing the joints between the sheets, to make sure the building is watertight

•	Inserting insulating material and fitting roof lights.