We have a Henderson up & over door in our garage. We live near the coast in the north east and needless to say the garage gets very cold at this time of year. There's a 20-30mm gap at each side of the garage door which isn't helping. I'm looking to fit draught excluders and probably insult the door using foil insulation. I've noticed the garage door has a 20-300mm wide rivet/channel which run all round the door. I would imagine this is to house some kind of draught excluder but cannot find anything useful on the internet. I was just wondering if anyone knows where to get them or if the have a special name. If not ill buy the universal aluminium & rubber draught excluders (although they're not very cosmetically appealing).