Sometimes there is not enough headroom for the roller casing of a Roller Garage Door. In these circumstances you have two main choices. One is to look towards the Vertico Garage Door which requires very little headroom. Alternatively you can choose to have your Roller Door externally fitted.
All this really means is that the whole door is reversed and installed on the outside rather than the inside. In effect it is very similar to large Roller Security Shutter.
On this Roller Door installation we had to extend the floor in the form of a ramp to stop water getting in and allowing any vehicle to easily get into the garage.