Yep insulated door , and I know what you mean that's the price is with a full box as well . He said ideally it would of been a box section as when it's fully shut the last slat leans forwards so he said if I bolt a timber to the steel it will sit on that instead of leaning even further forwards in the void of the steel if you know what I mean plus it will give another fixing point as we are right on the edge of the pad stone.

Cheers paul