Cedar shake roofs are a popular choice for homeowners seeking a blend of aesthetic appeal, durability, and insulation. Proper installation is crucial to ensure the roof's longevity and performance. This article provides a detailed guide on cedar shake roof installation, drawing from authoritative sources to outline the key steps, tools, and best practices.
Overview of Cedar Shake Roofing
Cedar shake roofs are constructed from natural wood, typically sourced from cedar trees. These roofs are known for their rustic appearance and longevity, making them a preferred option for those who value both form and function. Unlike cedar shingles, which are thinner and more uniform, cedar shakes are thicker and hand-split, providing better insulation and durability. They are naturally resistant to insects and decay, and their unique appearance can significantly enhance a home's curb appeal.
The installation of a cedar shake roof involves several critical steps, including preparing the roof deck, installing underlayment, laying the starter course, and installing the shakes themselves. Each step must be executed with precision to ensure a watertight and durable roof. Additionally, proper maintenance is essential to extend the life of the roof and maintain its appearance.
Preparing for Installation
Before beginning the installation, it is essential to prepare the roof deck and gather the necessary tools and materials. The roof deck must be inspected for any signs of damage or rot. Any damaged sections should be replaced with new plywood or oriented strand board (OSB) to create a solid foundation. This step is crucial because a damaged roof deck can compromise the integrity of the entire roofing system.
In addition to inspecting the roof deck, it is important to obtain any necessary permits from the local building authority. Permits ensure that the installation meets local building codes and regulations. Failure to obtain the required permits can result in fines or the need to remove and reinstall the roof.
Planning the layout is another critical step in the preparation process. Measuring the roof's dimensions and calculating the number of cedar shakes needed ensures that the right amount of material is ordered. Using a chalk line to mark guidelines on the roof deck helps ensure that the shakes are installed evenly and with proper spacing.
Tools and Materials Required
Having the right tools and materials on hand is essential for a successful cedar shake roof installation. The following tools are commonly used during the installation process:
- Roofing hammer: Used to drive nails into the cedar shakes.
- Utility knife: For trimming excess underlayment or shakes.
- Tape measure: To measure the roof and ensure proper spacing.
- Chalk line: For marking guidelines on the roof deck.
- Ladder: For accessing and working on the roof safely.
- Safety harness: To ensure the safety of the installer while working at heights.
In addition to the tools, the following materials are required for the installation:
- Cedar shakes: The primary material used for the roof.
- Roofing underlayment: Provides an additional layer of protection against moisture.
- Roofing nails: Used to secure the shakes to the roof deck.
- Drip edge: A metal strip that directs water away from the roof.
- Ridge cap shingles: Used to cover the peak of the roof and protect it from moisture and wind.
Step-by-Step Installation Process
1. Installing the Perimeter Metals
The first step in the installation process is to install the perimeter edge metals. This includes the drip edge, which is a metal strip that runs along the bottom edge of the roof. The drip edge helps direct water away from the roof and prevents damage to the fascia board. It also provides an additional layer of protection against water damage, especially in areas where rainwater runs into the gutters.
2. Installing the Underlayment
Once the perimeter metals are in place, the next step is to install the roofing underlayment. The underlayment is a crucial component of the roofing system, as it provides an additional layer of protection against moisture and leaks. The underlayment is rolled out across the roof deck, starting at the bottom edge. Each row of underlayment should overlap by at least 6 inches to ensure complete coverage. The underlayment is secured with roofing nails to ensure it lies flat and smooth against the roof deck. Any excess material is trimmed with a utility knife.
3. Laying the Starter Course
The starter course is the first row of cedar shakes installed along the bottom edge of the roof. This row serves as the foundation for the rest of the installation. Before laying the starter course, a drip edge is installed along the bottom edge of the roof. The first row of cedar shakes is laid with the thick end facing down, ensuring that each shake overlaps the one below it by at least 1 inch. The shakes are secured with roofing nails, with two nails per shake placed about 1 inch from the edges.
4. Installing the Cedar Shakes
With the starter course in place, the installation of the remaining cedar shakes can begin. The process starts at the bottom edge of the roof and works upward, following the chalk lines to ensure proper alignment. Each row of shakes should overlap the previous row by at least 10 inches to create a watertight seal. A roofing hammer is used to drive nails into each shake, with two nails per shake positioned about 1 inch from the edges. It is important to stagger the seams between rows to create a more natural and visually appealing look.
5. Finishing Touches
The final step in the installation process is to add the finishing touches, including the ridge cap and any necessary trim. The ridge cap is installed along the peak of the roof to protect the ridge from moisture and wind. Each ridge cap shingle is overlapped by at least 1 inch and secured with roofing nails. Trim pieces such as fascia and soffit are added to complete the look of the cedar shake roof. These pieces help protect the edges of the roof and provide a finished appearance.
Maintenance and Common Mistakes to Avoid
Proper maintenance is essential to ensure the longevity and performance of a cedar shake roof. Regular inspections should be conducted to identify and address any potential issues, such as loose or damaged shakes. Cleaning the roof periodically to remove debris, moss, and algae is also important. A soft-bristle broom or low-pressure washer can be used for this purpose to avoid damaging the shakes.
Promptly repairing any damaged or missing shakes is crucial to prevent water infiltration and further damage to the roof. Neglecting repairs can lead to more extensive and costly issues over time.
Avoiding common mistakes during the installation process can help ensure a successful and long-lasting cedar shake roof. One common mistake is improper spacing, which can lead to buckling and warping. Ensuring that the shakes are properly spaced allows for expansion and contraction due to temperature changes.
Another mistake is incorrect nailing, which can result in loose shakes and potential leaks. Using the correct type and length of nails is essential for securing the shakes properly. Neglecting ventilation is another pitfall to avoid. Proper ventilation is crucial for preventing moisture buildup and extending the life of the roof. Ensuring that the attic is adequately ventilated helps maintain a healthy environment for the roof.
Conclusion
Cedar shake roof installation is a complex process that requires careful planning, the right tools and materials, and attention to detail. By following the steps outlined in this guide, homeowners and contractors can ensure a durable and aesthetically pleasing roof. Proper maintenance and avoiding common mistakes further contribute to the roof's longevity and performance. Cedar shake roofs offer a unique, timeless look that can enhance a home's curb appeal while providing excellent insulation and protection against the elements.