Taping and jointing involve covering and reinforcing the seams between sheets of plasterboard on a wall or ceiling. This method is used to prepare a wall for decoration and is an alternative to skim coating, where the entire surface of the plasterboard is covered with a thin layer of plaster. In the process of taping and jointing, joint tape is used to bridge the gaps between sheets of plasterboard. The tape is embedded in jointing compound, sometimes known as ‘mud’, to strengthen the plasterboard joints and prevent cracks appearing later. A couple of additional layers of jointing compound are then applied with a knife or trowel to create a seamless finish ready for painting or wallpapering. A final coat of plaster is not applied to plasterboard that has been taped and jointed. As a result, it is important that the jointing compound is blended into the surface of the wall to ensure that the joints are flush with the surface of the plasterboard. This is achieved through a process known as ‘feathering’.