The Best Roofing Materials for New Brunswick Winters

Picking a roofing material in New Brunswick isn't like picking one in Toronto or Halifax. We get a specific combination of heavy wet snow, gale-force coastal winds, fast freeze-thaw cycles, and long humid summers — and most national roofing guides ignore all of that.

This is a Moncton roofing contractor's breakdown of every material we actually install on Greater Moncton, Dieppe, Riverview, Shediac, and Fredericton homes — what each does well, where each fails, and what your house should probably be wearing.

What NB weather actually does to a roof

Four stressors do most of the damage in our region:

• Wet snow load. Coastal NB snow is heavier than prairie powder. A foot of wet March snow can add 15–25 lb per sq ft to a roof — engineering matters.
• Ice damming. Driven by attic heat loss, not the roof material itself. But certain materials handle backed-up ice water better than others.
• Wind uplift. The Bay of Fundy coast and the open Tantramar Marshes routinely see 100+ km/h gusts. Shingle adhesion strip quality is non-negotiable.
• UV + thermal cycling. Long summer days and dramatic temperature swings between freezing nights and 25°C afternoons crack shingles faster than steady climates do.

Architectural asphalt shingles

The default for a reason. Modern laminated/architectural shingles (sometimes called "dimensional" shingles) are several layers of asphalt-coated fibreglass mat fused together, designed to look like cedar shake.

Where asphalt wins

• Most budget-friendly. The most affordable mainstream roofing option in Moncton — meaningfully less than metal or rubber for the same roof.
• Repairability. If a tree branch takes out three shingles, we replace three shingles quickly and inexpensively. Metal and rubber repairs are far more involved.
• Wind ratings. Premium architectural shingles (GAF Timberline HDZ, IKO Dynasty) carry 130 mph wind warranties when installed with the correct nailing pattern.
• Algae resistance. 10-year algae warranties are now standard, which matters in NB's humid summers (those black streaks on older roofs are algae, not dirt).
• Manufacturer warranties. 25–50 year material warranties depending on the line.

Where asphalt loses

• Real-world lifespan vs. warranty. A "50-year shingle" doesn't last 50 years in NB. Realistic lifespan: 22–28 years for premium architectural, 12–18 years for entry-level 3-tab.
• Wind warranty fine print. Most shingle wind warranties require six nails per shingle, not four. Many crews still nail four. The warranty is only as good as the install.
• Granule loss. Heavy rain and freeze-thaw progressively strip the protective granules. Check your gutters — black sand-like material is shingle granules.

Standing-seam metal roofing

Long panels of pre-painted steel or aluminum, mechanically seamed together, with hidden fasteners. The premium roofing option for NB conditions — and the right answer for more houses than people think.

Where metal wins

• Lifespan. 50+ years installed correctly. Many NB metal roofs from the 1970s are still on their original panels.
• Snow shedding. Snow slides off, eliminating most ice dam scenarios.
• Wind performance. Properly clipped standing-seam panels handle 150+ mph wind. Excellent for coastal homes.
• Fire resistance. Class A non-combustible — a real factor as wildfire risk creeps into Atlantic Canada.
• Resale. Metal roofs are increasingly seen as an upgrade and recover 60–70% of cost at resale, vs. 50–60% for asphalt.

Where metal loses

• Higher upfront investment. Metal is the premium tier for residential roofing — meaningfully more than asphalt at install. The lifecycle math usually catches up over 20+ years.
• Snow shedding (yes, also a downside). Snow that slides off a metal roof can damage decks, gutters, plants, or people. Snow guards are essential over walkways and doors.
• Noise. Modern installs with proper underlayment (synthetic + ice-and-water shield + sound-dampening foam) are nearly silent. Older installs are not.
• Repair complexity. Replacing damaged panels is a bigger job than swapping shingles.
• Coastal salt. Standard galvanized steel corrodes near salt water. Coastal homes (Shediac, Bouctouche, Saint John waterfront) need Galvalume or aluminum, not standard galvanized.

Rubber roofing (EPDM & TPO)

Single-ply membrane in big sheets, used on flat and low-slope sections — porches, additions, dormers, garage roofs. EPDM is the black rubber; TPO is the white/grey thermoplastic. Both have their place.

Where rubber wins

• The only correct material for flat roofs. Shingles literally cannot shed water on slopes under 2:12.
• Lifespan. 25–35 years installed correctly.
• Reflectivity (TPO). White TPO reflects summer heat, lowering cooling costs on flat-roof additions.
• Seam integrity. Heat-welded TPO seams are stronger than the membrane itself.

Where rubber loses

• Punctures. A dropped tool or a satellite installer with the wrong shoes can puncture a membrane.
• Install cost. Comparable to mid-tier shingles per square foot, though rubber is typically used on much smaller areas (porches, additions, dormers).
• Aesthetics. Black EPDM looks like… black rubber. Most rubber roofs are out of sight from the street, which makes this a non-issue.

Cedar shake & other niche materials

Cedar shakes look stunning on the right house but are a poor fit for NB's wet climate (rapid moss/algae growth, 25-year lifespan reduced to 15–18 in wet zones). We don't recommend or install cedar shake. Slate and clay tile are gorgeous and last 100+ years but typically require structural engineering of the roof framing — the right answer for very few NB homes.

The "Roof Rejuvenate" option

If your existing asphalt shingles are 12–18 years old, showing some dryness and minor granule loss, but no structural damage, a full replacement may be premature. Roof Rejuvenate is a soy-based bio-oil treatment that restores flexibility and oils back into asphalt shingles, extending their life by 5–10 years for a fraction of what a full replacement would cost.

It's not magic — it can't fix curled, lifted, or broken shingles. But for the right roof at the right age, it's the smartest 30 minutes of homework you'll do.

What actually causes roof failures in NB

After hundreds of inspections across Greater Moncton, here's what we see fail far more often than the shingles themselves:

• Inadequate ice-and-water shield. Code minimum in NB is 36" up from the eave; on north-facing roofs and shaded areas, 6 ft is much smarter. Many older roofs have only the cheap minimum.
• Poor attic ventilation. An attic that's too warm causes ice dams; an attic that's too humid grows mould on the underside of the sheathing. Soffit-to-ridge ventilation done right is more important than the shingle brand.
• Missing or undersized step flashing. Where the roof meets walls, chimneys, and dormers. The single most common leak source.
• Improper nailing. Overdriven, underdriven, or staple guns where nails were specified.
• Bypassing the ice-and-water shield at valleys. A roof's lowest-elevation lines accumulate the most water and ice.

This is why two roofs in the same Moncton subdivision, with the same shingle brand, can have wildly different outcomes — the install matters more than the product label.

So what should you put on your house?

Our straightforward recommendations:

• Most NB family homes (single-family, 6:12 to 9:12 pitch): Premium architectural asphalt shingles, properly installed with ice-and-water shield extended to 6 ft minimum, six-nail pattern, and full attic ventilation upgrade.
• Coastal homes (within 5 km of salt water): Aluminum or Galvalume standing-seam metal — the salt-air premium pays for itself.
• Steep roofs (10:12 and over) or hard-to-access roofs: Metal. You don't want to do this job twice.
• Long-term owners (planning to stay 20+ years): Metal pays back over time on lifecycle cost.
• Flat or low-slope sections: EPDM or TPO rubber, never shingles.
• Older roof in decent shape: Get a Roof Rejuvenate inspection before committing to replacement.

The right answer depends on your house, your timeline, and your budget — which is why every J.A. Kelly roofing quote starts with an on-site inspection, not a price-per-square quote over the phone. See our roofing services page or get in touch via the contact page.

Frequently asked questions