Facet room is the space demanded on all sides of the door to allow for attachment with the vertical track assembly. We selected the Avante AXU by having an insulated business grade aluminum body (black anodized end) and tempered, insulated apparent glass. The doorway hardware and track are powder-coated black. https://qsafkjg.worldblogged.com/34931283/fascination-about-garage-doors