What Size Drywall Screws for 5/8 Drywall (and 1/2 Inch)

Quick answer: What size drywall screws for 5/8 drywall? On wood studs, the minimum is a 1-1/4 inch coarse-thread Type W screw. The rule behind it is simple: the screw must bite at least 5/8 inch into the wood, and 5/8 inch of board plus 5/8 inch of bite is 1-1/4 inches. For 1/2 inch drywall the code minimum is 1-1/8 inches, and USG recommends 1-1/4 inches for both.

That one rule, 5/8 inch into the framing, answers almost every fastener question you’ll hit on a hanging job, from basement walls to garage ceilings to a doubled-up sound wall between bedrooms. I’d memorize it. Then the math does the rest.

Drywall Screw Length by Board Thickness

These numbers assume single-layer drywall on wood studs or joists.

Board thickness	Code minimum length (wood framing)	USG recommended screw	Bite into stud with USG screw
3/8 inch	1 inch	1-1/4 inch Type W	7/8 inch
1/2 inch	1-1/8 inches	1-1/4 inch Type W	3/4 inch
5/8 inch	1-1/4 inches	1-1/4 inch Type W	5/8 inch
Two layers of 1/2 inch	1-5/8 inches	Check the system	5/8 inch minimum
Two layers of 5/8 inch	1-7/8 inches	Check the system	5/8 inch minimum

The minimums come from IRC Table R702.3.5, as summarized in a City of Grand Rapids building handout. The recommendation column is from USG’s Sheetrock installation guide. The two-layer rows are my own math using the same 5/8 inch rule.

Notice the last column. With 5/8 inch board, a 1-1/4 inch screw meets the rule with zero margin. None.

Should You Go Longer Than 1-1/4 Inches?

My take: for 5/8 inch board, a 1-5/8 inch screw is worth considering. It gives you a full inch of bite instead of exactly 5/8 inch, which helps when studs are slightly twisted or the board doesn’t sit perfectly tight. When I look at that table, the zero-margin row is the one I’d never bet a ceiling on.

Longer isn’t always better, though. Something far past what’s needed just costs time and torque. Aim for the minimum plus a little cushion.

For 1/2 inch drywall, 1-1/4 inches is the sweet spot. Easy.

Type W vs Type S: Match the Thread to the Framing

Thread pitch matters as much as length. People mix these up constantly.

• Type W (coarse thread) is for wood studs and joists. USG’s guide calls for Type W bugle head screws on wood framing.
• Type S (fine thread) is for light-gauge steel studs. Grabber’s spec sheet for its fine-thread drywall screw says it also attaches board to wood.
• On steel, Grabber says the screw must go past the steel by three full thread pitches.

Keep coarse-thread Type W screws out of steel studs. Fine thread is what’s built for light-gauge steel, and Grabber’s sheet says its 15 threads per inch suit exactly that job.

How Far Apart Drywall Screws Go

Length is only half the job. Spacing finishes it.

1. Ceilings: screws no more than 12 inches apart along each joist.
2. Walls on 16 inch framing: screws no more than 16 inches apart.
3. Walls on 24 inch framing: the IRC table drops wall spacing to 12 inches.
4. Edges: keep screws at least 3/8 inch from the ends and edges of the panel, per USG.
5. Depth: sink each screw just below the surface without breaking the face paper.

The trick is a screw gun with a depth-control nose. USG recommends one, and it’s the easiest way to set every head in a shallow dimple.

If you use a regular drill, go slow. Grabber warns that overdriving can make the fastener or the gypsum board fail, and USG says to leave the paper intact.

What Size Drywall Screws for 5/8 Drywall on Ceilings?

Same length, tighter spacing. Use at least 1-1/4 inch Type W screws on wood joists, spaced no more than 12 inches apart. Gravity is working against every fastener overhead, so don’t stretch that spacing to save time.

There’s one ceiling rule many people miss. The Grand Rapids handout notes that for a water-based sprayed or hand-applied texture, ceiling board must run perpendicular to the framing, with 1/2 inch board on 16 inch spacing and 5/8 inch board on 24 inch spacing.

Wet texture adds weight and water, and thinner board can sag. The same handout allows 1/2 inch sag-resistant ceiling board as an alternative to 5/8 inch.

When the Answer Changes

• Fire-rated walls and ceilings: Type X assemblies are tested as a system. Follow the screw type, length and spacing in the listed assembly, not a general chart.
• Two layers: add the thickness of both layers, then add 5/8 inch. Check the assembly or the board maker’s instructions for the second layer’s spacing.
• Hanging cabinets or a TV: the drywall screw doesn’t carry that load. Fasten into studs or use rated anchors. If you’re patching holes from an old mount, see how to fix drywall anchor holes.
• Tile backer board in a shower: that’s a different product with its own screws. Our tile and grout guides cover wet areas.

For more wall and ceiling guides, browse drywall and paint.

Frequently Asked Questions

What size drywall screws for 1/2 drywall?

Code sets 1-1/8 inches as the floor on wood framing. USG’s pick is 1-1/4 inch Type W, which leaves a comfortable 3/4 inch buried in lumber.

Are 1-1/4 inch screws long enough for 5/8 drywall?

Yes, on wood, but only just. They meet the requirement exactly, so crooked lumber or a gap behind the panel eats your margin fast.

Can I use 1-5/8 inch screws for 1/2 inch drywall?

You can. Honestly, though, it buys little on a single layer except slower driving and a heavier box to carry up the ladder.

How many screws per sheet of drywall?

It depends on spacing and framing. By my count, a 4 by 8 foot wall sheet on 16 inch studs takes about 28 screws at 16 inch spacing, whether you hang it vertically (4 studs, about 7 screws each) or horizontally (7 studs, about 4 each).

Do drywall screws need to go into studs?

Yes. Gypsum alone can’t grip threads. Any fastener that misses lumber or steel holds nothing, so back it out, fill that little hole, and try again an inch over.

Last updated: November 10, 2026. Sources: USG Sheetrock installation and finishing guide (PDF), City of Grand Rapids gypsum wallboard handout, IRC Table R702.3.5 (PDF) and Grabber fine-thread drywall screw submittal (PDF).