Figure 5-6.—Cutting gypsum drywallpoint, so you get the true height and width of the cutout.Locate the cutout on the finish side of the drywall. Tostart the cut, either drill holes at the corners or start cutsby stabbing the sharp point of the keyhole saw throughthe drywall and then finishing the cutting with a keyholeor compass saw. It is more difficult to cut a hole withjust a utility knife, but it can be done.InstallationWhen attaching drywall, hold it firmly against theframing to avoid nail-pops and other weak spots. NailsFigure 5-7.—Spacing for single and double nailing of gypsumdrywall.or screws must fasten securely in a framing member. Ifa nail misses the framing, pull it out, dimple the hole,and fill it in with compound; then try again. If you drivea nail in so deep that the drywall is crushed, drive inanother reinforcing nail within 2 inches of the first.When attaching drywall sheets, nail (or screw) fromthe center of the sheet outward. Where you double-nailsheets, single nail the entire sheet first and then add thesecond (double) nails, again beginning in the middle ofthe sheet and working outward.SINGLE AND DOUBLE NAILING.— Sheets aresingle- or double-nailed. Single nails are spaced amaximum of 8 inches apart on walls and 7 inches aparton ceilings. Where sheets are double-nailed, the centersof nail pairs should be approximately 12 inches apart.Space each pair of nails 2 to 2 1/2 inches apart. Do notdouble-nail around the perimeter of a sheet. Instead, nailas shown in figure 5-7. As you nail, it is important thatyou dimple each nail; that is, drive each nail in slightlybelow the surface of the drywall without breaking thesurface of the material. Dimpling creates a pocket thatcan be filled with joint compound. Although special5-7
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