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With good maintenance, garage doors can last for 15 to 30 years. You might consider a replacement if yours is approaching that age and struggling to work properly. For instance, if your garage door is slow to open or close (or doesn’t open or close at all) or is loud even after lubricating the parts, you might need a new one. Similarly, if it’s sagging, uneven, or has other visual signs of wear and tear, it may be time for an upgrade.

How long garage doors last depends on the type of doors you buy and how well you care for them. But most often, garage doors will last between 15 and 30 years, on average. You can maximize their life span by performing regular maintenance and inspections and repairing problems immediately. A more robust material, like triple-layer steel garage doors, may even last 25 to 30 years with proper care.

You should spray garage door lubricant on its important mechanical parts, including the hinges, rollers, springs, bearing plates, lock, armbar, and, potentially, rail. Do not lube the tracks, though you should clean these regularly for optimal performance.

Garage door insulation can last anywhere from 20 to 100 years depending on the type of insulation. Cellulose has the shortest lifespan coming in at between 20 and 30 years, while spray foam, mineral wool, and fiberglass can last between 80 and 100 years with proper maintenance. 

Humidity plays a role in how long more susceptible insulation materials—like fiberglass—last. Once fiberglass batts reach the 15-year mark, you'll need to routinely inspect your insulation to ensure that it is in mint order.