Cedar Shake Roof Cost Calculator

A cedar roof typically runs $12 to $20 per square foot installed (materials, labor, underlayment, and standard accessories), so a 2,000 sq ft roof is about $24,000 to $40,000 depending on the cedar grade, roof complexity, and region. Entry-level sawn cedar shingles start around $6–$8/sq ft, while premium hand-split shakes and Blue Label grades reach $15–$18/sq ft. Cedar is well above asphalt shingles ($4–$7/sq ft) but offers superior looks, longevity, and insulation. The drivers are the material grade (the biggest), the roof size, the pitch, and whether the old roof must be torn off. Enter your roof size, material, pitch, and tear-off in the calculator to anchor the estimate.

Cedar shingles are machine-sawn on both sides — thinner, smoother, and uniform, for a refined, tailored New England look that lays flat. Cedar shakes are split (traditionally by hand, now often hydraulically) on at least one face, giving a thicker, rougher, more textured and rustic appearance with deep shadow lines. Shakes are thicker at the butt (about 1/2"–3/4" vs. 3/8"–1/2" for shingles), more durable, and more expensive. Choose shingles for a clean, traditional look at a lower cost; choose shakes for a rugged, dimensional appearance and longer life. The calculator prices sawn shingles, medium hand-split shakes, heavy #1 shakes, and premium Blue Label grade.

A properly installed and maintained cedar roof lasts 30–40 years, and premium grades in favorable climates can exceed 50. Lifespan depends on the grade (No. 1 Blue Label, with the clearest vertical-grain wood, lasts longest), the climate (cedar thrives in dry climates with good airflow; humid or heavily shaded roofs invite moss and rot), the installation (proper spacing and a ventilated assembly are critical), and maintenance (periodic cleaning, treatment, and replacing damaged shakes). Without maintenance, a cedar roof may last only 20–25 years. The grade you choose and the ventilation detail are the two factors most within your control for maximizing lifespan.

More than asphalt or metal — that ongoing care is part of the true cost of cedar. Plan on: an annual inspection for cracked, curled, or missing shakes; periodic cleaning to remove moss, algae, leaves, and debris (every 2–4 years, more in humid or shaded conditions); applying a cedar preservative or fungicide treatment every 4–6 years to resist rot and UV degradation; keeping gutters clear and trimming overhanging branches to improve airflow and reduce shade; and promptly replacing damaged individual shakes before they leak. Neglected cedar deteriorates fast, so factor this maintenance into your decision and budget — it's the difference between a 20-year and a 40-year roof.

Untreated cedar is combustible — a real concern, especially in wildfire-prone regions. Fire-retardant treated (FRT) cedar is available with Class B or C ratings (and Class A over a fire-resistant underlayment assembly), and pressure-impregnated treatment adds roughly $1–$1.50/sq ft. Many jurisdictions in high-fire areas require treated cedar or prohibit cedar roofing entirely, and some insurers charge higher premiums or decline coverage for untreated cedar — so always check local building codes and your insurer before specifying it. The calculator includes a Class B/C fire-treatment add-on. In wildfire zones, treated cedar (or a synthetic alternative) is often the only practical or permitted choice.

It's strongly discouraged and often prohibited by code. Cedar needs a ventilated installation — airflow beneath it to dry after rain and prevent rot — and laying it over an existing roof (especially asphalt) traps moisture, drastically shortening its life and voiding most warranties. Proper cedar installation means tearing off down to the deck, inspecting and repairing the decking, installing a breathable underlayment (or a spaced-sheathing/batten system for maximum ventilation), then installing the shakes. So when replacing an existing roof with cedar, always budget a full tear-off — the calculator includes one- and two-layer tear-off options for exactly this.

Spaced (or 'skip') sheathing nails 1x4 or 1x6 boards horizontally across the rafters with gaps between them, instead of solid plywood. The gaps let air circulate behind the shakes so they dry quickly after rain — the traditional, preferred method for cedar, especially in humid climates, and key to a long lifespan. For solid-deck installs, the alternative is a ventilated underlayment mat (like Cedar Breather) that creates an air gap between the deck and the shakes. Either ventilation method is strongly recommended; installing cedar directly on solid sheathing without a ventilation gap leads to premature rot. The calculator's premium-underlayment add-on covers a ventilation mat for solid-deck installs.

Synthetic cedar (polymer, composite, or rubber) mimics the cedar look at a lower lifetime cost. Synthetics run about $8–$14/sq ft installed — comparable to or slightly below real cedar — but require virtually no maintenance, carry Class A fire ratings, resist insects and rot, and often come with 50-year warranties. The trade-off is authenticity: modern synthetics are convincing, but purists and historic-home owners prefer the genuine texture, aging patina, and natural variation of real cedar. If you want the cedar look without the maintenance and fire concerns — or you're in a fire zone — synthetics are increasingly popular and worth comparing. This calculator prices real cedar; weigh it against a synthetic-shake quote.

For the right home and climate, yes. Cedar offers outstanding natural beauty and curb appeal that can raise home value, excellent natural insulation (roughly twice the R-value of asphalt), strong wind resistance when properly installed, and a long lifespan with care. The trade-offs are the high upfront cost, ongoing maintenance, and fire considerations. Cedar is most worth it for higher-end, historic, or architectural-style homes where appearance is paramount, and for owners in dry climates willing to maintain it. In wildfire-prone areas or for budget-conscious projects, treated cedar, a synthetic alternative, or asphalt may be more practical. The calculator helps you weigh the cedar cost against those benefits.

Cedar is skilled, slow handwork, and the quality of the install directly determines how long the roof lasts — so the labor share is high. Each shake is individually placed with correct spacing and exposure; the assembly must be ventilated (spaced sheathing or a mat); valleys, hips, ridges, chimneys, and walls all need careful custom flashing and cutting; steep roofs require fall protection and staging that slow the crew; and a tear-off of the old roof adds removal and deck repair. Critically, experienced cedar roofers are increasingly specialized — a general asphalt crew often lacks the ventilation and detailing know-how cedar demands. Because install quality dictates lifespan, hiring a proven cedar roofer is worth paying more for, even though the calculator's rate already reflects skilled labor.