How to Sand a Deck Before Staining: Even Color and Longer-Lasting Finish (60–220 Grit Guide)

Proper sanding before staining a deck is critical for even color penetration and long-term protection. Whether you’re restoring weathered boards or preparing new lumber, the right grit progression will help you achieve professional-grade results.

Why Sand a Deck Before Staining?

Deck boards exposed to sun, rain, and foot traffic can become rough and splintered. Sanding smooths the surface, removes old finishes, and opens the grain so stain penetrates deeply and evenly.

Tools & Materials

• Floor sander or orbital sander
• Edging sander for corners
• Vacuum and outdoor broom
• Wet/dry sandpaper sheets in multiple grits
• Protective gear: dust mask, safety glasses, hearing protection

Recommended Grit Sequence

• 60 grit: Removing old stain, paint, and weathered wood fibers.
• 120 grit: Smoothing boards after coarse sanding.
• 220 grit: Final prep for a silky, splinter-free finish before staining.

Step-by-Step: Sanding a Deck

1. Clear and clean the deck. Remove furniture, sweep thoroughly, and wash away dirt and mildew.
2. Coarse sanding. Use 60 grit (50-pack) to strip away old finishes and level uneven boards.
3. Smooth the surface. Switch to 120 grit (100-pack) to remove deep scratches and refine the texture.
4. Final finish sanding. Lightly sand with 220 grit (25-pack) for a splinter-free, stain-ready surface.
5. Clean up. Vacuum dust from boards and wipe down with a damp cloth.
6. Apply stain. Follow the manufacturer’s instructions for the best penetration and durability.

Special Cases

For new pressure-treated lumber, let the deck weather for a few months before sanding and staining to allow proper moisture release.

Pro Tips

• Always sand with the wood grain to avoid cross-scratches.
• Work in sections to maintain an even finish across the deck.
• Use a bright light or sunlight to inspect for missed spots before staining.

Aftercare

• Reapply stain every 2–3 years for maximum protection.
• Keep the deck clean to prolong finish life.

FAQs

• Can I use a belt sander? Yes, but be careful—it can remove too much material quickly.
• Do I need to sand between stain coats? Not for most penetrating stains; for film-forming finishes, a light 220 grit sanding can help adhesion.

Watch & Learn

Get your deck stain-ready with the perfect grit sequence. Shop all wet/dry sandpaper sheets now.