What Is a Cedar Shake Roofing System?
A cedar shake roofing system is a layered wood roofing system made from natural cedar shakes installed in overlapping courses. Unlike uniform materials, cedar shakes vary slightly in thickness, width, and shape. This variation creates the natural texture and appearance cedar roofing is known for.
A complete system includes:
- Underlayment for water protection
- Proper spacing for airflow
- Layered shake installation
- Custom flashing at all transitions
- Ventilation components
Because cedar is a natural material, it absorbs and releases moisture. Without proper airflow and installation, moisture can become trapped, leading to premature deterioration.
How a Cedar Shake Roof Is Installed and Why Each Step
Matters
Every project begins with a complete tear-off of the existing roofing system. All materials— including shingles, underlayment, flashings, vents, and accessories—are removed. Nothing is reused. This ensures a clean surface and eliminates weak points.
Once removed:
The roof decking is fully inspected, and Any damaged or compromised wood is replaced.
A solid deck is critical because cedar shakes rely on proper fastening and spacing for long-term performance.
1
Underlayment Installation
Underlayment is installed across the roof deck. This layer provides a secondary barrier against moisture beneath the cedar shakes. Because cedar is not a sealed system, this protection is essential in case water penetrates between shakes.
2
Spacing and Ventilation Setup
Proper spacing is built into the system. This is critical because cedar absorbs moisture. Without airflow, moisture can become trapped, leading to rot, mold, and reduced lifespan.
Spacing allows the roof to dry naturally.
3
Starter Course Installation
A starter course is installed at the eaves. This ensures proper alignment and helps the roof shed water correctly from the beginning.
4
Cedar Shake Installation
Cedar shakes are installed in overlapping courses. Each shake is placed with proper spacing and alignment. Because cedar varies naturally, installation must be consistent to maintain both appearance and performance.
5
Flashing Installation
All flashing is installed new at: This encompasses Chimneys, Walls, Valleys, Skylights and Roof penetrations.
Flashing is one of the most important parts of the system because most leaks occur at transitions.
Why Copper Flashing Matters on Cedar Shake Roofing
One of the most important details in a cedar shake roofing system is the type of flashing used throughout the roof. Cedar shake roofs are designed to last 30–40+ years when properly installed. Because of this, the flashing system must be able to perform for the same duration.
Lower-grade metals, such as standard aluminum, can weaken or deteriorate over time— especially in areas exposed to moisture and temperature changes. When flashing fails, it can lead to leaks in the most vulnerable areas of the roof. For cedar shake roofing, we strongly recommend copper flashing.
Copper offers:
- Extremely long lifespan, often outlasting the cedar itself
- High resistance to corrosion
- Strong performance in valleys and transitions
- Long-term durability in exposed conditions
Using copper flashing helps ensure the roofing system performs as intended over time and reduces the risk of premature failure in critical areas.
6
Ridge and Ventilation Components
Ridge areas are completed with proper ventilation. This helps regulate heat and moisture within the system.
7
Final Inspection and Cleanup
This encompasses Roof is inspected, Site is cleaned, Debris is removed and Final walkthrough completed.
Completed cedar shake installation — stone colonial property with copper valley flashing, fresh-cut natural wood throughout
Left: Shelby Roofing crew mid-installation · Right: Before & after cedar shake replacement
Types of Cedar Shake Roofing We Offer
Hand-Split Cedar Shake (Traditional Option)
Best when:
A rustic appearance is desired.
Advantages:
Thick profile, and Natural texture.
Taper-Sawn Cedar Shake (Refined Option)
Best when:
A cleaner, more uniform look is preferred.
Advantages:
Smooth surface, and Consistent appearance.
Hand-Split vs Taper-Sawn Cedar Shake
Feature Hand-Split Taper-Sawn Look Rustic Clean Texture Rough Smooth Profile Thick Uniform
How Long Does a Cedar Shake Roof Last?
25–40+ years.
Depends on:
Installation, Ventilation, and Maintenance.
How Much Does Cedar Shake Roofing Cost?
Depends on:
- Size
- Complexity
- Material
- Installation details
Inspection required.
Warranties That Protect Your Investment
Manufacturer warranty, and Shelby workmanship warranty.
Both transferable
Why Proper Installation Matters More Than Material
Cedar requires:
- Proper spacing
- Ventilation
- Moisture control
- Flashing precision
Permits and Why They Matter
Ensures:
Licensing, Insurance, and Code compliance.
Job Site Protection, Cleanup, and Final Walkthrough
- Dumpster with protection
- Continuous cleanup
- Nail removal
- Final walkthrough
What Sets Shelby Roofing Services Apart
We guide based on:
Appearance, Budget, and Longevity.
We provide:
- Documentation
- Drone inspections
- Custom flashing
- Clear communication
the Greater Philadelphia Area
Frequently Asked Questions
Does cedar need maintenance?
Yes, periodic care extends lifespan
Is it worth it?
Yes for appearance and value
Do you reuse materials?
No
Schedule a Cedar Roof Inspection
We provide detailed inspections and recommendations tailored to your property.
