The problem with garage doors is the wind comes in all round the door, not just the bottom.
I don't know how you could deal with that on a conventional up & over door. Anything at the sides would interfere with it opening.
I have a Clopay (pretty well the standard garage door in the US) sectional door which I got from B&Q years ago but they don't seem to be sold in the UK anymore. That slides almost vertically in the opening and then the guides press it against rubber edging on the top and sides of the opening - works very well.
I'm just left with a 1.5cm gap between the bottom of the door and the concrete floor.