The 1-1/2 inch coil roofing nail is a common choice for installing asphalt shingles, cedar shakes, and other roofing materials. This guide explains what these nails are, why the 1-1/2 inch length is often preferred, and how to select, install, and care for them to ensure a durable roof. It covers material options, coatings, and best practices to help builders and homeowners achieve reliable results with coil roofing nails.
What Are Coil Roofing Nails?
Coil roofing nails are small, wire nails formed in continuous spirals or coils that feed into a nailer gun. The coil design allows rapid, repeated firing with consistent spacing, making installation faster than traditional hand-nailed roofing. The heads are typically larger and flat, designed to hold down roofing materials securely. For asphalt shingles and many other roof coverings, coil roofing nails provide the balance of grip, corrosion resistance, and ease of use that keeps crews efficient on the job site.
Why Choose 1-1/2 Inch Nails
The 1-1/2 inch length is a versatile staple for many roofing applications. It offers enough shank length to penetrate through multiple shingle layers and into the roof deck while avoiding excessive protrusion. This size is commonly used for standard asphalt shingles and many composite roofing systems, providing reliable pull-out resistance in typical residential sheathing. In areas with higher wind uplift or thicker shingles, installers may opt for longer nails, but 1-1/2 inch is a standard, widely compatible choice.
Materials And Coatings
Coil roofing nails are available in several materials and coatings to suit different environments and roofing materials.
- Galvanized Steel: The most common option, offering good corrosion resistance and affordability for general residential use.
- Hot-Dip Galvanized: More robust corrosion protection, suitable for wet climates or coastal regions.
- Stainless Steel: Excellent durability and corrosion resistance, ideal for high-salt environments or long-lasting projects, though more expensive.
- Coatings (e.g., ceramic, epoxy): Additional protection against corrosion and better performance in extreme weather or for specific roofing materials.
Side note: The coating and material choice should align with local building codes and the roof’s exposure. For example, coastal zones may require stainless steel or heavy galvanization, while inland residential projects may be perfectly served by standard galvanized nails.
Sizes, Head Styles, And Use Cases
Beyond the 1-1/2 inch length, nail diameters and head designs influence performance.
- Diameter: Typical diameters range from #12 to #14; larger diameters increase grip but require compatible nailers and decking penetration.
- Head Style: Wide, flat heads help prevent pull-through on soft materials and provide greater surface contact with shingles.
- Shingle Type: Asphalt shingles, composition shingles, and wooden shakes often rely on coil nails with lengths between 1 inch and 1-3/4 inches for optimal set.
The 1-1/2 inch size is especially common for standard asphalt shingle installation on rooftops with typical 15/32 inch or 3/8 inch plywood or OSB decking, ensuring adequate hold without penetrating into attic spaces or roofing gaps. For cedar or heavier shingles, some projects may require longer nails or different fastener systems.
Installation Tips
Proper technique ensures that coil roofing nails perform as intended and maintain roof integrity over time.
- Use a Compatible Nail Gun: Verify the nailer is designed for 1-1/2 inch coil nails and that the magazine width matches the coil’s spacing.
- Pre-Set Depth: Adjust the nailer depth so nails fully penetrate through the shingle and into the deck without overdriving.
- Angle And Pattern: Typical patterns use a zigzag or manufacturer-recommended spacing along the shingles’ tabs to resist wind uplift.
- Do Not Over-Nail: Avoid driving nails too close to edges or too many nails in a small area, which can damage shingles.
- Inspect Post-Drive: Check for countersunk heads or loose nails, ensuring each nail has set correctly and sits flush or slightly below shingle surface.
Compatibility And Fastener Systems
Compatibility is crucial for performance and warranty adherence.
- Roof Deck: Ensure the nails can reach the sheathing; 1-1/2 inch nails typically penetrate through the shingle and into the deck for secure hold.
- Shingle Type: Confirm the nail size suits the specific roofing material; some shakes or thicker shingles may require different lengths or nail counts.
- Nail Gun Brand: Many manufacturers publish compatibility matrices; using a certified combination helps prevent malfunctions.
- Weather And Maintenance: In humid or salty environments, stainless steel or hot-dip galvanized nails may extend roof life.
Storage And Handling
Proper storage preserves nail integrity and performance.
- Keep Dry: Store in a dry environment to prevent rust on galvanized or steel nails.
- Avoid Contamination: Keep nails free from oil, dust, and solvents that may degrade coatings.
- Check For Bent Nails: Inspect coils for bent or damaged nails before loading; damaged nails can jam the gun or result in improper seating.
- Temperature Control: Use nails within recommended temperature ranges to maintain coating integrity and drive consistency.
Common Mistakes And How To Avoid Them
Awareness of typical errors helps prevent costly rework.
- Wrong Length: Using nails that are too short or too long can compromise hold or cause deck damage. Always verify the required length for the project.
- Incompatible Coatings: Selecting a coating unsuitable for the environment can lead to corrosion and failure over time.
- Over-Driving: Overdriven nails may split shingles or damage decking; set depth correctly and test on a sample area first.
- Inadequate Pattern: Skipping a wind-resistance pattern can reduce roof longevity in high-wind regions.
Environmental And Performance Considerations
Environmental conditions influence the choice of coil roofing nails.
- Wind Uplift: In high-wind zones, precise nail placement and adequate penetration are essential for preventing shingles from loosening.
- Moisture And Corrosion: Choose coatings and materials appropriate for local humidity, rain, and salt exposure.
- Code Requirements: Local building codes may specify allowable materials, coatings, and installation practices for roofing nails.
Conclusion
Coil roofing nails in the 1-1/2 inch size provide a practical, widely supported option for efficient roof installation. By selecting the right material and coating, using compatible nail guns, and following proper installation and storage practices, builders can achieve durable, weather-resistant roofs. Consider climate, roof material, and code requirements when choosing between galvanized, hot-dip galvanized, stainless, or specialty coatings to ensure long-term performance.