Before you pick up a sheet, keep these fundamental principles in mind:
Hang Ceilings First: Always install the ceiling panels before the wall panels. The wall sheets will help support the edges of the ceiling sheets.
Horizontal vs. Vertical: In residential construction, wall sheets are typically hung horizontally. This reduces the total length of seams and places the "tapered" edges at a comfortable height for taping and mudding.
Stagger the Seams: Never align vertical seams between rows. Staggering joints (like bricks) prevents long continuous cracks and makes the wall structurally stronger.
Minimize Butt Joints: Drywall has "tapered edges" on the long sides and "butt ends" on the short sides. Tapered edges are easy to hide with mud; butt ends are not. Use the longest sheets possible to avoid butt joints.
Gap Management: Leave a 1/2-inch gap at the floor. This prevents moisture from wicking up from the subfloor and allows for settling without cracking the drywall.
Inspect Framing: Ensure all studs are crown-side out and aligned. Install "nailers" (extra wood blocks) in corners where there isn't enough surface area to screw into.
Mark Stud Locations: Mark the center of every stud on the floor and ceiling so you know where to drive screws once the sheet covers the wood.
The "Press and Fasten": Press the sheet tight against the framing. Start fastening from the center of the sheet and move toward the edges to prevent "bubbles" or bowing.
Screw Depth: This is the most critical skill. The screw head must be driven slightly below the paper surface to create a "dimple," but it must not break the paper. If the paper tears, the screw has no holding power; drive another one 2 inches away.
Fastener Spacing: Space screws every 12 inches on ceilings and every 16 inches on walls.
The Bedding Coat: Fill the tapered joints with joint compound (mud) and press the paper tape into it. Wipe away the excess mud with a 6-inch knife, ensuring there are no air bubbles.
The Fill Coat: After the first coat is dry, use a 10-inch or 12-inch knife to apply a wider layer of mud over the tape. The goal is to "feather" the edges so the hump becomes invisible to the eye.
The Finish Coat: Apply a very thin, watered-down layer of mud with a wide knife. This fills in any remaining pockmarks or minor imperfections.
Light Touch: Use a fine-grit sanding pole or sponge. You are only removing ridges and tool marks, not the mud itself. If you see the paper tape, you’ve sanded too far.
Dust Control: Use a shop vac with a HEPA filter or a damp sponge to manage the fine white dust.
Flashlight Test: Hold a bright light against the wall at a sharp angle (raking light). This will reveal every shadow and bump that needs more attention before you paint.