What Size Roofing Nails for Shingles? A Washington Roofer’s Guide
When it comes to building a durable and weather-resistant roof in Washington, every component plays a crucial role. One of the most overlooked but essential factors in shingle installation is knowing what size roofing nails for shingles to use. Whether you’re a professional contractor or a homeowner planning to replace a roof, knowing what size roofing nails for shingles is not just technical trivia—it’s key to preventing premature failures, ensuring code compliance, and optimizing long-term performance.
Let’s break down everything Washington property owners and roofing professionals need to know about what size roofing nails for shingles to use on their projects.
Understanding the Importance of Correct Roofing Nail Size
Why roofing nail size matters for shingle integrity
The right roofing nail size ensures that each shingle is securely fastened to the roof deck. Undersized roof nails may not penetrate deeply enough, leading to loose or dislodged shingles during windstorms or heavy rains. Oversized nails, on the other hand, can damage the shingles or penetrate too far, reducing hold and causing long-term issues. That’s why determining what size roofing nails for shingles is appropriate becomes vital.
Building codes and manufacturer guidelines
In Washington, both the International Residential Code (IRC) and shingle manufacturers specify minimum requirements for roofing nails. These codes are especially important in areas like Seattle and Tacoma, where high winds and heavy rains are common.
Risks of using incorrect nail sizes
Leaks from loose shingles
Uplift damage in storm-prone regions
Voided warranties from non-compliant installations
Failed home inspections or resale challenges
Standard Roofing Nail Sizes for Shingles
What is the typical length of roofing nails for asphalt shingles?
For standard asphalt roofing shingles, most manufacturers recommend nails that are at least 1 ¼ inches long. This length provides sufficient penetration into the sheathing, especially if underlayment layers or felt are present. When deciding what size roofing nails for shingles to buy, this measurement is a good place to start.
Minimum nail length requirements (according to IBC and IRC)
Building codes require roofing nails to penetrate:
At least ¾ inch into the roof deck, or
Through the thickness of the deck, whichever is less
This usually means:
1-inch nails for thin sheathing
1 ¼ to 1 ½-inch nails for thicker materials
Shank diameter and head size: what to look for
Shank diameter: Usually around 11 or 12 gauge
Head diameter: Around ⅜ inch, large enough to hold the shingle in place without tearing
Use of ring shank nails for added grip in high-wind areas
Galvanized vs. stainless steel vs. aluminum nails
Galvanized steel nails are standard for their rust resistance
Stainless steel is ideal for coastal regions like Bellingham or Everett
Aluminum nails are lighter but not recommended for asphalt due to corrosion risk
Cap nails are better suited for securing underlayment or synthetic roofing materials
Nail Size by Roof Deck Material and Shingle Type
Nail length for 3-tab vs. architectural shingles
3-tab roofing shingles: 1 ¼-inch nails typically suffice
Architectural shingles: Often require 1 ½-inch or longer nails due to added thickness
How deck thickness (OSB or plywood) affects nail length
OSB (7/16 inch): 1 ¼-inch nails are standard
Plywood (5/8 or ¾ inch): Use 1 ½ to 1 ¾-inch nails to ensure proper anchoring
Special considerations for underlayments and double-layered shingles
If your roof includes a waterproof membrane or is a second layer over existing shingles, you may need 2-inch nails to accommodate the added depth. Always refer to manufacturer instructions when selecting what size roofing nails for shingles to use in these situations.
How Many Nails Per Shingle in Washington?
Local code requirements in Washington State
The minimum standard in Washington is typically:
4 nails per shingle, unless otherwise specified
6 nails per shingle in high-wind zones like the Columbia Basin
Manufacturer-specific nail pattern and count
Double nailing the sealant strip is often required for laminated shingles
Nail placements must hit designated areas, often called the nailing zone, to avoid tearing or slippage
Best practices for wind resistance and heavy rainfall areas
Use ring-shank nails for added grip
Apply six nails per shingle in Puget Sound or Southwest WA regions prone to storms
Follow staggered nail placement for added reinforcement
Nail Gun or Hand Hammer: Which Is Best for Installing Shingles?
Pros and cons of nail guns vs. hand nailing
Nail Gun:
Fast and efficient
Consistent driving depth
Requires careful pressure adjustment
Hand Nailing:
More control
Preferred for smaller or detailed jobs
Slower but precise
Nail gun pressure settings and depth control
Washington’s variable humidity can affect tool performance. Maintain 90–100 psi and adjust for:
Shingle thickness
Roof pitch
Deck density
Washington climate considerations when choosing tools
Moisture in the air can cause tool jamming or corrosion. Use lubricated and rust-resistant tools, especially in areas like Olympia or Bellevue where wet conditions prevail.
What Are the Signs of Improper Nailing on a Roof?
Shingles lifting or blowing off
This is the most obvious sign. It often occurs when:
Nails are too short
Nail count is too low
Improper placement misses critical nailing zones
Exposed or overdriven nails
Overdriven nails tear through shingles
Exposed heads rust over time and invite leaks
Roof leaks and water intrusion
If nails don’t penetrate properly, shingles can shift, allowing water beneath and causing rot or mold in attics.
Uneven or buckled shingles
Too much pressure or angled nails can cause buckling, leading to aesthetic and structural problems.
