Metal roofs are known for their durability, energy efficiency, and long lifespan—but they are not completely immune to damage. One of the most common threats homeowners face is corrosion. If you live in the Winston-Salem, Greensboro, or High Point area, understanding what causes metal roof corrosion and how to prevent it can help you protect your investment for decades to come.
In this article, we’ll explore why metal roofs corrode, what you can do to prevent corrosion, the pros and cons of metal roofing, and why it’s important to have a professional like Good Roofs and Tree Service inspect your metal roof.
Why Do Metal Roofs Corrode?
Corrosion occurs when metal reacts with its environment, leading to oxidation (commonly known as rust). While most modern metal roofs are coated or treated to resist corrosion, several factors can still cause problems over time.
1. Moisture and Standing Water
Prolonged exposure to moisture is one of the leading causes of metal roof corrosion. Standing water from clogged gutters, poor drainage, or low-slope areas allows metal to stay wet for extended periods, accelerating oxidation.
2. Salt Exposure
Although the Piedmont Triad is not coastal, airborne salt can still travel inland or come from de-icing products and industrial pollution. Salt acts as a catalyst for corrosion, breaking down protective coatings faster.
3. Acid Rain and Environmental Pollutants
Areas like Winston-Salem, Greensboro, and High Point experience air pollution that can contribute to acid rain. Acidic moisture slowly eats away at protective finishes, exposing raw metal underneath.
4. Dissimilar Metals
When two different metals come into contact—such as steel fasteners used on an aluminum roof—galvanic corrosion can occur. This chemical reaction causes one metal to corrode faster than normal.
5. Scratches and Coating Damage
Metal roofing panels are typically protected by galvanized, Galvalume, or painted coatings. Scratches from falling branches, foot traffic, or improper installation expose bare metal, creating an entry point for rust.
6. Organic Debris
Leaves, pine needles, and tree debris can trap moisture against the roof surface. Over time, this damp environment promotes corrosion, especially in shaded areas where drying is slow.
What Can You Do to Prevent Metal Roofs from Corroding?
The good news is that corrosion is largely preventable with proper care and regular inspections.
1. Schedule Regular Roof Inspections
Routine inspections help catch early signs of corrosion before they turn into costly repairs. A professional roofer knows where to look and what warning signs to address.
2. Keep the Roof Clean
Remove debris like leaves, branches, and dirt buildup. Keeping valleys and drainage points clear prevents standing water.
3. Maintain Gutters and Downspouts
Clogged gutters cause water to back up onto the roof. Proper drainage is essential for preventing moisture-related corrosion.
4. Repair Scratches and Exposed Metal
Small scratches should be sealed with manufacturer-approved paint or coatings to restore protection.
5. Use Proper Materials
Ensure fasteners, flashing, and accessories are compatible with your metal roof. Mixing metals is a common but avoidable mistake.
6. Trim Overhanging Trees
Tree limbs not only scratch metal panels but also drop debris that traps moisture. Trimming trees reduces physical damage and moisture retention.
What Are the Pros and Cons of Metal Roofs?
Metal roofing continues to grow in popularity across North Carolina—and for good reason. However, it’s important to weigh both the advantages and disadvantages.
Pros of Metal Roofs
• Longevity: Metal roofs can last 40–70 years with proper maintenance.
• Durability: Resistant to high winds, hail, and fire.
• Energy Efficiency: Reflects solar heat, reducing cooling costs in hot summers.
• Low Maintenance: Requires less upkeep than asphalt shingles.
• Eco-Friendly: Often made from recycled materials and fully recyclable.
Cons of Metal Roofs
• Higher Initial Cost: Upfront installation costs are higher than traditional roofing materials.
• Potential for Noise: Rain or hail can be louder without proper insulation.
• Expansion and Contraction: Temperature changes can cause panels to shift if not installed correctly.
• Corrosion Risk: Without proper maintenance, coatings can fail over time.
Understanding these pros and cons helps homeowners make informed decisions and maintain their roofs properly.
Why Is It Important to Have a Professional Like Good Roofs and Tree Service Inspect Your Metal Roof in the Winston-Salem, Greensboro, High Point Area?
Metal roofs are a long-term investment, and professional inspections are critical to protecting that investment—especially in the Piedmont Triad’s changing climate.
Local Expertise Matters
Good Roofs and Tree Service understands the specific environmental challenges faced by homeowners in Winston-Salem, Greensboro, and High Point. From heavy summer storms to falling tree debris, local conditions play a major role in roof wear and corrosion.
Early Detection Saves Money
Professional inspections can identify:
• Early rust spots
• Failing fasteners
• Coating deterioration
• Drainage issues
• Damage from trees or storms
Catching these issues early prevents expensive repairs or premature roof replacement.
Safety and Accuracy
Walking on a metal roof can be dangerous and may cause damage if done incorrectly. Trained professionals have the right equipment and experience to inspect safely without harming your roof.
Comprehensive Roofing and Tree Services
Unlike many roofing companies, Good Roofs and Tree Service also addresses tree-related risks—one of the leading causes of metal roof damage. This integrated approach helps prevent scratches, debris buildup, and moisture retention that lead to corrosion.
Schedule Your Metal Roof Inspection Today
Corrosion doesn’t happen overnight—but once it starts, it can spread quickly and silently. Regular inspections and preventative maintenance are the best ways to protect your metal roof and extend its lifespan.
If you’re a homeowner in Winston-Salem, Greensboro, or High Point, don’t wait until rust becomes a major problem. Visit the Good Roofs and Tree Service website today and schedule a professional metal roof inspection. Their experienced team will help ensure your roof stays strong, corrosion-free, and built to last for years to come.