They are suitable for loading bays, factories, warehouses and any applications where security is required together with thermal insulation. Roller shutters provide a virtually unobstructed opening and when open, the shutter and mechanism are out of the way above the doorway and clear of any risk of damage from vehicles moving through the opening. The doors are robust and have a long life with little maintenance required. These doors have been used extensively on projects worldwide where their strength and robust design assures longevity of life and reliability of operation.