In closed installation, a shutter box protects the rolled up curtain of the roller garage door. It not only has an elegant design, but also protects the roller garage door and the mechanical components inside the shutter box from environmental influences. Closed assembly is the most common choice for the private and commercial sectors. Open mounting is also referred to as mounting without a shutter box. If you need extra wide and extra high garage doors, open installation without a shutter box is the perfect solution for optimal use of space. Open mounting is often used in underground garages and in industrial areas.