How to Sand Textured Drywall to Reduce Lap Lines (Step-by-Step)

For textured drywall work focused on reduce lap lines, a consistent grit plan matters more than brute force. Use light, even pressure and keep the scratch pattern uniform. These silicon carbide sheets support wet or dry use, so you can choose dust control or faster dry sanding depending on the job.

Why Sanding Matters

Sanding removes high spots and creates a controlled scratch pattern that coatings and finishes can grip. The right sequence prevents deep scratches from showing through and helps you reach a smooth, even surface faster.

Tools

• Sanding block (recommended for flat areas)
• Flexible hand pad (helpful on curves)
• Vacuum or brush for dust removal
• Microfiber cloth or tack cloth
• Optional: spray bottle + clean water for wet sanding

Recommended Grit Sequence

• 150 grit
• 220 grit
• 320 grit
• 400 grit

Step-by-Step

1. Prep the area. Remove loose debris and wipe the surface clean so you don’t grind contaminants into the finish.
2. Start with the first grit. Use 150 Grit (25) to level imperfections and blend transitions.
3. Move up and refine. Switch to 220 Grit (25) and sand until the previous scratches are consistently replaced.
4. Finish the surface. Use 320 Grit (25) for a uniform scratch pattern suitable for the next finish step.
5. Check your work. Use angled light to spot remaining scratches or ridges before you proceed.
6. Clean before coating. Vacuum and wipe down thoroughly (and let it dry if you wet sanded).

Special Cases

Edges: Reduce pressure—edges cut faster and can round over.
Soft finishes: Use the finest grit in your plan and avoid over-sanding.
Wet sanding: Keep the surface lubricated and wipe slurry often to inspect progress.

Pro Tips

• Don’t skip grits—each step removes the scratch pattern from the previous step.
• Change direction slightly with each grit to make leftover scratches easier to spot.
• Replace sheets when cutting slows; worn abrasive can burnish instead of smooth.
• If the paper loads up, switch to wet sanding or clean the surface more often.

Aftercare

• Remove all dust before priming/painting or applying finish.
• Store sheets flat in a dry place to prevent curling.
• Dispose of sanding dust safely—especially if you sanded old coatings.

FAQs

• When should I wet sand? When you want better dust control or a cleaner cut on finishes that clog the paper.
• How long should I sand with each grit? Until the scratch pattern is uniform and the previous grit marks are gone.
• Do I need a sanding block? For flat areas, yes—blocks help keep the surface level and avoid finger grooves.

Watch & Learn

Watch how the sanding strokes overlap and how the surface is checked under angled light—those two habits prevent rework.

Want to follow this exact approach? Start with 150 Grit (25), then step up through the sequence for a cleaner, more consistent result.