Can you open an insulated roller door in the event of a power cut?

In the event of a power cut you can operate the door via a manual override handle that is supplied with all doors. This facility is only applicable for emergency circumstances. You must have an alternative access point to get inside your garage to use the manual override should there be a power failure.

If you do not have alternative access to your garage you would need to also consider installing an external emergency override that con operate the door without the need to access the garage.