The garage door pass thru is only about an inch and a bit high so there isn't much gap between the door and the ground. Also, remember to adjust the garage door setting to close more gently as it strikes the ground. Some garage door openers have this feature to be adjustable.AIs it letting any critters in? Since the gap that’s left open? Was thinking about getting this once my Y comes in. My garage is too small and can’t fit the car.