Rubber floor seals
Garage floor rubber rebate seals , I dependant of garage door, bonded to a concrete floor offer added weather resistance. No garage door can be totally air tight but we can help by adding extras such as these seals. It's not a standard component with the door but when added it forms a physical barrier to alleviate and deter water ingress when fitted at rear of the door. It is not visible from the outside either maintaining crisp lines. Ask for detail when ordering your door. Typical cost fitted with a door.... Single doors £50 and double width doors £80.
It's a consideration but often not essential.