How do I build a garage that can handle the coastal winds near the Bay of Fundy in NB?

Building a garage near the Bay of Fundy requires engineering the entire structure to resist sustained high winds and powerful gusts that can exceed 100 km/h during winter storms, with particular attention to roof uplift resistance, wall bracing, and the connections between every structural component from the foundation to the ridge. The Bay of Fundy coast — including communities like Saint John, St. Andrews, Alma, and the Fundy shore — is one of the windiest regions in New Brunswick, and garages here face forces that inland structures simply do not experience.

The fundamental principle of wind-resistant garage construction is the continuous load path — every structural connection from the roof sheathing down to the foundation must be mechanically fastened so that wind uplift forces are transferred all the way to the ground. This starts at the roof, where hurricane straps (also called H-clips or framing anchors) must connect every truss or rafter to the top plate of the wall below. In a typical inland NB garage, builders sometimes rely on toenailing trusses to the top plate, which provides minimal uplift resistance. Near the Bay of Fundy, every truss should be anchored with Simpson Strong-Tie H2.5A straps or equivalent, rated for a minimum of 500 pounds of uplift per connection. The cost for these straps is only $2-$4 each — an insignificant investment that can prevent catastrophic roof failure.

The walls themselves must be designed to resist lateral wind loads (racking forces). For a garage near the Bay of Fundy, this means using structural sheathing — 7/16-inch or 1/2-inch OSB or plywood — on all four walls, not just on corners as is sometimes done in sheltered locations. The sheathing must be nailed with 8d nails at 6 inches on centre along all edges and 12 inches on centre in the field, following the NB Building Code requirements for high-wind zones. Some builders in coastal NB go further and use 4-inch edge nailing for additional resistance. The bottom plate of each wall must be anchored to the foundation with 1/2-inch anchor bolts at a maximum of 4 feet on centre, with bolts within 12 inches of every corner and every plate break.

Roof design matters significantly in coastal wind zones. A hip roof provides the best wind resistance because wind flows over it more smoothly than over a gable roof, which presents a flat face to the wind that acts like a sail. If you prefer a gable roof for its simplicity and usable attic space, ensure the gable end walls are properly braced with lateral supports and that the gable end sheathing is securely fastened. A roof pitch of 4/12 to 6/12 balances wind resistance with NB's snow load requirements — steeper pitches shed snow well but catch more wind, while shallow pitches reduce wind uplift but accumulate snow.

For roofing material, steel or metal roofing with concealed fasteners is the preferred choice for coastal NB garages. When properly installed with the correct screw pattern and sealant, metal roofing resists wind uplift far better than asphalt shingles, which can be peeled off by sustained coastal winds. If you choose asphalt shingles, select a product rated for 130+ km/h wind resistance (such as IKO Nordic or CertainTeed Landmark) and ensure they are installed with the manufacturer's high-wind nailing pattern — typically six nails per shingle instead of four. Expect to pay $7-$14 per square foot installed for metal roofing versus $4-$7 per square foot for asphalt shingles in the NB market.

Garage doors are the most vulnerable point in a wind-resistant garage. A standard non-reinforced garage door can flex inward or blow in under high wind pressure, which then pressurizes the interior and can blow the roof off from the inside. For Bay of Fundy locations, consider a wind-rated garage door with horizontal struts or vertical bracing bars, or install aftermarket wind-load reinforcement kits on a standard door. Ensure the door tracks are securely anchored with lag bolts, not just screws.

For the best results, work with a contractor experienced in coastal construction in the Saint John and Fundy region. A professional garage builder familiar with local wind conditions will know these details instinctively. Find local garage construction contractors through the New Brunswick Construction Network at newbrunswickconstructionnetwork.com.