Use Drywall Screws when fixing plasterboard to stud partitioning. Make sure that you know what is behind the plasterboard and avoid pipes, electric cables etc before fixing the plasterboard. Plasterboard screws are black with pozidrive, countersunk heads. The screw length should be such that the screw penetrates the timber by about 25mm (1 inch) i.e. for 9.5mm thick plasterboard use 32mm long screws, or for 12.5mm plasterboard use 38mm long screws.