What Grit Sandpaper for Cedar Wood? (Start with 80 Grit)

Cedar sanding starts at 80-grit for rough, weathered boards — never coarser, since cedar’s soft grain tears and fuzzes under aggressive grits. Skipping grits or sanding past 220 burnishes the surface, closing the pores so stain goes on blotchy or won’t absorb at all. This guide covers the right grit progression for decking, furniture, and siding, the technique that avoids swirl marks, and how grit choice changes before staining.

📊 An 80-grit sheet isn’t identical from brand to brand. U.S. sandpaper uses the CAMI grading scale while European sheets use the finer FEPA “P” scale — CAMI 80-grit averages about 201 microns per particle versus roughly 192 microns for FEPA P80, a small but real difference if you mix brands mid-project on cedar. — Source: 3M Abrasives

Cedar Grit Guide by Project

The right starting grit depends on the cedar’s condition and what it’s becoming, not a single universal number. For how grit selection changes across other wood species, see our full grit sandpaper guide by task. Use the table below as a starting point for cedar specifically, then adjust up if the wood still feels rough after the first pass.

Project	Starting Grit	Progression	Stop At
Weathered decking	60–80	80 → 100 → 120	120
New or smooth furniture	100–120	120 → 150	150–180
Rough-sawn siding	80	80 → 100	100–120
Before staining (any surface)	100–120	120 → 150	150, grain open
Before painting	100	100 → 150	150–180, light scuff only

How to Sand Cedar Wood, Step by Step

Follow these steps in order — skipping the cleaning or grit-progression steps is the most common reason cedar comes out blotchy after staining. See our full wood sanding grit-sequence guide for the same technique applied to other species.

1. Clean the surface: Vacuum or brush away dirt, pollen, and loose fibers — trapped debris clogs sandpaper and digs deeper scratches than the grit alone would.
2. Match starting grit to condition: weathered or rough boards start at 60–80 grit; smooth or previously finished cedar starts at 100–120.
3. Sand with the grain: use a random orbital sander for large flat areas, letting the tool’s own weight do the work instead of pressing down.
4. Step up through the grits in order: move from 80 to 120 to 150 or 220, never skipping more than one level, so each pass fully erases the previous grit’s scratch pattern.
5. Hand-finish the last pass: switch to a sanding block or folded sheet for the final grit and any edges the sander can’t reach.
6. Wipe down before finishing: a tack cloth or barely damp rag removes dust so stain or sealer goes on evenly.

Sanding Cedar Before Staining

Stop at 150-grit, not 220, for most cedar you plan to stain. Finer grits close the wood’s open pores, and a closed surface absorbs stain unevenly or repels it almost entirely — the opposite of the smooth result most people are sanding for. See our cedar staining guide for the full prep-to-finish process.

Does a Finer Grit Always Mean Better Stain Absorption?

No. Past roughly 220-grit, cedar’s surface burnishes — the fibers compress and polish instead of leaving an open, porous surface — and stain beads or sits on top instead of soaking in. One area where finer grit does help is end grain: because end grain absorbs stain faster than face grain, sanding it to 320–400 grit slows that absorption down enough to match the color of the surrounding face grain.

Common Cedar Sanding Mistakes

Most uneven cedar finishes trace back to one of these five mistakes, not a bad batch of sandpaper.

• Starting too fine: beginning at 120–150 grit on weathered, rough cedar wastes sheets and takes far longer than starting at 80.
• Skipping grit levels: jumping from 80 straight to 220 leaves the coarser scratches from 80-grit still visible underneath.
• Sanding across the grain: cross-grain scratches show clearly once stain is applied, even if they’re invisible on bare wood.
• Over-sanding one spot: lingering in one area with a random orbital sander creates a shallow dip that catches light and stain differently than the surrounding surface.
• Skipping the dust wipe-down: sanding dust left on the surface mixes into the first coat of stain or sealer, leaving a gritty texture.

Cedar dust is also a respiratory irritant for a meaningful share of people who work with it regularly, and wood dust in general is classified as a Group 1 carcinogen by the WHO’s International Agency for Research on Cancer — wear a dust mask and work in a ventilated area or outdoors, not just when the dust looks heavy.

Finishing Cedar After Sanding

What you sand cedar for determines the finish that follows. Protective coatings like polyurethane, varnish, or exterior sealer shield the wood from moisture and UV; natural finishes like tung oil or linseed oil penetrate the grain instead of sitting on top, keeping cedar’s natural color and scent more intact. If you’d rather cover the grain entirely, see whether painting over cedar is the better call for your project.

A pre-stain conditioner is worth the extra step if you’re staining cedar for the first time — it seals the wood fibers so the stain absorbs evenly instead of blotching in the softer, more porous parts of the grain. For an ultra-smooth final pass below 220-grit, a fine steel wool alternative can take the place of your last sandpaper grit — see what grit sandpaper equals 0000 steel wool to match it correctly.

Frequently Asked Questions About Grit Sandpaper for Cedar Wood

Should I sand cedar wood before staining?

Yes. Sanding removes weathering, mill glaze, and old finish so stain can absorb evenly. Stop at 120–150 grit for staining — sanding finer than that closes the wood’s pores and stain won’t soak in properly.

What grit sandpaper should I start with for rough cedar?

Start at 60–80 grit for weathered or rough-sawn cedar. Starting finer than 100 on rough wood wastes sandpaper and takes much longer to remove the damaged surface layer.

Should you sand cedar wood by hand or with a power sander?

Use a random orbital sander for large flat surfaces like decking or furniture panels, then finish by hand with a sanding block or folded sheet for edges, profiles, and the final grit pass. Hand sanding alone is fine for small projects but slow on anything larger than a single board.

What grit sandpaper is best for cedar decking?

Start weathered decking at 60–80 grit, then move to 100–120 for the finishing pass. Stop there — sanding decking finer than 120 removes the slight texture that helps keep the surface from getting slippery when wet.

Can you over-sand cedar wood?

Yes. Sanding past roughly 220 grit burnishes cedar’s soft surface, compressing the fibers until the wood repels stain instead of absorbing it. Lingering too long in one spot with a power sander can also dig a shallow dip in the surface.

How do you sand cedar wood siding?

Start rough-sawn siding at 80 grit and move up to 100–120 for the final pass, always sanding with the grain. Work in manageable sections and clean off dust between grits so debris doesn’t clog the sandpaper or scratch the next pass.

Conclusion

Cedar rewards a slower grit progression more than most woods — start at 60–80 for rough or weathered surfaces, work up in single steps, and stop at 150 if a stain is coming next. Skipping that order is the fastest way to end up re-sanding a blotchy finish instead of doing it once.