Every little thing counts when it comes to roof installation. A seemingly small but crucial factor is the size of the nails that hold your shingles in place. Selecting the proper size roofing nails guarantees a stable, weather-tight roof that will shield your house for many years to come. The incorrect nails can cause blow-offs, leaks, and expensive future repairs.
To help you out, in this blog post, we will take a look at the elements that affect nail size and answer the simple question: What size roofing nails should be used for shingles?
Materials Used in Roofing Nails
Before getting started, another factor to consider before choosing roofing nails is the material. Here are some common options
1. Galvanized Steel
Coated with zinc, these nails resist rust and corrosion, making them a popular choice for many roofing projects. They work well in moderate weather but may not be as durable in extreme conditions. While cost-effective, they generally have a shorter lifespan compared to other materials.
2. Stainless Steel
Offering excellent corrosion resistance, these nails are ideal for high humidity or coastal environments. They do not rust, ensuring long-term reliability even in harsh weather. Though more expensive, they are a good investment for durability, especially with slate or tile roofs.
3. Aluminum
Lightweight and corrosion-resistant, aluminum nails are suitable for metal roofs and fiberglass shingles. They handle stress less well but may deteriorate faster in coastal areas with salt exposure. They provide a balance between weight and weather resistance but may not be suitable for all conditions.
4. Copper
Highly resistant to corrosion, copper nails are used for specific applications like slate roofs or copper components. They blend well with copper accents but are more costly and can develop a green patina over time. They offer strong durability but may not be the best choice for every roofing project.
Types Of Nails Used For A Shingle Roof
1. Smooth Shank Nails
Common in residential roofing, smooth shank nails are designed for easy penetration into softwood roof decks and asphalt shingles. They are cost-effective but may not hold as well in high-wind areas due to their smooth surface.
2. Ring Shank Nails
Featuring rings along the shank, these nails offer increased resistance against pull-out forces. They are ideal for roofs in windy regions, as their design enhances holding power compared to smooth shank nails.
3. Square Cap Nails
Equipped with a flat head design, square cap nails are suited for securing thin materials like metal sheets or cedar shakes. Their large surface area helps distribute the load, minimizing the risk of tearing through the roofing material.
Also Read: Nail Pops On Roof: Causes & Solutions
Recommended Nail Sizes for Different Shingles
Now on to the main section of our blog post: how to choose the right size nail for your roofing project. Different roof shingles require different nail sizes, materials, and types.
| Type of Shingle | Recommended Nail Length | Notes |
| Asphalt Shingles | 1 inch to 1 1/4 inch | Use ring shank or screw shank nails for better-holding power in windy areas. |
| Wood Shingles/Shakes | 1 1/4 inch to 2 inches | Longer nails are preferred for thicker shakes; ensure proper placement to avoid splitting. |
| Slate Shingles | 1 1/2 inch to 2 inches | Stainless steel nails are recommended to prevent corrosion ensure nails penetrate the roof deck adequately. |
| Metal Shingles | 1 1/4 inch to 1 1/2 inch | Use screws or cap nails designed for metal shingles to ensure a secure fit and prevent leaks. |
| Composite Shingles | 1 1/4 inch to 1 3/4 inch | Follow manufacturer guidelines for nail placement and type to maintain warranty coverage. |
| Tiles | 1 1/2 inch to 2 1/2 inches | Use stainless steel or copper nails to prevent rust; ensure proper nailing pattern to secure tiles effectively. |
Nail Gauge and Diameter
Nail gauge indicates thickness, with lower numbers being thicker. Understanding nail gauge helps ensure a strong and durable roof.
Importance of Nail Gauge
- Strength and Holding Power: Thicker nails (lower gauge) provide better holding power, especially in high-wind areas.
- Durability: Thicker nails are less likely to bend or break, ensuring better structural integrity.
- Building Code Compliance: Many codes require at least 12-gauge nails. Using the correct gauge is essential for compliance and warranty coverage.
| Gauge | Diameter (in inches) | Strength | Recommended Use |
12 | 0.109 | Minimum allowed | Standard for most asphalt and wood shingles; good for general use. |
| 11 | 0.12 | More durable | Recommended for high-wind areas; provides better holding power. |
10 | 0.135 | Most durable | Ideal for heavy shingles, tile roofs, and severe weather conditions. |
Factors to Consider When Choosing Nail Size
1. Shingle Thickness
The thickness of the shingles affects the nail length needed. Thicker shingles require longer nails for proper anchoring, while thinner shingles need shorter nails. Matching nail length to shingle thickness is crucial to avoid issues like nail pull-through or shingle blow-off.
2. Roof Slope
The roof’s slope influences nail size selection. Steeper roofs may require nails to be driven in more securely to handle wind and weather pressure. For very steep slopes, longer nails or additional fasteners might be necessary to keep the shingles in place.
3. Climate Conditions
Climate affects the choice of roofing nails. In areas with heavy rainfall or high humidity, nails with corrosion resistance are vital to prevent rust. In extreme temperatures, nails that handle thermal expansion and contraction help maintain the roof’s integrity.
4. Building Codes
Local building codes may specify requirements for nail gauge and length. Most codes require a minimum nail gauge of 12, but some areas might have stricter standards. Always check local codes to ensure compliance.
Benefits of Using the Right Nail Size
1. Improved Shingle Hold
Correct nail size ensures shingles are securely attached to the roof deck, reducing risks of wind uplift and water infiltration. This helps the roof perform well and maintain its appearance over time.
2. Reduced Risk of Damage
Using the right nail size prevents damage to both shingles and the roof deck. Nails that are too short may not hold securely, while those that are too long could penetrate through or damage the shingles. The correct size balances protection for both shingles and the roof deck.
Conclusion
For your roof to last a long time and function properly, choosing the correct size of roof nails is essential. By being aware of the numerous kinds of nails and typical sizes recommended for various shingle types, you can make a decision that will ensure a safe and long-lasting roofing system.
If you need help choosing the right nails for your roofing project or require expert assistance with installation, look no further than All Around Roofing, Siding & Gutters. Our skilled team can offer you professional roofing services and ensure your roof is installed with the utmost quality and precision. Contact us today at (937) 902-2839 for reliable roofing services tailored.
