Drywall is typically finished, or “taped,” with three coats of joint compound, and then lightly sanded to produce a smooth surface suitable for decorating with most types of paints, textures, and wall coverings.

Three coats of joint compound are necessary to conceal the joints, corners, and fasteners. In some cases (when applying a setting-type compound and some lightweight compounds, for example), you can get acceptable results with just two coats, but three coats helps ensure a more professional-looking job. There is 5 different levels of finishing depending what the request for texture is going to be.