While you can install a garage door without a floor in place, we don’t recommend it. In order to safely and accurately install your door, our policy requires there to be garage flooring before we will install your garage door. When our technicians install garage doors, they need to make sure that the bottom of the door is completely flush with the floor. If there isn’t a professionally installed floor in place, the ground in your garage will inevitably be somewhat uneven, making it practically impossible to install your garage door without gaps or cracks along the bottom edge.