Bundle of Cedar Shingles: Coverage, Estimating, and Installation

A bundle of cedar shingles can cover very different amounts of roof or wall, depending on shingle size, exposure, grade, and the manufacturer’s packaging. That makes the label—not a generic online estimate—the best place to start when planning a project. Understanding bundle coverage, waste, installation requirements, and the difference between shingles and shakes can help homeowners compare products and order more accurately.

What Is a Bundle of Cedar Shingles?

A bundle is a packaged quantity of individual wood shingles sold for roofing or siding. Cedar shingles are sawn, generally smooth and uniform in thickness. They are not the same as cedar shakes, which are typically split or have a more textured appearance. Some products marketed as shakes are sawn on one face and split on the other, so buyers should check the product description.

Bundles do not all contain the same number of shingles or cover the same area. Coverage depends on the shingle’s length and width, the portion left exposed after installation, and how the manufacturer packages that product. A bundle may be labeled by its coverage at a specific exposure, by the number of shingles, or by another unit. Those figures should not be treated as interchangeable.

For roofing, suppliers commonly describe coverage in square feet at a stated exposure. A roofing square equals 100 square feet, but that does not mean every bundle covers one-quarter of a square. A bundle advertised to cover 25 square feet at one exposure may cover less when installed with a smaller exposure, or more at a greater exposure if the product and installation instructions allow it.

How Much Does a Bundle of Cedar Shingles Cover?

There is no universal coverage figure for a bundle of cedar shingles. Coverage varies with the product, grade, intended use, and installation layout. Even two bundles of the same nominal shingle length may have different labeled coverage if they are designed for different exposures or applications.

When checking a product label or specification sheet, look for:

• Coverage per bundle: The stated area, usually in square feet, for the specified installation.
• Exposure: The visible portion of each shingle after successive courses overlap.
• Shingle size: Length and width affect how much material can be installed across a surface.
• Application: Confirm whether the product is intended for roofing, siding, or both.
• Grade and packing details: The usable quantity and appearance can vary by product and grading rules.

If the package does not show coverage, request the manufacturer’s installation instructions or ask the supplier to confirm the coverage at the planned exposure. A salesperson’s estimate is useful for planning, but the product documentation should guide ordering and installation.

How to Estimate the Number of Bundles

For a simple surface, divide the area to be covered by the product’s labeled coverage per bundle. Then add an allowance for cuts, defects, and layout waste. The appropriate allowance depends on roof or wall complexity, shingle quality, and installer experience; it is not a fixed amount for every project.

1. Measure the surface. For a rectangular wall, multiply its width by its height. For a gable, calculate the rectangle and triangle separately. For a roof, measure each plane rather than relying only on the home’s floor area.
2. Subtract openings where appropriate. Large windows and doors may reduce siding area. Small openings may have little effect on ordering because cutting and edge work still generate waste.
3. Confirm coverage at the planned exposure. Use the figure for the exact product and installation method.
4. Divide total area by coverage per bundle. Round up to a whole bundle.
5. Add a project-specific waste reserve. Account for valleys, hips, dormers, roof edges, wall corners, pattern selection, and future repairs.

Example: If a roof plane measures 600 square feet and the chosen bundle is labeled to cover 25 square feet at the intended exposure, the base calculation is 600 ÷ 25, or 24 bundles. The final order may need additional bundles for cuts and project complexity. This example is illustrative; the product label determines actual coverage.

For a roof with multiple planes, calculate each plane separately and add the results. Complex roof geometry often creates more offcuts than a simple gable roof. For siding, include corners, gables, trim details, and the manufacturer’s recommended layout. A roofing contractor or experienced supplier can help check measurements before a large order.

Exposure, Course Layout, And Installation

Exposure is a key factor in cedar shingle coverage. Each course overlaps the one below it, leaving only a portion of the shingle visible. A smaller exposure uses more courses over a given height and therefore generally requires more shingles. A larger exposure can reduce material use, but it must remain within the product’s approved limits and suit the roof pitch and application.

Manufacturers specify installation details such as exposure, spacing between shingles, fastening, underlayment, and flashing. These instructions matter because cedar expands and contracts with moisture, and poor spacing or fastening can contribute to splitting, buckling, or water intrusion. Roofing and siding details differ, so a method suitable for one application should not automatically be used for the other.

Roof pitch, local weather, and building-code requirements also affect the assembly. Low-slope roofs may require different treatment or may not be suitable for a particular shingle system. Flashing around chimneys, valleys, skylights, and walls is especially important because shingles alone do not make these vulnerable transitions watertight.

