Drywall Diagrams
6 diagrams · 2 calculators
Sheet stagger, thickness by location, joint-finishing levels, and screw length, thread and spacing schedules — how board actually goes up and gets fastened to code.
Calculators in this category
Drywall · 6 diagrams
- Drywall
Drywall thickness by location — ½″ on walls, ⅝″ on ceilings
Hang ½″ board on the walls and ⅝″ on the ceiling — the thicker ceiling board resists sagging between 24″ o.c. joists and adds fire rating (IRC R702). Thickness also sets weight: ¼″≈38, ⅜″≈44, ½″≈54, ⅝″≈70 lb per 4×8 sheet.
- Drywall
How to hang drywall — run sheets horizontal and stagger the butt joints
Hang sheets horizontally so the tapered factory edges meet at the long seam (an easy-to-fill recess), and stagger the butt joints — the untapered cut ends — brick-fashion instead of stacking them. Longer sheets mean fewer butt seams to finish.
- Drywall
Finishing a drywall seam — tape plus three coats feathered wider
Finish a tapered seam by bedding paper tape in a first compound coat, then a fill coat and a finish coat each feathered wider and sanded flush — a 3-coat Level 4 finish (GA-216). Plan ~280 sq ft of compound per gallon per coat (USG); tape ≈ each sheet’s perimeter.
- Drywall
Drywall screw spacing — edge vs. field fasteners, and why ceilings need more than walls
Screws go in denser around the perimeter (edge, ~8″ walls / 7″ ceilings) than in the field (~12″), and a ceiling is fastened tighter than a wall — closer framing (12″ vs 16″ o.c.) and more screws (40 vs 32 per 4×8) — because gravity works to make a ceiling sag. Keep every screw ≥⅜″ from a cut edge.
- Drywall
How deep to drive a drywall screw — dimple the paper without breaking it
Drive the head to a slight dimple just below the surface with the face paper intact. Leave it proud and compound can’t hide it; break the paper and the screw holds only in the crumbly core. The head must still bite ≥⅝″ into wood (¼″ into steel).
- Drywall
Which drywall screw — length by board thickness, thread by framing material
Two separate choices. Length = board thickness + ≥⅝″ of bite into the framing (1¼″ for ½″ board, 1⅝″ for ⅝″). Thread = the framing material: coarse #6 for wood, fine for steel. The wrong thread strips out.