So, you've finally purchased a new garage door. What's next? Installing it, of course! Garage door installation is a process that can take time and require so much attention to detail, as well as physical effort since garage doors, on their own, can weigh so much. Installing a garage door opener can also be physically demanding and may also require electrical know-how since garage door openers are like small machines that have their own motor. To an untrained person, doing your own garage door installation may not be a sound plan as it can get very risky.