Each panel of the Diamond Master Door is a single aluminum extrusion which interlocks with adjoining panels. This produces a tight fit hinging arrangement and provides excellent weather sealing properties. Unlike Wood roll up doors there are no hinges and associated fasteners thereby limiting operational and maintenance issues. Being made of Aluminum the Diamond Master Door is light weight to operate and also reduces vehicle gas consumption - but they're tough. The doors are not influenced by moisture therefore no warping, swelling or loss of integrity over time. For added strength and insulation Aluminum Backing Sections can be attached to the Panels. Contact Diamond sales staff to discuss your requirements and obtain a same day quotation.