How do I winterize my garage door before a New Brunswick winter?

Winterizing your garage door before a New Brunswick winter involves inspecting and replacing weatherstripping, lubricating all moving parts, checking the balance and alignment, and ensuring the door's insulation and sealing are ready for six months of temperatures that regularly reach -20 to -30 degrees Celsius. Spending an hour or two on this in late September or early October can prevent frozen components, drafty gaps, and mechanical failures during the coldest months when you need your door working reliably every day.

Start with the weatherstripping. Inspect the bottom seal by closing the door and looking from inside — if you can see daylight under the door or feel cold air coming in, the seal is worn, cracked, or compressed beyond usefulness. NB's freeze-thaw cycles and road salt accelerate bottom seal deterioration, so replacement every 3 to 5 years is normal. Check the side and top weatherstripping (the vinyl or rubber strips on the door frame) for gaps, tears, or sections that have pulled loose. Replace any damaged sections before winter — a complete bottom seal, side, and top weatherstripping package costs $80 to $150 in materials and is a manageable DIY project.

Lubrication is critical for NB winters. Cold temperatures thicken lubricants and increase friction on all moving components. Apply a silicone-based or lithium-based garage door lubricant (not WD-40, which is a solvent, not a lubricant) to the torsion springs, hinges, rollers, bearing plates, and the lock mechanism. Spray the spring coils generously and work the door up and down a few times to distribute the lubricant. Pay special attention to the rollers — nylon rollers just need their bearings lubricated, while steel rollers need lubricant on both the bearings and the roller surface where they contact the track. Proper lubrication prevents the grinding, squealing, and sluggish operation that cold weather causes and extends the life of every moving component.

Test the door's balance by disconnecting the opener (pull the red emergency release cord) and manually lifting the door halfway. A properly balanced door should stay in place when released at the halfway point. If it drifts up or falls down, the springs are out of adjustment. Do not attempt to adjust torsion springs yourself — the tension involved can cause serious injury. Call a garage door technician before winter to have the springs properly adjusted, typically costing $100 to $200 for a service call.

Inspect the door panels for cracks, dents, rust spots, or gaps between sections. Steel door panels in NB develop rust at the bottom edge where road salt and snowmelt collect — sand any rust spots lightly and apply a rust-inhibiting primer and paint to prevent further corrosion. Check that all panel hinges are tight and that no bolts have worked loose from the vibration of daily operation.

Check the garage door opener. Test the auto-reverse safety feature by placing a board flat on the floor in the door's path — the door should reverse immediately upon contact. Test the photoelectric sensors by breaking the beam while the door is closing. Replace the backup battery if your opener has one, since power outages during NB winter storms are common and a working battery backup lets you operate the door when the grid is down. If your opener is more than 15 years old and struggles in cold weather, consider upgrading to a modern belt-drive unit with a DC motor, which operates more smoothly in extreme cold than older AC chain-drive units.

For uninsulated doors, consider adding an insulation kit before winter. Pre-cut polystyrene or reflective foam panels press-fit into each door section, costing $50 to $150 for a standard two-car door. While they will not match the R-value of a factory-insulated door, they reduce heat loss noticeably and help prevent condensation inside the garage.

Finally, clear the area around the door tracks and the garage floor near the door of any debris, leaves, or items that could interfere with the door's operation. Make sure the floor drain (if you have one) is clear so snowmelt from vehicles can drain properly throughout winter. Consider applying a silicone spray to the bottom seal and threshold to prevent the seal from freezing to the concrete on extremely cold nights — a frozen bottom seal can tear when the door opens.

Most of this winterization is well within DIY capability, but if you discover spring problems, track misalignment, or panel damage, bring in a professional before winter sets in. Need help finding a garage door technician? New Brunswick Garages can match you with local contractors for free.