Figure 5-5.Single-layer application of drywall.

Builder 3&2 Volume 02 - Construction manual for building structures
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Figure 5-5.—Single-layer application of drywall. ceilings are 8 feet 1 inch high or less, run wall sheets horizontally. Where they are higher, run wall sheets vertically, as shown in figure 5-5. The sides of drywall taper, but the ends don’t, so there are some layout constraints. End joints must be staggered where they occur. Such joints are difficult to feather out correctly. Where drywall is hung vertically, avoid side joints within 6 inches of the outside edges of doors or windows. In the case of windows, the bevel on the side of the drywall interferes with the finish trim, and the bevel may be visible. To avoid this difficulty, lay out vertical joints so they meet over a cripple (shortened) stud toward the middle of a door or window opening. When installing drywall horizontally and an impact-resistant joint is required, you should use nailing blocks (fig. 5-5). Handling There are several things you can do to make working with drywall easier. First, don’t order drywall too far in advance. Drywall must be stored flat to prevent damage to the edges, and it takes up a lot of space. Second, to cut drywall (fig. 5-6), you only need to cut through the fine-paper surface (view A). Then, grasp the smaller section and snap it sharply (view B). The gypsum core breaks along the scored line. Cut through the paper on the back (view C). Third, when cutting a piece to length, never cut too closely. One-half-inch gaps are acceptable at the top and the bottom of a wall because molding covers these gaps. If you cut too closely, you may have difficulty getting the piece into place. Also, where walls aren’t square, you may have to trim anyway. Fourth, snap chalk lines on the drywall to indicate joists or stud centers underneath attachment is much quicker. Remember: Drywall edges must be aligned over stud, joist, or rafter centers. Fifth, when cutting out holes for outlet boxes, fixtures, and so on, measure from the nearest fixed point(s); for example, from the floor or edge of the next piece of drywall. Take two measurements from each 5-6

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