How to Anchor Screws in Drywall? | The Right Way

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Anchor screws in drywall by matching the anchor type to the item’s weight, installing it flush with the wall, and driving the screw snug without over-tightening.

For the full breakdown, see our best Anchors guide.

Hanging a shelf, curtain rod, or heavy mirror on drywall comes down to one thing: choosing the right anchor and installing it correctly. The wrong anchor or a hole drilled too wide ends with pulled-out fasteners and damaged walls. Whether you’re securing a light picture frame or a large cabinet, the steps are straightforward once you know which anchor fits the job and how to seat it flush.

Which Drywall Anchor Should You Use?

The anchor you pick depends on the weight of what you’re hanging. For light items like small frames or hooks, plastic expansion anchors or self-drilling threaded anchors work fine. For heavier loads such as large mirrors or shelving, molly bolts or toggle bolts are the stronger choice.

  • Plastic expansion anchors: need a drilled pilot hole; tapping the anchor in and driving the screw expands it behind the wall.
  • Self-drilling/threaded anchors: skip the pilot hole; drive them directly into drywall until flush.
  • Molly bolts (hollow-wall anchors): require a correctly sized hole; tightening the screw expands the anchor behind the drywall.
  • Toggle bolts: need a larger hole so the folded toggle passes through and opens behind the wall; best for the heaviest loads.

If you’re unsure how much weight your wall can take, check the package for load limits and hole sizes. Lowe’s and The Home Depot both stress following the manufacturer’s instructions for the exact drill-bit size and screw size.

Steps to Anchor Screws in Drywall

Installing any drywall anchor follows the same basic sequence: mark the spot, prep the hole if needed, seat the anchor flush, then drive the screw. Here’s how it works step by step.

  1. Mark the spot and check for studs. Run a stud finder over the area first. If you hit a stud, use a stud-based fastener instead of an anchor — it offers better support than drywall alone.
  2. Drill a pilot hole only if required. Use the drill-bit size specified on the package. For expansion anchors, the hole must be smaller than the anchor when instructed. Self-drilling/threaded anchors skip this step.
  3. Tap the anchor in until flush. Keep the collar level with the drywall surface; don’t bury it below the wall face. For threaded anchors, drive them in with a screwdriver or drill on low speed until flush, applying steady pressure.
  4. Insert the screw and tighten snug. Stop when the fastener feels secure and the anchor is engaged. Overtightening strips the anchor or damages the drywall.

When mounting an item with brackets, the screw may need to pass through the bracket before entering the anchor. Also, drill perpendicular to the wall, as Lowe’s advises, to keep the anchor straight.

Common Mistakes to Avoid

Most anchor failures trace back to a few avoidable errors. The Home Depot’s guidance highlights several worth remembering:

  • Using the wrong hole size: a hole too large reduces holding strength and can let the anchor or screw fall out.
  • Overdriving or over-tightening: strips the anchor, damages the drywall, or ruins threaded anchors.
  • Driving a hammer too hard: can punch through the wall or crack the drywall face.
  • Skipping the stud check: screws into studs almost always provide better support than anchors in drywall alone.
  • Reusing anchors after removal: replace the anchor if the screw is taken out after installation, since removal weakens it.

Also make sure the anchor type matches your wall. Self-drilling anchors are meant for drywall only, and toggle bolts need enough behind-the-wall clearance for the toggle to open fully. Your load limits and correct drill sizes are printed on the package — read them before drilling. If you need to compare anchor options for your next project, our tested roundup covers the best anchors on the market.

FAQs

Can I screw directly into drywall without an anchor?

Yes, for very light items like small picture frames, a screw driven directly into drywall can hold briefly. But drywall alone provides little holding power, and the screw will likely pull out under any real weight. Use an anchor for anything that needs to stay put.

How much weight can a drywall anchor hold?

Holding capacity varies by anchor type and brand. Check the package rating and match it to your item’s weight.

What if I drilled the hole too big for the anchor?

An oversized hole means the anchor won’t grip properly and may fall out. The fix is to remove the anchor and use the next size up, or patch the hole with spackle and reposition slightly. Never force a smaller anchor into a larger hole and expect it to hold.

References & Sources

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