Cedar Shake Roof Cost: Grades, Fire Rating & Prices

By HomeCost Guide · Updated October 2026 · Professional cedar shake installation on a standard-size home (HomeAdvisor 2025 data)

A cedar shake roof costs $15,800 to $30,000 for most homes, with HomeAdvisor putting the national average at $21,000. What moves you within that range isn't just square footage — it's the grade of the wood. Cedar shakes are sold in grades from knotty Common to clear 100% straight grain, and the grade you choose changes both the price per square foot and how long the roof lasts. Then there's the maintenance reality buyers often miss: a cedar roof is a living material that needs cleaning, moss treatment, and periodic re-oiling, running $300 to $800 a year. And in wildfire-prone states, untreated cedar may not be legal at all — you need factory fire-retardant treatment for a Class A rating. This guide covers grade pricing, fire treatment costs, the maintenance budget nobody quotes you upfront, and how cedar compares to the synthetic lookalikes. All prices below are installed costs from published contractor data.

1. Cedar Shake Roof Cost: Grades, Fire Rating & Prices cost breakdown

Where the money goes: labor vs materials vs fees

• Labor$8,000–$18,000Labor is 40–60% of a cedar job (HomeAdvisor says 50–60%). Each shake is individually placed over an interlayment felt, which is far slower than laying shingle courses. Cedar specialists charge a premium over general roofers — and are worth it.
• Cedar shakes$5,000–$12,000Material cost hinges on grade: Common is cheapest, 100% straight grain the dearest. Straight grain also lasts longer, so the upgrade pays back in lifespan, not just looks.
• Underlayment and interlayment$1,500–$8,000Cedar needs a breathable system — typically 30-lb felt interlayment between every shake course plus a base underlayment at $0.75–$4 per sq ft (HomeGuide). This felt is what sheds the water that gets past the wood.
• Tear-off and disposal$2,000–$10,000Old roof removal adds $1–$5 per sq ft (HomeGuide). Cedar tear-off is laborious — shakes come off piece by piece — and the debris is bulky.
• Flashing, ridge, and extras$1,500–$5,000Metal flashing at $10–$30 per linear foot, ridge caps and hip treatments $500–$2,500, decking replacement $2–$5 per sq ft where rot is found, plus permits at $150–$500 (all HomeGuide figures).

Sources: HomeAdvisor, HomeGuide, This Old House. Figures are national averages compiled from published industry data; your price will vary by home and location.

2. Signs your cedar shake roof is failing

Signs your cedar shake roof is failing

• Curling, cupping, or splitting shakes — wood moves with moisture cycles, and distortion means the fibers are breaking down
• Soft spots or visible rot when you press a shake — cedar resists decay but eventually loses, especially in shade
• Persistent moss, lichen, or algae growth that keeps coming back after cleaning, signaling the wood stays damp
• Missing or slipped shakes after wind — individual fastening means failures are localized but multiply with age
• Interior leaks or daylight visible from the attic, particularly around valleys and penetrations
• Excessive granule-like wood debris in gutters — actually deteriorating shake fibers washing off the roof

3. How cedar shake installation works

How cedar shake installation works

1. Deck preparation and ventilation check. Cedar must breathe: it dries between rains through airflow beneath the shakes. Installers verify the deck is sound and may use spaced sheathing or a ventilation mat so moisture doesn't get trapped against the wood.
2. Underlayment base layer. A breathable base underlayment goes over the deck. Unlike tile or asphalt, the system is designed so some water reaches the felt — the felt's job is to shed it, not the wood's.
3. Interlayment and shake courses. Shakes are laid in overlapping courses with a strip of 30-lb felt (interlayment) between each course, offset so no felt is exposed. Each shake is individually fastened — typically two corrosion-resistant nails or staples per piece.
4. Keyways and spacing. Shakes are spaced about 3/8 inch apart at the butts (keyways) to allow expansion. This spacing is deliberate — tight-laid cedar buckles as it swells.
5. Flashing, ridge, and hips. Step flashing at walls, valley metal, and ridge caps go on as the courses reach them. Ridge treatment is often a doubled shake or manufactured cap for weather protection.
6. Treatment application. Fire-retardant, preservative, or water-repellent treatments are applied after installation (or the shakes arrive factory-treated). This Old House notes finishing treatments run $200–$1,000 depending on product and application.

