Which siding survives salt air on the New Brunswick coast?

Coastal NB is one of the toughest environments for exterior cladding in Canada — but a few materials genuinely hold up. The combination of Bay of Fundy salt spray, fog, freeze-thaw cycling, and driving wind narrows your best options considerably.

Fibre cement (HardiePlank and similar) is the top performer for most coastal NB homes. It doesn't rot, won't corrode, and holds paint well even in salt-laden air. Expect to pay $8–$14 per square foot installed in the Saint John or Shediac area. The critical detail is fastening: use hot-dipped galvanized or stainless steel nails only — standard steel fasteners will rust through within a few seasons and leave streaks down your siding. Factory-primed fibre cement should be painted within 180 days of installation, and a quality exterior acrylic (Benjamin Moore Aura Exterior or similar) adds years to the finish life.

Vinyl siding is budget-friendly ($4–$8/sq ft installed) and genuinely salt-resistant since there's no metal to corrode. The weakness in coastal NB is impact — vinyl becomes brittle in the -25°C cold snaps that hit even the coast, and a flying piece of ice or debris can crack it. If you go vinyl, choose a thicker profile (.044" or better) and avoid very dark colours, which absorb heat and can warp during summer sun exposure.

Cedar and other wood sidings have a long history on NB homes — you'll see it on Victorian-era houses throughout Saint John's South End and along the Fundy shore. It can survive coastal conditions, but only with religious maintenance. Expect to repaint or restain every 4–6 years in a coastal environment versus 8–10 years inland. Back-priming every board before installation is non-negotiable. If you love the look, a cedar-look engineered wood like LP SmartSide is a more forgiving alternative — it's treated against moisture and insects and holds finish better than raw wood.

Aluminum siding was popular on NB homes through the 1970s and 1980s and actually performs reasonably well near salt water. The problem is it's hard to source and match today, so it's mainly relevant if you're repairing an existing aluminum-clad home rather than starting fresh.

What to avoid near the coast: standard steel siding (corrodes), untreated OSB-based products, and any system that relies on exposed fasteners without stainless or hot-dipped galvanized hardware. Even your j-channel, trim coil, and flashing should be aluminum or stainless — mixed metals in a salt environment create galvanic corrosion.

One detail that matters as much as material choice: proper installation with a rainscreen gap. A 3/8" drainage plane behind the siding lets moisture escape rather than sitting against your sheathing. In coastal NB's high-humidity environment, this single detail extends the life of any siding system significantly.

A full re-side on a typical 1,500 sq ft NB bungalow runs roughly $15,000–$35,000 depending on material, removal of existing siding, and whether any sheathing or housewrap needs replacing underneath. If your home has original wood sheathing (common in older Saint John and Fundy Shore homes), budget for some sheathing repairs once the old cladding comes off.

Browse siding contractors serving coastal New Brunswick in the New Brunswick Construction Network directory — look for contractors with specific coastal or marine environment experience, and always ask to see local references before signing.