Choosing Cedar Shingle Grade and Type

Cedar products are available in different species, grades, dimensions, and finishes. Western red cedar is a familiar choice in the United States, while other cedar species may be available depending on the region. Product characteristics, appearance, and performance depend on the species and specification, so the word “cedar” by itself is not enough to compare two products.

Grades describe qualities such as appearance, cutting, and allowable characteristics under the relevant grading rules. A higher appearance grade may be selected for a more uniform finish, while other grades may suit projects where variation is acceptable. Buyers should ask which grading standard applies and whether the bundle is intended for exposed architectural work or another use.

Shingles may be untreated or treated with preservatives or fire-retardant products. Treatment can affect appearance, installation, maintenance, and disposal. It does not automatically make a roof fireproof or eliminate the need to comply with local building codes. Check the product documentation and confirm that the specified assembly is approved for the property’s location.

Roofing Versus Siding Coverage

A bundle’s coverage for roofing should not be assumed to match its coverage for siding. Roof shingles are installed in courses according to roof-specific exposure and underlayment details. Siding shingles may use a different exposure, pattern, backing, or installation arrangement. Some products are designed only for one application.

For siding, the finished appearance depends on the chosen pattern, such as straight courses or staggered layouts, and on how the shingles are cut and spaced. For roofs, pitch, weather exposure, and waterproofing details are central. Before ordering, verify that the product is approved for the intended use and that the coverage figure corresponds to that use.

What Affects the Price of a Bundle?

The price of a bundle of cedar shingles depends on species, grade, dimensions, treatment, finish, availability, and location. Freight can be significant because bundles are bulky, and prices may differ between local lumberyards, roofing suppliers, and specialty manufacturers. A low bundle price may not represent the lowest project cost if coverage is smaller or the product requires additional accessories.

Compare products using their installed coverage and specification, not only the price per bundle. Check whether the quote includes delivery, underlayment, fasteners, flashing, starter materials, ridge materials, and any treatment or finish. For a full project estimate, labor and preparation can be substantial, particularly on steep or complex roofs.

Storage, Handling, And Maintenance

Cedar shingles should be handled and stored according to the manufacturer’s directions. Keep bundles protected from prolonged wetting and direct ground contact, while allowing suitable ventilation. Poor storage can contribute to staining, moisture problems, or damage before installation. Avoid sealing bundles in a way that traps moisture.

After installation, maintenance depends on the product, climate, nearby vegetation, and roof design. Leaves and debris can retain moisture, while overhanging branches may limit drying and cause physical damage. Periodic inspection can identify loose or damaged shingles, failing flashing, and drainage problems before they lead to leaks.

Cleaning or applying a coating is not automatically appropriate for every cedar roof. Some treatments can change the appearance or performance, and pressure washing can damage wood. Follow the manufacturer’s recommendations and consult a qualified roofing professional before applying a chemical treatment or coating.

Common Buying Mistakes to Avoid

• Using a generic bundle estimate: Coverage is product- and exposure-specific.
• Confusing shingles with shakes: Their manufacturing, texture, and installation details differ.
• Ignoring the labeled application: Roofing and siding products may not be interchangeable.
• Ordering from floor area alone: Roof slopes and wall geometry require surface measurements.
• Forgetting waste and repairs: Cuts, breakage, and future matching can require extra material.
• Skipping code checks: Fire classification, roof assembly, and local requirements vary.

Questions to Ask Before Ordering

Before purchasing, ask the supplier for the bundle’s coverage at the intended exposure, the shingle dimensions, species and grade, approved applications, and installation instructions. Confirm whether the product is treated, what accessories are required, how it should be stored, and whether the quoted price includes delivery.

For roofing, also verify that the product and installation comply with local building codes and any applicable fire requirements. The International Code Council publishes model building codes, but local jurisdictions adopt and amend codes independently. The local building department or a licensed contractor can confirm requirements for a specific property.

With those details in hand, estimating a bundle of cedar shingles becomes much more reliable. The most useful figure is not a broad average, but the manufacturer’s coverage for the exact product, application, and exposure planned for the project.

Sources And Further Information

• Cedar Shake & Shingle Bureau — product information and installation resources for cedar roofing and siding.
• International Code Council — model building codes and related resources; local adoption varies.
• National Association of Home Builders — homeowner and building-industry information.