Roofing nails with plastic washers are a common choice for securing shingles and other roofing materials. This guide explains what they are, why they’re used, and how to select and install the right type for American roofs. It covers materials, sizes, installation tips, code considerations, and maintenance to help homeowners and professionals make informed decisions.
What Is A Roofing Nail With Plastic Washer?
A roofing nail with a plastic washer is a fastener designed to secure roofing materials, typically asphalt shingles, to a roof deck. The plastic washer sits around the nail shank to seal the entry point and help prevent water intrusion. These washers can be made from nylon, polyethylene, or elastomeric compounds and are selected to resist weathering, UV exposure, and temperature fluctuations common in American climates.
Benefits Of Plastic Washer Nails
The plastic washer provides several advantages over metal-only nails. It helps create a watertight seal at the nail hole, reducing the risk of leaks in shingle installations. The washer can also distribute pressure more evenly across the shingle, decreasing the chance of splitting. In windy regions, the washer adds shear resistance and helps prevent uplift around fasteners. For metal-deck roofs, the combination can offer corrosion resistance and longer service life when paired with compatible nails.
Materials And Sizes
Plastic washers come in various materials, each with distinct properties. Nylon washers offer good flexibility and resistance to UV degradation. Polyethylene washers are economical and provide solid water sealing. Elastomeric washers may be used where additional elasticity is needed to accommodate movement and thermal expansion. Nail diameters commonly range from 0.105 to 0.135 inches, with lengths typically from 1 inch to 1 ¼ inches, depending on roof type and shingle thickness. The exact size should match the shingle manufacturer’s installation guidelines.
Installation Best Practices
Proper installation ensures the performance of roofing nails with plastic washers. Use a compressor or hammer with a steady strike to drive nails straight and flush without overdriving. Do not bend the washer or nick its edge, which can compromise sealing. Install nails per the shingle manufacturer’s pattern—usually two to four nails per shingle, depending on slope and wind zone. Maintain correct spacing along the eave and ridge lines to optimize wind uplift resistance. Inspect for loose or missing nails after severe weather and reseal if necessary.
Compatibility And Code Considerations
Compatibility depends on shingle type, roof slope, and local building codes. Some regions mandate metal-fastener systems or specific nails for high-wind zones. Always verify the roofing material’s installation instructions and the local code requirements for fastener type, length, and washer usage. In areas with heavy rainfall or freeze-thaw cycles, washers and nails must resist moisture ingress and corrosion. For metal roofs, ensure the washer material does not cause galvanic corrosion with the deck or panels.
Common Applications And Limitations
Plastic washer nails are commonly used for asphalt shingles, fiber cement, and some composite roofing products. They may be less suitable for heavy, overbuilt roofing systems or ultra-high wind zones without additional fasteners or mechanical anchors. In extreme temperatures or climates with extreme UV exposure, select washers engineered for long-term outdoor performance and confirm compatibility with the roofing underlayment. Keep in mind that not all manufacturers approve plastic washers for every product, so follow brand guidelines.
Maintenance And Replacement
Regular roof inspections should include checking all nail heads for corrosion, loosening, or missing washers. Look for lifted shingles or water staining around fasteners. If a washer shows UV degradation or cracking, replace the nail and reseal the area. Maintain ventilation to prevent condensation that can accelerate corrosion. In harsh climates, anticipate periodic maintenance cycles, especially after major storms, and document fastener inventory for future repairs.
Choosing The Right Nail For Your Roof
Selecting the right roofing nail with a plastic washer depends on shingle type, roof pitch, and climate. High-wind zones may require longer nails or additional fasteners. For asphalt shingles, ensure the chosen nail length penetrates the deck sufficiently to engage a secure bite without penetrating through the roof. Consider the washer’s compatibility with the shingle surface to avoid indentations or tearing. When in doubt, consult the shingle manufacturer’s installation guidelines or a licensed roofing professional to confirm the correct fastener combo.
Frequently Asked Questions
- Are plastic washers necessary? They provide a seal around the nail hole and help reduce water intrusion, though requirements vary by product and code.
- Do plastic washers deteriorate? Quality washers resist UV exposure and weathering, but all materials have a finite lifespan under harsh conditions.
- Can I mix brands? It’s best to match washer material and nail type to the manufacturer’s recommendations for optimal performance.
- What wind zones require special nails? Regions with high wind uplift may require longer nails, additional nails per shingle, or alternative fasteners per local codes.