the screw heads are concealed with the drywall compound to make the wall seem as one uniform piece. The drywall plaster is a thick paste. Later this is painted or wallpapered over to hide the work. This process is typically called "taping" and those who use drywall are known as "tapers". Veneer plastering covers the entire wall with thin liquid plaster, uses a great deal of water and is applied very wet. The walls intended to be plastered are hanged with "Blueboard" (named as such for the industry standard of the outer paper being blue-grey in color). This type of sheet rock is designed to absorb some of the moisture of the plaster and thus allow it to cling the plaster better before it sets. Veneer plastering is a one-shot one-coat application; taping usually requires sanding and then adding another coat, since the compound shrinks as it dries. Traditional plastering The plasterer usually shows up after the hangers have finished building all the internal walls, by attaching blueboard over the frames of the house with screws. The plasterer is usually a subcontractor working in crews that average about three veterans and one laborer. The job of the laborer is to set up ahead of and clean up behind the plasterers, so they can concentrate on spreading the "mud" on the walls. Laborer's tasks Debris left on the floors from the "hanging" crew must be removed before floor paper can be set down and to remove any tripping hazards. Cover the floors with tar or brown paper since plaster can stain or be hard to remove from subflooring plywood. Run hoses and extension cords and set up job lights. Cover all seams with meshtape as well as any large gaps around outlets caused by poor roto-zip work. Gouge out any bubble in the wallboard caused by broken sheetrock under the paper and cover the holes with meshtape. Remove any loose screws (flies) left from the hanger missing the underlying frame. Cover all windows and doors with plastic sheets and masking tape to protect the wood of their frames and save on cleaning. If any plumbing fixtures or wall plugs have been installed they are also covered, as well as the bathtubs and showers. Set up for the next mix. As soon as the table is cleared the laborer is given instructions of how many bags will be needed as well as