HOW TO BUILD THE WALL 5

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 The various types of gypsum wallboard are;
1. Regular or standard gypsum wallboard, available in 3/8" and 1/2" thicknesses. The 1/2" board is preferred in new construction . Generally, these boards are made with square, beveled and tapered edges. The square-edges board is used, as a rule, where no decorative treatment is required . The beveled edge is used where an accented joint is desired for architectural reason, The tapered-edge board is to be used with the tape-and-cement joint concealment system.
2. Type X gypsum board, made in 1/2" and 5/8" thicknesses and with both square and tapered edges, has a specially formulated core designed to increase resistance to fire and sound transmission.
 wallboards are easy to cut; just score with a knife and break. Nailing is easy, but the paper face must not be broken. The big panels cover up to 48 square feet of ceiling or wall surface and go up quickly.However, it takes some patience in plastering and sanding to insure that the joints between the panels will be invisible under a finish coat of paint. Hammer dents or nail heads must be spotted with joint cement and perforated tape used at all joints plus inside and outside corners.All surface must be primed before painting unless  you purchase wallboard with such faces as knotty pine, bleached and dark walnut. The following are some tips to mark your wallboard installation easier;
    1.Mark sure that the framing members(the studs and joists) are straight and in alignment.
    2. Start with the ceiling. If possible, span the entire width or length of the ceiling with one piece of gypsum board. This will reduce the footage of the joints that will require concealment later.
   3. Nail the board properly, using the annular ringed, bright-finish nails specially recommended for the application of gypsum wallboard. Start nailing at the center of the board and work outward. Nails should be spaced up to 6" apart on the ceiling, up to 7" apart on the sidewalls, and never less than 3/8" from edges or ends of the board. The area of the board immediately surrounding each nail should be  held tightly against the farming while the nail is being driven.
   4. If is generally advisable to apply the long dimension of the wallboard at right angles to the studs or joint because it usually reduces the amount of joints to be concealed. In such horizontal application, start sidewalls at the ceiling. Fit lower board snugly with out wedging.