The question of whether roofing staples are illegal hinges on the job type, local codes, and manufacturer guidelines. In the United States, there is no nationwide ban on roofing staples for all applications, but using staples can be inappropriate or prohibited for certain roofing components and under specific warranty terms. This article explains when staples are allowed, where they are discouraged, and what installers should consider to stay compliant and protect roof performance.
Overview Of Roofing Fasteners And Their Purpose
Roofing projects rely on fasteners to secure materials against wind, rain, and gravity. The two most common fasteners for asphalt shingles are nails and staples, with nails generally preferred for longevity and wind resistance. Nails used for shingles are typically galvanized, vacuum-sealed, and installed with a precise length to penetrate the deck and engage the sheathing beneath. Staples are less durable in high-wind conditions and can damage the shingle surface if not used correctly. Underlayment or roof felt, however, may be fastened with either nails or staples depending on the product and local code requirements.
Staples Versus Nails: Key Differences For Shingle Installation
Shingles: For asphalt shingles, most manufacturers and roofing standards favor nails. Staples may void manufacturer warranties because they do not secure shingles as reliably against uplift and wind-blown debris. In many installation manuals, staples are explicitly discouraged or banned for securing shingles.
Underlayment: Felt or synthetic underlayment can be fastened with staples in some regions or for certain products. When staples are allowed for underlayment, the staples must be corrosion-resistant and properly sized to avoid tearing the material or causing leaks. Always check the underlayment manufacturer guidance.
Other Roofing Materials: For metal roofs, tile, or rubber roof systems, fasteners vary widely and often require specialized screws, concealed-fastener systems, or other methods. Staples are uncommon for these materials and generally not the standard method.
What Builders And Manufacturers Say
Guidance from leading organizations and manufacturers emphasizes best practices for durability and warranty protection. The Asphalt Roofing Manufacturers Association (ARMA) and the National Roofing Contractors Association (NRCA) commonly advise against using staples for asphalt shingles and encourage nails with the appropriate shank type and length. Individual shingle brands—such as GAF, CertainTeed, and Tamko—typically provide installation guides that specify nails, not staples, for fastening shingles to meet warranty terms and wind-resistance requirements. Failing to follow these guidelines can void warranties and lead to performance issues during storms or heavy rainfall.
Code Compliance And Warranty Implications
Local building codes vary by state and municipality. Some jurisdictions adopt or adapt the International Residential Code (IRC) provisions, which focus on fastener type, length, and spacing. In many cases, the IRC does not expressly ban staples, but it does require that fasteners be suitable for the material and climate. More importantly, manufacturers’ installation instructions take precedence on product-specific requirements. If staples are not approved by the shingle manufacturer, using them can void the warranty and may fail code compliance during inspections.
Warranties are a critical consideration. Roofing warranties often specify that using non-approved fasteners will void warranty coverage. In practical terms, even if local codes allow staples for certain applications, installing shingles with staples could mean homeowners bear the cost of future repairs that would otherwise be covered under warranty. Before starting a project, verify both the local code and the manufacturer’s installation instructions.
Regional Variations And Practical Guidance
Regional climate influences fastener choices. Areas with high wind, heavy snowfall, or seismic activity may have stricter requirements for wind uplift resistance, favoring nails with specific specifications over staples. For example, hurricane-prone regions often enforce stricter wind-resistance standards, making nails the more reliable option. In milder climates, some permits or inspectors may be more flexible, but the manufacturer’s guidance remains a decisive factor for warranty and performance.
Practical guidance for homeowners and contractors:
- Always consult the specific shingle manufacturer’s installation instructions before choosing fasteners.
- Prefer nails with the correct gauge, length, and corrosion resistance for your deck material and climate.
- For underlayment, confirm whether staples are permitted on the product you are using.
- Document fastener type and installation details in project records to support warranty claims.
- When in doubt, contact the local building department or a licensed roofer to ensure compliance with codes and warranties.
Common Questions About Roofing Staples
- Are roofing staples illegal in the United States? No nationwide ban exists, but staples are often discouraged or prohibited by manufacturers for asphalt shingles and may fail to meet local code or warranty requirements.
- Can staples be used for underlayment? In some regions and with certain products, staples are permissible for underlayment. Always follow the underlayment manufacturer’s instructions and local code requirements.
- Will using staples void a shingle warranty? Yes, if the shingle manufacturer prohibits staples or requires nails, using staples can void the warranty.
- What should I do to ensure compliance? Check the roofing product’s installation guide, local building codes, and consult a licensed roofer or building inspector for confirmation.
Takeaway For Homeowners
While not universally illegal, roofing staples are not commonly recommended for asphalt shingle installations in the United States. Manufacturer guidance and local codes largely favor nails for shingles due to wind resistance and warranty protection. For underlayment, staples may be acceptable in some cases, but verification is essential. To minimize risk and maximize roof performance, adhere to manufacturer instructions, obtain any needed permits, and rely on experienced professionals for installation. This approach helps ensure durability, code compliance, and warranty integrity over the roof’s lifespan.