How Much Does Roofing Nail Installation Cost in Washington?
Average roofing project cost breakdown
Roofing costs in Washington typically range from $6,000 to $12,000 depending on the size, slope, and materials. Nail-related costs are a fraction but still impactful.
Roofing nails (bulk): $30–$60 per job
Labor for installation: Varies based on complexity and city
How nail type and quantity affect overall cost
Ring-shank or stainless steel nails cost more
Using 6 nails per shingle vs. 4 increases fastener count by 50%
Pricing variations in Seattle, Bellevue, and Tacoma
Expect higher labor and material costs in major metros like:
Seattle: Premium labor rates
Bellevue: Higher overhead due to market demand
Tacoma: Competitive pricing with large contractor presence
DIY or Hire a Professional? Roofing Nail Installation Tips
Tools and safety equipment you need
Hammer or nail gun
Roofing nails (galvanized)
Safety harness and gloves
Ladder and roof jacks
Step-by-step: How to properly nail shingles
Position shingle correctly
Drive nail straight through the nailing zone
Ensure nail penetrates deck at least ¾ inch
Space nails evenly and avoid overdriving
Common DIY mistakes to avoid
Using nails that are too short
Overdriving nails into shingles
Nailing too high or too low on the shingle
Skipping nails in high-wind zones
When to call in a professional roofer
If your roof has:
Complex slopes
Previous damage
Multiple layers
Or you’re unsure about code compliance
Then it’s best to hire a licensed Washington roofing contractor who understands exactly what size roofing nails for shingles are needed.
Why Choose Professional Roofing Services in Washington?
Warranty compliance and code adherence
Professional roofers know exactly what size roofing nails for shingles are required by code and warranty standards. This ensures long-term protection and peace of mind.
Avoiding long-term roof damage
Improperly driven or sized nails can lead to:
Shingle failure
Interior water damage
Costly re-roofing
Local expertise in wet-weather roof performance
Roofing in Washington means dealing with rain, snow, and wind. Trained professionals adapt nail size and placement to match these conditions, especially in places like Redmond, Kent, and Spokane.
Verified professionals through RCAW and other associations
Choosing an RCAW-affiliated contractor means:
Vetted credentials
Continuing education
Local knowledge and accountability
Serving Roofers and Homeowners Across Washington
At the Roofing Contractors Association of Washington (RCAW), we proudly support the state’s roofing professionals and homeowners with resources, guidance, and advocacy. Whether you’re nailing shingles in the rainy neighborhoods of Seattle, the windy ridges of Spokane, or coastal zones like Bellingham, we’re here to help you do it right.
Our guidance is trusted by contractors and property owners in Bellevue, Tacoma, Everett, Kent, Renton, Federal Way, Kirkland, Redmond, and beyond. RCAW is your partner in ensuring roofing quality across Washington.
Final Thoughts on Choosing the Right Size Roofing Nails for Shingles
Recap: Key specs to remember
Minimum nail length: 1 ¼ inches for asphalt shingles
Shank diameter: 11–12 gauge
Material: Galvanized or stainless steel
Nail count: 4–6 nails per shingle
Compliance, performance, and protection
Using the right roofing nails isn’t just a technical detail. It’s about:
Meeting local codes
Securing manufacturer warranties
Maximizing the life of your roof
When in doubt, consult a licensed roofer or your local building department
If you’re unsure about what size roofing nails for shingles are appropriate, don’t guess. Hire a trusted professional who understands Washington’s roofing standards inside and out.
FAQs About Roofing Nail Sizes in Washington
Can I use 1-inch nails for asphalt shingles?
Only if your decking is very thin. Otherwise, 1 ¼-inch or longer is recommended when deciding what size roofing nails for shingles are suitable.
What if my roof has a double-layer of shingles?
You’ll need nails at least 2 inches long to penetrate both layers and the sheathing.
Are coil nails better than hand-driven roofing nails?
Coil nails are faster and consistent when used with nail guns, especially for large jobs. Hand-driven nails offer more precision in tight or detailed areas.
How do I check if my roofer used the right nails?
You can ask for photos, material receipts, or schedule a roof inspection post-installation to verify what size roofing nails for shingles were used.
Contact Roofing Contractors Association of Washington
Choosing the right roofing contractor starts with knowing who you can trust. At the Roofing Contractors Association of Washington (RCAW), we help connect homeowners with licensed, knowledgeable, and vetted roofing professionals across the state.
Why Choose RCAW
We’re not a contractor—we’re an industry resource. Our mission is to improve roofing practices across Washington through advocacy, education, and partnership. Our members are trained, insured, and committed to delivering quality.
Our Services and Professionalism
From Spokane to Seattle, RCAW is the go-to source for:
Roofer certification and referrals
Industry education
Consumer awareness
Best practice roofing guides
Contact Info and Service Areas
To learn more about RCAW or to find a trusted roofing professional near you, visit our website or reach out directly. We serve all of Washington, including:
Seattle, Tacoma, Bellevue, Spokane, Everett, Kent, Renton, Federal Way, Kirkland, Redmond, Bellingham, and more.
Let’s raise the roof on roofing standards together. Call us or message on the website to connect with Roofing Contractors Association of WA.
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