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If you open your garage manually, you don’t need sensors. If you have an automatic garage door opener, sensors are required by law. The federal law UL 325 mandates that all residential garage door openers in the U.S. must include sensors. Designed to prevent accidents and reduce the risk of entrapment, the sensors should be able to reverse the motion of the garage door within two seconds of detecting an obstruction. The sensors are there to keep you, your family, and your belongings safe from a door that might otherwise come down too hard or too fast.

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.

If push comes to shove, and you need to manually open your garage door, then you should be able to do so. To manually open your garage door, first, make sure that the door is in the down position. You’ll need to unlock your garage door opener’s emergency release mechanism, which is typically a red robe that you can find on the carriage. Once you’ve pulled the cord, you can manually lower the door.

If your garage door is stuck in an open position, consider contacting a professional to safely release the opener.

A prefab, or prefabricated garage, requires far less construction work than one with a foundation and frame, but it’s not nearly as desirable and may not be a worthwhile option. A prefabricated garage won’t be as durable or long-lasting, and it doesn’t provide the same protection for your belongings and vehicles. Plus, you can use a standard garage for more uses—like living space—whereas a prefab garage only serves as a space for storage. Lastly, building a traditional garage will add to your home value, while a prefab garage usually won’t.