Metal roofing is one of the most durable, energy-efficient, and low-maintenance options available to homeowners today. But “low-maintenance” doesn’t mean no maintenance — and if you’re aiming to get the full 40 to 70+ years from your metal roof, routine care is essential.

At Nurnberg Roofing, we install metal roofs built to last — and we know exactly what it takes to keep them that way. Below, we share a detailed, professional guide on how to properly maintain a metal roof for maximum lifespan and long-term performance.

Understanding the Lifespan of a Metal Roof

A high-quality metal roof, when installed correctly and maintained consistently, can last anywhere from 40 to over 70 years. In fact:

• Steel and aluminum roofs typically last 40–50 years.
• Copper and zinc roofs can last well over 100 years.

But your roof’s longevity doesn’t just depend on the material — factors like installation quality, climate, and ongoing care play just as large a role. Poor maintenance can cut decades off a roof’s life. The good news? Most issues are preventable.

Why Metal Roof Maintenance Matters

Even though metal roofs resist fire, mildew, insects, and rot, they are still vulnerable to long-term wear if neglected.

Here’s why metal roof maintenance is worth your attention:

• Prevents corrosion and rust
• Maintains waterproof sealing
• Preserves the paint system and finish
• Protects your warranty coverage
• Avoids costly repairs or premature replacement

A few hours a year can add years — even decades — to your roof’s life.

Routine Maintenance Checklist for Metal Roofs

To make your metal roof maintenance simple and effective, follow this checklist:

Visual Inspections (Twice a Year or After Severe Weather)

Look for:

• Loose or missing fasteners
• Dents or panel damage
• Rust spots or discoloration
• Failing sealants or exposed screws
• Flashing separation around chimneys or vents

If you’re unsure what you’re seeing, call a professional. Catching early signs of failure is key to preventing major problems.

Cleaning the Roof Surface

Debris like leaves, branches, and dirt can trap moisture and lead to corrosion — especially in standing seams or low-slope areas.

• Use a soft brush or cloth mop
• Rinse with a low-pressure garden hose
• Avoid abrasive tools or harsh chemicals
• Clean bird droppings, sap, or other contaminants quickly to prevent surface damage

Clear Gutters & Drainage Systems

Clogged gutters can back water up under panels and cause rust at seams or edges.

• Clean gutters seasonally (especially in fall and spring)
• Check for gutter alignment and secure attachments
• Make sure downspouts are directing water away from the home

Check Fasteners and Screws

Over time, screws may become loose due to thermal expansion and contraction.

• Tighten any visibly loose fasteners
• Look for missing washers or signs of movement
• Never overtighten — this can damage panels
• Consider professional retrofitting if needed

Inspect Flashings and Sealants

Sealants degrade from UV exposure, freezing temperatures, and age.

• Examine caulking around vents, skylights, and joints
• Replace cracked or deteriorating sealant with roofing-grade silicone or butyl
• Check flashing for lifting or corrosion

Preventing Corrosion and Rust

Metal roofing is often coated to resist rust, but damage to that coating can open the door to corrosion.

Tips to Prevent Rust

• Immediately treat scratches or exposed areas with touch-up paint
• Avoid placing dissimilar metals in contact (e.g., copper and steel can corrode each other)
• Clean standing water promptly — especially in valleys or flat areas
• Ensure fasteners are corrosion-resistant and correctly installed

If you notice rust, lightly sand the area, apply a metal primer, and repaint with matching coating.

Trim Trees & Remove Overhanging Branches

Tree limbs can scratch the surface, drop leaves, and even cause dents during storms.

• Trim trees back at least 6 feet from the roofline
• Clear off fallen branches or debris after heavy winds
• Maintain landscaping to reduce risk of impact or abrasion

This also helps keep animals (like squirrels or raccoons) from accessing your roof.

Snow & Ice Management (For Cold Climates)

Metal roofs are excellent for snow shedding, but unmanaged accumulation can lead to issues.

• Remove excessive snow with a roof rake designed for metal roofs
• Install snow guards to prevent dangerous roof avalanches
• Consider heat cables for gutters in ice-prone zones
• Ensure attic is properly insulated to reduce ice dam formation

Don’t use metal tools to remove snow — they can damage the surface coating.

Repainting and Recoating

Over time, metal roof coatings wear down due to sun exposure and weathering.

• Recoat your roof every 10–15 years, depending on manufacturer’s guidelines
• Use elastomeric or reflective coatings to improve energy efficiency
• Touch up areas with chipped paint or exposed metal regularly

Repainting not only improves appearance — it adds another layer of protection against moisture and rust.

Professional Inspections and Maintenance

While DIY maintenance is valuable, nothing replaces a trained eye.

Schedule a professional inspection at least once every 2 years, or annually in severe weather zones. A roofing expert will:

• Use thermal imaging or drones to spot hidden issues
• Check fastener systems and panel integrity
• Test sealants, flashing, and underlayment performance
• Provide recommendations for restoration, coating, or repair

If you’re in need of expert care, our team at Nurnberg Roofing offers comprehensive Metal Roofing Service — from professional installation to long-term maintenance solutions.

Common Metal Roof Maintenance Mistakes to Avoid

Even well-intentioned homeowners can make costly errors. Avoid the following:

• Walking improperly on the roof (can dent panels or break seams)
• Using wire brushes or pressure washers
• Applying incompatible coatings or sealants
• Ignoring small leaks or cosmetic issues
• Skipping inspections after storms

When in doubt — don’t guess. Call a professional.

The Long-Term ROI of Proper Metal Roof Maintenance

Keeping your metal roof maintained doesn’t just protect your home — it’s a smart investment.

Benefits include:

• Extended roof life (up to 2x longer)
• Fewer repairs and emergencies
• Consistent curb appeal
• Better home resale value
• Improved insulation and energy savings
• Reduced insurance risks

A well-maintained metal roof is not just a shield — it’s a long-term asset.

Conclusion

A metal roof is one of the most dependable and long-lasting systems available for homeowners — but its lifespan is directly tied to how well it’s maintained.

By following a consistent maintenance routine and working with professionals when needed, you can ensure your roof continues performing for decades.

Whether you’re dealing with minor wear or looking for a full-service maintenance partner, Nurnberg Roofing is here to help. We don’t just install metal roofs — we protect them for life.