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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.

It can take anywhere from a couple of hours to a day or two to clean out a garage. Times vary depending on the garage size, accessibility, and the amount and type of items that need sorting and lifting. A triple-car garage full of decades of clutter will take much longer to clear than a single garage with just a few unwanted bulky items.

In some cases, a detached garage can be considered extra living space, but you will need to gain permission and comply with your local building code. Depending on where you live, you may need permits for a variety of installations, including electrical work, plumbing, and structural work. Many homeowners make the mistake of converting a garage into a living space without acquiring permits, which can result in hefty fines and even the removal of your hard work. Furthermore, a detached garage doesn’t add to the livable square footage of your home when it’s time to sell.

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.