Cedar siding is wood cladding milled from one of a few naturally rot-resistant species, and it is still the reference standard for natural wood exteriors in the US. Nothing synthetic has fully copied how cedar takes a stain or how it looks after ten years of sun.
You pay for that. Expect $7–$22 per sq ft installed depending on grade and profile, with clear heart vertical grain at the top and knotty C grade at the bottom. Material alone runs $2–$13 per sq ft.
This guide covers profiles, grades, species and alternatives, costs, finishes, fastening, and maintenance. For shakes and shingles, see our cedar shake siding guide.
Cedar Siding Profiles: Bevel, Board and Batten, Channel, and Beyond
Bevel, also called clapboard, is the classic: horizontal boards 1/2 to 3/4 in. thick and 4 to 10 in. wide, thin edge up, thick edge down, lapping the course below. It sheds water well and repairs one board at a time. Grade shows most here — knotty bevel reads rustic, clear bevel reads formal.
Board and batten runs vertical boards with narrow battens over the joints. Strong vertical lines, popular on barn-style and modern farmhouse designs; we cover it in our board and batten siding guide.
Channel (rustic) cedar has a concave groove milled down the face. Deliberately rough — right for a lodge, wrong for a colonial.
Tongue and groove and shiplap use a machined joint instead of a lap. T&G shows a V-groove line and is common on gable ends and porch ceilings; shiplap has a rabbeted step that sits tight. Both need careful nailing so boards can still move.
Grades: Clear Heart, A/B/C, and Vertical Grain
Lap siding is graded on how much clear, defect-free heartwood a board contains.
- Clear Heart: all heartwood, no knots. The most decay-resistant part of the tree, takes stain most evenly, costs the most.
- A grade: clear or nearly clear, minor defects allowed.
- B grade: small, tight knots permitted.
- C grade (knotty): larger knots and more defects. What most budget cedar jobs use, and it looks right on a rustic house.
Vertical grain (VG) is a cut, not a grade — boards sawn so growth rings run perpendicular to the face. VG cedar cups less, holds finish longer, and shrinks predictably, which is why clear heart vertical grain is the most expensive cedar you can buy.
Knots deserve one warning. They shrink at a different rate than the wood around them, so they loosen and pop over time. Every popped knot is a hole for water.
Species and the Cheaper Alternatives
Western Red Cedar is the benchmark — light, stable, naturally decay-resistant, and available in every profile. Most cedar sold in the US is grown in the Pacific Northwest.
Eastern white cedar (sold as Northern white cedar) grows in the Northeast: lighter, softer, slightly less decay-resistant, usually cheaper locally. Incense cedar, sometimes sold as Spanish cedar, comes from California and Oregon — similar look, a bit more brittle. Cypress is the Southeast’s answer, harder and rot-resistant but prone to cupping. Redwood is beautiful and stable, but supply is limited and most of what sells now is reclaimed.
Thermally modified wood — pine or ash heated to roughly 400°F with steam — resists rot without chemicals. It is stable but more brittle, and it must be finished because it soaks up water fast. Usually cheaper than clear cedar.
If you want the look without the labor, fiber cement shake and polymer composite are the honest substitutes. Fiber cement delivers the profile and a 30–50 year life with little upkeep, but it is heavy, chips at the edges, and can crack under hail. Polymer panels look convincing from the curb and never need refinishing, but feel like plastic up close. Neither looks like wood at arm’s length.
What Cedar Siding Costs
| Grade | Look | Material, $/sq ft | Installed, $/sq ft | Best for |
|---|---|---|---|---|
| Clear Heart, vertical grain | Knot-free, formal | $7–$13 | $14–$22 | High-end builds |
| A grade | Nearly clear | $5–$9 | $11–$18 | Whole-house, stained |
| B grade | Small tight knots | $3.50–$6 | $9–$15 | Mid-range homes |
| C grade (knotty) | Large knots, rustic | $2–$4 | $7–$12 | Cabins, rustic designs |
| Shakes and shingles | Deep texture | $3–$8 | $8–$18 | See the shake guide |
On a 2,000 sq ft house with about 2,000 sq ft of wall, budget $15,000–$45,000 installed. Material is only 40 to 45% of that; the rest is labor, WRB, furring, flashing, trim, scaffolding, and disposal. Field-applied stain adds $2–$4 per sq ft; factory back-priming and pre-finishing costs less and performs better.
