How do I protect my garage siding from salt spray near the Bay of Fundy?

Protecting your garage siding from Bay of Fundy salt spray starts with choosing the right cladding material and follows through with regular maintenance — vinyl siding is the most salt-resistant common option, while wood and some metals require significantly more attention in coastal NB environments. Salt spray is corrosive, persistent, and driven by the strong winds that sweep across the Bay of Fundy, so passive material resistance is your first and most important line of defence.

Vinyl siding is the best-performing affordable option for garages near the Bay of Fundy. It does not corrode, does not absorb salt, and does not require painting. Salt deposits rinse off with a garden hose or a gentle pressure wash each spring. At $4 to $8 per square foot installed, vinyl is also the most budget-friendly cladding. Choose a premium grade with a minimum thickness of 0.044 inches — thicker panels resist wind-driven impacts better, and the Bay of Fundy coast is known for strong sustained winds that can flex and crack thinner vinyl. Ensure the installation includes proper J-channel, trim, and flashing details to prevent salt-laden water from reaching the sheathing and framing behind the siding.

Fibre cement siding (HardiePlank) at $8 to $14 per square foot installed is another excellent choice for coastal NB garages. The material itself is impervious to salt — it will not corrode, rot, or degrade from salt exposure. However, the factory-applied or field-applied paint finish is the vulnerable layer. Salt spray accelerates paint chalking and fading, so fibre cement siding near the Bay of Fundy may need repainting every 8 to 12 years rather than the 15 to 20 years typical for inland locations. When repainting, use a high-quality 100% acrylic exterior paint rated for coastal environments — products from manufacturers like Benjamin Moore, Sherwin-Williams, or Dulux that are specifically formulated for salt and UV resistance.

Wood siding requires the most maintenance near the Bay of Fundy. Salt spray penetrates paint film and natural stains, accelerating wood degradation. If you choose wood — perhaps to match a heritage home or achieve a specific architectural look — use naturally rot-resistant species like eastern white cedar or western red cedar, and apply a penetrating marine-grade stain rather than a film-forming paint. Penetrating stains do not peel or blister when salt moisture gets beneath them, unlike paint which lifts and traps moisture against the wood. Plan on restaining every 3 to 5 years in a coastal NB location, compared to every 5 to 8 years inland.

Metal siding and trim are vulnerable to salt corrosion if not properly finished. If your garage uses any metal components — aluminium fascia, steel corner trim, metal soffit panels — ensure they are factory-coated with a baked-on finish rated for coastal exposure. Bare or lightly coated steel will develop rust streaks within a few years of Bay of Fundy salt exposure. Stainless steel and aluminium fasteners should be used throughout — galvanized fasteners eventually corrode in salt environments, leaving rust stains on the siding.

Beyond material selection, there are several practical steps to protect any garage siding in a coastal NB location. Annual washing is the single most important maintenance task — rinse the garage exterior with a garden hose or low-pressure washer every spring to remove accumulated winter salt. Pay attention to the side facing the prevailing wind, which takes the heaviest salt deposition. Inspect caulking and sealant joints around windows, doors, and trim annually, as salt accelerates caulk degradation. Replace any cracked or missing caulk with a high-quality exterior sealant. Maintain a clearance of at least 6 inches between the bottom of the siding and the ground or any hard surfaces — this prevents salt-laden splash-back from reaching the siding during rainstorms. Landscaping buffers — hedges, fences, or windbreak plantings on the salt-spray side of the garage — can significantly reduce the amount of salt reaching the siding, though this depends on your property layout and wind patterns.

If you are building a new garage near the Bay of Fundy or replacing siding on an existing coastal garage, a contractor experienced with Maritime construction will understand these considerations. New Brunswick Garages can connect you with siding and construction professionals in the Bay of Fundy region through the New Brunswick Construction Network.