Summit Roofing Blog

Wind Ratings Explained: How Strong Is Your Roof?

Written by Summit Roofing | Sep 25, 2025 12:00:00 PM

Living on the North Carolina coast means preparing your home for seasonal high winds, tropical storms, and even hurricanes. Homeowners in Brunswick, New Hanover, and Pender counties know the damage strong winds can cause to roofs. 

But not everyone realizes their roof has a wind rating, or a measure of how much force it can withstand before shingles lift, seams fail, or panels peel away.

Understanding your roof’s wind rating is crucial in Wilmington’s coastal climate. It helps you make informed choices about roof replacement, upgrades, and ongoing maintenance.

Why Wind Ratings Matter in Coastal North Carolina

When a storm rolls in, your roof is the first line of defense. If it isn’t built to handle the winds common along the Cape Fear coast, damage can occur quickly.

  • Hurricane season: Wind gusts regularly exceed 70 mph during tropical storms and can reach 100+ mph in hurricanes.
  • Coastal exposure: Salt air and humidity weaken materials, making them more vulnerable to wind uplift.
  • Local building codes: In high-risk coastal zones, compliance with specific wind requirements isn’t optional—it’s the law.

Homeowners who understand their roof’s rating can better plan for upgrades that increase safety and reduce long-term repair costs.

How Roof Wind Ratings Are Determined

Wind ratings are set through a mix of laboratory testing and real-world data. Independent organizations like ASTM International and Underwriters Laboratories (UL) test roofing products under simulated wind conditions to establish maximum performance levels.

Key factors that influence a roof’s rating include:

  • Material type: Asphalt shingles, metal panels, and commercial membranes all perform differently.
  • Installation quality: Even the best shingles won’t meet their rating if improperly nailed or fastened.
  • Roof pitch and design: Steeper slopes shed wind more effectively than low-pitched or flat systems.
  • Fastening systems: Enhanced nailing patterns, clips, and adhesives significantly increase wind resistance.

For a deeper look at how materials are tested for high-wind environments, NumberAnalytics explains building codes and testing standards for wind.

We ensure every roof we install meets or exceeds local requirements. You can learn how our replacement options are designed for coastal North Carolina’s toughest weather.

Common Wind Rating Categories

Different roofing materials carry very different performance levels:

  • Standard asphalt shingles: Usually rated for 60–90 mph winds.
  • High-wind shingles: When installed with enhanced fastening, ratings can reach up to 130 mph.
  • Metal roofing systems: Many are rated to withstand winds over 140 mph.
  • Commercial flat roof membranes: Performance varies widely based on membrane type, attachment, and ballast.

Our commercial roofing services in Wilmington include options engineered specifically for high-wind resistance.

For homeowners comparing asphalt products, Owens Corning provides an in-depth look at shingles and wind resistance.

Signs Your Roof May Not Meet Current Standards

Even if your roof has survived past storms, that doesn’t mean it meets today’s codes or performance expectations. Warning signs include:

  • Shingles lifting or curling at the edges
  • Loose or missing flashing around chimneys, vents, or valleys
  • Visible gaps where wind can penetrate beneath materials
  • Roof age of 15–20 years or more, especially if installed before updated codes took effect

If you’re concerned, talk to Summit Roofing about upgrading to a roof designed for coastal storm protection.

Upgrading for Better Wind Performance

Improving your roof’s resistance doesn’t always mean a full replacement. In many cases, upgrades during repairs or maintenance can make a big difference.

  • Choose higher-rated materials: Opt for shingles, metal, or membranes certified for higher wind speeds.
  • Ensure proper installation: Nailing patterns, underlayment, and fastening systems must follow manufacturer and code standards.
  • Schedule regular inspections: After major storms, inspections can identify small vulnerabilities before they turn into costly repairs.

With Wilmington’s frequent storm activity, proactive upgrades are one of the best investments you can make.

Local Building Codes and Wind Zone Requirements

In North Carolina, wind zones are mapped by county and distance from the coast. Wilmington and nearby towns fall under stricter coastal requirements, which means your roofing contractor must be familiar with these codes.

Failing to meet standards can result in failed inspections, voided warranties, and greater storm damage risk.

Working with a local contractor ensures compliance and gives you peace of mind. Learn more about us and why Summit Roofing is trusted as a top roofing contractor in Wilmington.

Know Your Roof’s Limits Before the Storm

Roof wind ratings in Wilmington, NC, aren’t just numbers on a chart. They represent how well your home or business is protected when the next storm arrives. Investing in the right materials and installation methods now can prevent thousands of dollars in damage later.

If you’re not sure your current roof meets today’s wind requirements, contact Summit Roofing for an inspection. We’ll evaluate your system, explain its wind performance, and recommend upgrades that keep your home or business safe.