4. What affects the cost

Wood grade

Grade is the single biggest material variable. Common grade includes knots, sapwood streaks, and character marks — rustic and cheapest. Select grade is 80% straight grain with limited knots. 100% straight grain is clear, vertical-grain wood with minimal defects and the most refined look. HomeAdvisor notes straight grain lasts longer than Common, which makes sense: knots are where shakes split first. The grade must be named in your contract — a quote that just says 'cedar shakes' lets the contractor choose, and they'll choose Common.

Fire-retardant treatment and code

Untreated cedar carries no meaningful fire rating, and many jurisdictions in California, Colorado, and other wildfire states require Class A fire-rated roofing — which cedar can achieve only with factory-applied fire-retardant treatment. Field-applied spray treatments exist ($1.50–$3 per sq ft professionally applied, lasting 3–5 years) but generally don't satisfy code for new roofs the way factory treatment does. In fire zones this isn't optional trim; it's the difference between a permitted roof and a rejected one. Confirm your local requirement before falling in love with the material.

Ongoing maintenance burden

This is the cost buyers underestimate. Cedar needs debris cleared, gutters cleaned, and moss treated regularly; This Old House puts routine cleaning around 40 cents per sq ft once or twice yearly plus a deep cleaning every five to seven years. Industry sources budget $300–$800 per year in maintenance for an average home, and preservative re-oiling every 3–5 years in harsh exposures. A neglected cedar roof in a damp, shaded lot can fail in 15–20 years; a maintained one reaches 30–50. Price the maintenance, not just the installation.

Climate and exposure

Cedar performs best with sun and airflow — it needs to dry between wettings. Heavily shaded lots, persistent humidity (Gulf Coast, Pacific Northwest), and northern exposures accelerate moss, mildew, and rot, shortening life toward the 25-year end of the range and raising maintenance spend. In dry, sunny climates like much of the West, cedar thrives with minimal intervention. Your microclimate — tree cover, orientation, rainfall — matters as much as your region.

Ventilation design

Cedar rots from beneath when trapped moisture can't escape, so the ventilation strategy is part of the roof system, not an accessory. Proper installations maintain airflow under the shakes — through spaced sheathing, ventilation mats, or a vented ridge — and keep attic ventilation balanced. A contractor who treats cedar like asphalt (direct-nailed over solid decking with no drying path) is building a 15-year roof. Ask how the assembly dries; the answer should be specific.

Specialist labor scarcity

Fewer roofers install cedar well than install asphalt competently, and the skill gap shows in the work — improper exposure, missing interlayment, and wrong fasteners are the classic failure modes of amateur cedar jobs. In markets where cedar is rare, expect a scarcity premium of 20–40% over baseline labor (HomeGuide's urban-versus-rural differential applies here). The cheapest cedar quote is often the most expensive roof; prioritize contractors who do cedar weekly, not yearly.

Insurance and resale considerations

Some insurers in wildfire states surcharge or decline wood roofs, even treated ones — get an insurance quote before committing, not after. On resale, a well-maintained cedar roof is a genuine asset in upscale and historic neighborhoods, where buyers pay for the look. But an aging, moss-covered cedar roof reads as a $25,000 liability to buyers and inspectors alike. Cedar rewards owners who maintain it and punishes those who don't, including at sale time.

Shake versus shingle versus synthetic

Hand-split shakes are thicker and more rustic than taper-sawn shingles, costing $2–$5 more per sq ft installed with deeper shadow lines. Taper-sawn shingles give a smoother, more uniform look for less money. Synthetic cedar-look products (polymer or composite) run $8–$14 per sq ft installed, need almost no maintenance, and carry Class A fire ratings — but they don't age like real wood, and purists (and some historic districts) reject them. Choose based on how much maintenance you'll actually do.

5. Saving money & hiring right

Questions to ask your contractor

• What exact grade of shake are you quoting — Common, Select, or 100% straight grain — and will it be named in the contract?
• Is the material factory-treated for fire, and what fire rating will the finished roof carry for my jurisdiction?
• What interlayment and base underlayment are you using, and how does the assembly ventilate and dry?
• What fasteners are specified — stainless steel or hot-dipped galvanized — and why is that your choice for this climate?
• How many cedar roofs does your crew install in a typical year, and can I visit one that's at least five years old?
• What maintenance schedule do you recommend for my exposure, and what will it cost me annually?
• How do you handle moss treatment — and do you ever pressure wash cedar? (The right answer involves low-pressure washing, not a pressure washer.)

6. How costs vary by state

Cedar pricing follows both labor markets and how much maintenance the local climate demands. The Pacific Northwest has the deepest cedar tradition; wildfire states add treatment costs; humid states add maintenance.

7. Frequently asked questions