Windows, curtain wall or cladding frames
Aluminium work on a building splits into different jobs. Windows and doors are assembled from profile systems and fixed into openings. Curtain wall is a grid of mullions and transoms hung from the structure, floor by floor. Cladding sub-frames carry panels rather than glass. Each has its own system, tolerances and fixings. State which you need, and name the profile system if it is fixed, so fitters are matched on it.
