Metal Roof Maintenance: Calgary Edition

As someone who has called Calgary home for most of my life, I understand how our unique climate puts every part of a home to the test—especially the roof.

I started Cowboys Roofing & Exterior with a mission: to help Calgary homeowners protect what matters most, using quality materials and good old-fashioned workmanship. Over the years, I’ve seen just how reliable and energy-efficient metal roofs can be, but only when they’re properly maintained. That’s why I wanted to write this blog—to help you get the most out of your investment.

Whether you’re a new homeowner with a freshly installed steel or aluminum roof, or your metal panels have weathered a few Calgary winters, this guide will walk you through everything you need to know to keep your roof in peak condition for decades.

Let’s dive in.

Why Metal Roofs Are a Smart Choice in Calgary

Calgary’s climate throws everything at our homes: blistering summer sun, sub-zero winter temps, heavy snowfall, ice dams, hailstorms, and high winds. That’s why metal roofing has become such a popular option across the city and surrounding areas like

Airdrie, Okotoks, and Cochrane.

Metal roofs offer:

- Longevity (40–70 years when properly maintained)

- Fire resistance

- Excellent snow-shedding capabilities

- Wind and hail resilience

- Energy efficiency (reflective coatings reduce cooling costs)

But even though metal roofs are built to last, they aren’t completely maintenance-free. Letting small issues go unchecked can reduce their lifespan and cost you more in the long run.

The Essential Metal Roof Maintenance Checklist (Calgary-Specific)

1. Inspect After Major Weather Events

Living in Alberta means sudden weather shifts are the norm. After a heavy hailstorm, windstorm, or blizzard, do a visual inspection (from the ground or with binoculars—no need to get on the roof unless you're a pro). Look for:

- Dented panels or flashing

- Missing fasteners

- Displaced snow guards

- Scratches or exposed metal (which can lead to rust)

- Signs of ice dam formation near eaves or valleys

Tip: If you're unsure what to look for, book a professional inspection. Cowboys Roofing & Exterior offers seasonal inspection services throughout Calgary.

2. Keep Gutters and Downspouts Clean

Clogged gutters are a leading cause of water damage—especially when combined with Calgary’s freeze-thaw cycles. Debris like pine needles, leaves, and roof granules can block drainage, causing ice dams, backup, or rust at the seams.

✅ Clean out your gutters twice a year—once in spring and again in the fall.

✅ Check for leaks at seams and joints.

✅ Ensure downspouts direct water away from your foundation.

3. Remove Debris from the Roof Surface

Tree branches, twigs, and other windblown debris can trap moisture and scratch the metal’s protective coating, leading to corrosion over time.

If safe, use a soft broom or leaf blower (never a metal rake) to remove debris. Focus on:

- Valleys (where debris tends to collect)

- Behind chimneys or vent stacks

- Around skylights and solar panels

Pro Tip: If you’re in a heavily treed area like Bearspaw or Springbank, consider more frequent cleaning—especially during fall and after windstorms.

4. Check and Tighten Fasteners

Most Calgary homeowners don’t realize that extreme temperature swings cause metal to expand and contract, which can gradually loosen screws and fasteners.

At least once every 2–3 years, hire a roofing technician to:

- Re-tighten exposed fasteners

- Replace any missing or rusted screws

- Check for rubber washer degradation

This is especially important for older exposed-fastener systems or corrugated roofs.

5. Inspect and Maintain Sealants & Flashings

The sealants around vents, skylights, and flashing points can break down over time due to UV exposure and temperature stress—both of which are frequent here in Calgary.

Look for:

- Cracks or shrinkage in caulking

- Lifting or gapping flashing

- Leaks inside the attic near flashing points

When in doubt, reapply sealant with a roofing-grade product or contact a pro to replace worn materials.

6. Combat Corrosion the Right Way

Most metal roofs are coated to resist rust, but scratches, aging, or improperly sealed penetrations can lead to corrosion. If you spot rust:

- Clean the affected area with a non-abrasive cleaner

- Lightly sand to remove oxidation

- Apply a roof-safe metal primer and touch-up paint matching your roof’s coating

Avoid household paints—they don’t adhere well and won’t protect against Calgary’s harsh climate.

7. Trim Overhanging Trees

Not only do trees drop debris, but during storms they can scratch, dent, or even pierce a metal roof. Keep limbs at least two metres away from the roofline.

Plus, trimming trees helps reduce the chance of animals (like squirrels or raccoons) accessing your roof and creating damage near vents or eaves.

Winter-Specific Maintenance for Metal Roofs in Calgary

1. Monitor Snow Loads

Metal roofs typically shed snow efficiently, but sometimes the snow builds up in valleys, around chimneys, or along north-facing slopes.

Excess weight can stress the roofing structure—especially in older homes or homes with lower pitches.

Consider:

- Installing snow guards or snow rails to manage sliding snow

- Using a roof rake with a telescopic handle to clear snow from key areas (never stand on the roof yourself)

- Watching for signs of sagging, creaking, or leaking

2. Prevent Ice Dams

Calgary’s freeze-thaw cycles are notorious for creating ice dams. Though metal roofs are less prone to ice damming than shingles, it can still occur—especially if:

- Your attic is poorly insulated or ventilated

- Gutters are clogged

- Roof valleys collect excess meltwater

Combat this with:

- Proper attic ventilation

- Heated cables in problem areas

- Professional insulation upgrades if necessary

What About Painted or Coated Metal Roofs?

Many Calgary homes have painted steel or standing seam metal roofs with protective coatings like Kynar 500 or SMP (Silicone-Modified Polyester). These coatings:

- Improve UV resistance

- Prevent chalking and fading

- Add visual appeal

To maintain their look:

- Wash your metal roof every 1–2 years using mild soap and a soft brush

- Avoid harsh chemicals or pressure washing

- Spot-treat bird droppings, tree sap, and airborne pollutants quickly

Common Mistakes to Avoid

When it comes to metal roof maintenance in Calgary, what you don’t do can be just as important as what you do.

🚫 Don’t walk on your roof unless absolutely necessary – Metal can be slippery, and missteps can cause dents or scuffs. Always call a professional if inspection or repairs are needed.

🚫 Don’t use abrasive tools or wire brushes – These damage the finish and reduce corrosion resistance.

🚫 Don’t ignore minor leaks – Even small drips can lead to structural rot, mold, and insulation damage if left unchecked.

When to Call a Professional

While basic maintenance like gutter cleaning and debris removal can be done DIY-style, other tasks are best left to the pros—especially in Calgary where seasonal safety hazards like icy roofs and strong winds can make roof work risky.

Consider hiring Cowboys Roofing & Exterior for:

- Annual inspections

- Post-storm assessments

- Fastener retightening and flashing replacement

- Rust treatment and roof painting

- Snow guard installation

- Full-service metal roof repairs

With over 15 years of experience working in Calgary’s harshest weather, we know how to protect your home—and your warranty—while extending your roof’s life.

Final Thoughts: Calgary’s Metal Roof Experts Are Just a Call Away

Metal roofs are a smart investment in Calgary—offering durability, energy savings, and peace of mind. But like any high-performance system, they need the right care. A little maintenance now prevents major issues later, and we’re here to help every step of the way.

If you’d like a professional inspection, repair, or just a bit of friendly advice on keeping your metal roof in tip-top shape, give us a call