Wood Shingle Calculator

Calculate wood shingle bundles for cedar, pine, and redwood roofing

Get a fast bundle count from your roof area

Quick presets

sq ft

You Need

53 bundles

15.8 squares • 1,581 sq ft roof area

Estimated Cost Range

$1,739 – $2,609

PRO

Professional Calculator

Complete bill of materials with all accessories and waste calculations

sq ft

Total Materials Cost

$3,607

Shingle Bundles

66

Roof Area

1,973 sq ft

Roofing Squares

19.7

Cost Breakdown

Shingles: $2,750 (76%)
Underlayment: $135 (4%)
Ice & Water: $440 (12%)
Trim & Flashing: $217 (6%)
Fasteners & Starter: $65 (2%)

Detailed Breakdown

Shingle Bundles66 bundles (architectural)
Coverage2,170 sq ft incl. 10% waste
Underlayment3 rolls (synthetic)
Ice & Water Shield8 rolls (2 rows)
Drip Edge22 pieces (10 ft each)
Ridge Cap2 bundles (50 ft)
Starter Strip1 rolls (100 ft eave)
Flashing4 pieces
Chimney4 pieces
Skylight0 pieces
Valley0 pieces (0 ft)
Roofing Nails1 boxes (~7,200 nails)
Total Material Cost$3,607
How to Use This Calculator
The Wood Shingle Calculator helps you determine the exact number of bundles and squares of wood shingles to order, with cost estimates that include fire retardant treatment and specialized labor.

Quick Estimate tab: Enter your total roof area and pitch. The calculator uses the standard 4 bundles per square for 16-inch No. 1 Blue Label cedar shingles at 5-inch exposure, applies your waste factor, and gives you a bundle count. This is the fastest way to get a ballpark for ordering.

Detailed tab: Select your wood species (western red cedar, Alaskan yellow cedar, eastern white cedar, southern yellow pine, or redwood), grade, exposure by pitch, and fire retardant treatment option. The calculator adjusts the coverage per bundle based on exposure and shingle length to give you a precise order quantity. Use this when you have finalized your specifications.

Cost Estimate tab: Enter your roof area, wood species, treatment level, and state. The calculator produces a comprehensive cost breakdown: wood shingle materials, fire retardant treatment upcharge, underlayment, accessories, specialized labor (wood shingle installation is slower than asphalt), and disposal. All pricing reflects 2026 US market rates.

The Formula
The wood shingle calculation uses these formulas:

Actual Roof Area = Footprint Area × Pitch Multiplier For 1,500 sq ft footprint at 5/12 pitch: 1,500 × 1.0833 = 1,625 sq ft

Squares = Actual Roof Area / 100 1,625 / 100 = 16.25 squares

Bundles (16" shingles at 5" exposure) = Squares × 4 × (1 + Waste%) 16.25 × 4 × 1.15 = 74.75 -> 75 bundles (Wood shingles typically require 4 bundles per square at standard exposure)

Material Cost = Squares × Price per Square 16.25 × $230 (western red cedar No. 1) = $3,738

Fire Treatment = Squares × Treatment Cost per Square 16.25 × $75 (factory pressure-treated) = $1,219

Total Installed Cost = Materials + Treatment + Labor + Accessories $3,738 + $1,219 + $8,125 (labor @ $500/sq) + $1,500 (accessories/underlayment) = $14,582
Example Calculation
Example: Craftsman Home in Oregon

David is replacing the wood shingle roof on his 1,500 sq ft Craftsman-style home in Portland. He wants No. 1 Blue Label western red cedar with a Class A fire assembly (required by Oregon code in his area). The roof has a 6/12 pitch.

Step 1: Calculate actual roof area Footprint area: 1,500 sq ft Pitch multiplier (6/12): 1.1180 Actual roof area: 1,500 × 1.1180 = 1,677 sq ft

Step 2: Determine bundles needed Squares: 1,677 / 100 = 16.77 Bundles (4 per square for 16" shingles at 5" exposure): 16.77 × 4 = 67.08 With 15% waste (complex Craftsman roofline): 67.08 × 1.15 = 77.1 -> 78 bundles

Step 3: Estimate total cost
• Cedar shingles (No. 1 Blue Label): 16.77 sq × $250 = $4,193
• Fire retardant treatment (Class A assembly): 16.77 × $120 = $2,012
• Fire-resistant underlayment: $1,200
• Skip sheathing / ventilation mat: $1,800
• Labor (specialized, 16.77 sq × $500/sq): $8,385
• Tear-off and disposal: $2,500
• Permit: $350
• Total installed cost: ~$20,440
• Cost per square foot: ~$12.19

Frequently Asked Questions

What is the difference between wood shingles and cedar shakes?
Wood shingles are machine-sawn on both sides to a uniform taper, producing a smooth, flat surface. Cedar shakes are hand-split (or split-and-resawn) on at least one face, creating a rough, textured surface. Shingles are thinner (typically 3/8" at the butt), shakes are thicker (3/4" to 1-1/4" at the butt). Shingles give a refined, even look; shakes give a rustic, heavy-shadow look. Shingles use tighter exposure (5" vs 7.5-10" for shakes) and cost somewhat less. Both are typically Western red cedar.
Do wood shingles meet fire codes in 2026?
Untreated wood shingles are Class C fire rated at best and are banned in many areas, including all WUI (Wildland-Urban Interface) zones and entire states like California. Factory pressure-treated shingles can achieve Class B or C fire rating. A Class A roof assembly — which combines treated shingles, a fire-resistant underlayment, and sometimes a gypsum layer — is required in California, Colorado, Oregon (urban areas), and many other jurisdictions. Always check your local fire code before specifying wood shingles.
How long do wood shingles last?
Properly installed No. 1 Blue Label western red cedar shingles last 30-40 years. Alaskan yellow cedar can reach 40-50 years. Redwood shingles last 35-45 years. Southern yellow pine, even when treated, lasts 20-25 years. Lifespan depends heavily on climate, ventilation, moss/algae control, and periodic maintenance. Wood shingles in the Pacific Northwest (wet climate) may need moss treatment every 3-5 years. In arid climates like the Southwest, UV degradation is the primary concern. Proper ventilation underneath the shingles (using skip sheathing or a ventilation mat) can add 10+ years to the life of a wood roof.
How do I maintain a wood shingle roof?
Wood shingle roofs require more maintenance than asphalt. Annual tasks include: (1) Clear debris (leaves, branches, pine needles) that traps moisture; (2) Trim overhanging branches to reduce shade and debris; (3) Apply moss/algae treatment (zinc or copper strip, or chemical spray) every 2-3 years; (4) Replace split, curled, or missing shingles promptly; (5) Apply a UV-protective wood preservative every 5-7 years (optional but extends life); (6) Ensure gutters drain properly and there is no standing water. Budget $200-500/year for maintenance on an average wood shingle roof.
How much do wood shingles cost compared to asphalt?
Wood shingles are 2-4 times more expensive than asphalt shingles when fully installed. Materials alone: western red cedar No. 1 Blue Label runs $180-280 per square (2026) vs $85-115 for architectural asphalt. Labor is also higher because wood shingle installation is slower and requires experienced craftsmen — expect $400-600/sq for wood shingle labor vs $280-350/sq for asphalt. A 1,500 sq ft cedar shingle roof costs $18,000-28,000 installed vs $9,000-15,000 for architectural asphalt. However, wood shingles last 30-40 years and add significant curb appeal and home value.

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