Field note: Spend the budget on grade before profile. A C-grade wall on a rain screen with back-priming outlasts a clear heart wall without either, at half the cost. Detailing beats lumber every time.
Finishes: Weather to Gray or Hold a Stain
Pick one of two honest paths before the first board goes up.
Path one: let it weather. Untreated cedar turns silver-gray — evenly in full sun over 2 to 3 years, blotchy in shade where mildew grows. It looks right on a coastal cottage or a barn. It is not maintenance-free: you still clean it annually and check for rot, and refinishing later is harder because the gray must come off with an oxalic-acid brightener first.
Path two: maintain a finish. Clear water-repellent adds no color and buys 2 to 3 years. Semi-transparent stain shows the grain and holds 3 to 5 years. Solid stain covers the grain and lasts 5 to 7 years.
Why stain and not paint: paint forms a film. Cedar moves with every humidity swing and pushes moisture out through the face, so the film cracks and peels in sheets. Penetrating oil and stain soak into the fibers and wear away gradually instead.
Fastening, Detailing, and Keeping Water Out
Nails: stainless or hot-dipped galvanized only, typically 6d to 8d. Aluminum and electro-galvanized nails corrode against cedar’s acids and ACQ-treated framing, and rust streaks run down the wall.
Blind nailing for bevel: drive the nail just above the lap line so the next course covers it. That hides the fastener and lets the board move. Never face-nail above the lap line.
Details that matter more than species: a WRB over the sheathing; vertical furring for a rain screen in wet climates; 6 to 8 in. of clearance above grade; kick-out flashing where a roof meets a wall; and back-priming every board, especially the ends.
Back-priming is the cheapest insurance on the job. End grain wicks water like a straw, and a board primed on all four sides outlasts one that was not. Leave 1/8 in. between boards so they can expand, and seal penetrations with urethane sealant.
Maintenance: What You Are Signing Up For
Wash the wall once a year with a soft brush and a mild cleaner. Keep a pressure washer under about 1,200 psi or you will raise the grain and open the surface to water. Touch up bare or checked spots as you find them.
Re-coat on the schedule the finish demands — 2 to 3 years for clear, 3 to 5 for semi-transparent, 5 to 7 for solid. South and west walls go first, and coastal salt air shortens every interval.
Inspect around year 10 to 15 for the failures that actually retire cedar walls: caulk joints at trim and corners, flashing details, the bottom course, and popped knots. Carpenter ants and termites work on damp wood, so fix the water source rather than treating the symptom.
Frequently Asked Questions
How long does cedar siding last?
Twenty to forty years depending on grade, species, and detailing. A clear heart wall on a rain screen with regular re-staining sits at the top of that range. A knotty wall butted against grade with face nails and no back-priming can fail in 15.
Is cedar siding worth the cost?
If you want real wood and will maintain it, yes — nothing else ages the same way. If you want the look without the labor, fiber cement or polymer panels get you most of the appearance for similar money and a fraction of the upkeep.
What is clear heart cedar?
All-heartwood, knot-free lumber cut from the center of the log. It resists rot best, absorbs stain most evenly, and carries the highest price — roughly double A grade and triple knotty C. Vertical grain clear heart is the most stable and most expensive cut of all.
How often does cedar siding need to be refinished?
Every 2 to 7 years depending on the product: clear water-repellents need recoating every 2 to 3 years, semi-transparent stain every 3 to 5, solid stain every 5 to 7. Sun exposure and coastal salt push you to the short end of each range.
Does cedar siding rot?
Yes, if water sits against it. Cedar resists decay far better than pine or fir, but end grain, joints, penetrations, and anything within 6 in. of grade will rot when they stay wet. A rain screen, back-priming, and clearance above grade prevent nearly all of it.
The Bottom Line
Cedar is the reference standard for natural wood cladding, and it earns that spot: it is stable, rot-resistant without treatment, and it looks better at year 15 than any imitation looks at year one. Buy it for the look and accept the upkeep — annual cleaning plus a re-coat every few years, forever. If that sounds like a burden, spend the money on fiber cement or polymer instead. Start with our home siding guide to see how cedar stacks up against the rest of the market.
About the author
Marcus Hale writes about exterior remodeling and building products for SidingHolic. He researches siding, trim, and gutter systems using manufacturer specifications, contractor pricing in US markets, and residential building-code requirements, then translates the trade-offs into plain language for homeowners. Read more about our editorial approach.