Drywall is more than counting sheets. A complete order also covers joint compound, tape and screws, and getting those right means you finish the job without a hardware run halfway through taping. This guide covers the sheets and the finishing materials together.
Sheets
Add up every wall and ceiling area you are covering, add 10 percent for cuts and offcuts, then divide by the sheet area. A standard 4 by 8 sheet is 32 square feet, and a 4 by 12 is 48. Larger sheets mean fewer seams to tape and finish, but they are heavier and harder to handle alone.
Worked example
A room with 800 square feet of wall and ceiling: with 10 percent waste that is 880 square feet. Using 4 by 8 sheets at 32 square feet, that is 880 divided by 32, about 28 sheets. With 4 by 12 sheets at 48 square feet, it is about 19 sheets, with fewer seams to finish but heavier boards to lift.
Finishing materials
| Material | Rough quantity |
|---|---|
| Drywall screws | about 1 lb per 300 sq ft |
| Joint compound | about 1 gallon per 100 to 200 sq ft |
| Joint tape | close to the total length of your seams |
| Corner bead | the length of your outside corners |
Compound use depends heavily on how many coats you apply and how smooth a finish you want, so treat the figure as a starting range and buy a little extra mud, since it is cheap and you do not want to stop mid coat.
4 by 8 or 4 by 12
4 by 12 sheets reduce the number of butt joints, which are the hardest seams to finish invisibly, so pros often prefer them on long walls and ceilings. For a solo DIY job in tight spaces, 4 by 8 sheets are far easier to carry and manoeuvre. Choose based on who is hanging them and the room layout.
Hanging tips
- Hang ceilings first, then walls, so the wall sheets help support the ceiling edges.
- Stagger the butt joints so they do not line up, which makes them easier to hide.
- Hang sheets horizontally on walls where you can, to put the long tapered edge at a convenient height.
Round up and keep an offcut
Round sheets up to whole boards, and keep a usable offcut or two for patches. Drywall damage happens, and a stored offcut saves buying a full sheet for a small repair.