Sheet metal and sandwich panels are not the same, so the choice begins by checking whether the wall is to be cladding only or also insulation. It is worth comparing the load-bearing capacity of the substrate, the geometry of the frame, the fixing method and access for later repairs. Speed of installation alone does not determine when the façade is closed, because deliveries, openings and corners also matter. The five benefits cited for such façades depend on the design, so structural and material decisions should be left to the designer.

The choice between metal cladding and a sandwich panel depends above all on whether the wall already exists or is yet to be built. In a refurbishment, the condition of the substrate and the feasibility of fixing a supporting frame are assessed first, since new cladding will not repair a damp wall. It is worth comparing the entire wall assembly, including supports and details around openings, rather than the price per square metre alone. Also check requirements for thermal performance, fire and acoustics, and the conditions on both faces of the wall, before ordering material.

Profiled sheet and sandwich panels work well on façades because they allow a repeatable layout and a coating suited to the surroundings, but they differ in function: a single sheet forms a screen, while a panel combines facings with an insulating core. Before ordering, it is worth drawing out the divisions, since a small shift of the first sheet changes the width of cut pieces at both corners. Also check the corners, openings and lower edge, where the material meets other parts of the building. Regular profiles and cover widths make it easier to fit the layout to the rhythm of windows, doors and structural columns.