Sliding systems Solarlux Systems makes a range of aluminium and glass folding/sliding doors, which can be fully opened to eliminate any barrier between inside and out. Both the SL35 and SL45 systems are top-hung and have quiet and height-adjustable running gear, and the SL50 and SL70 are bottom-running. Doors are available anodised or in a range of powder-coated finishes, and …