A profile can arrive on site in good condition and still be damaged before it becomes part of the structure. Poorly prepared storage is a common cause. Moisture, uneven support and repeated handling are bad for thin components. Galvanised profiles need protection from water and from deformation. The storage plan does not have to be complicated. It must, however, match the material lengths and the actual sequence of work. The ground should allow packs to be laid down stably and equipment to be accessed safely. Water traps and places exposed to accidental impacts must be ruled out. Distance from the ground is also important. Cold-formed profiles should not lie directly on a wet surface. It is worth planning the bearers and their layout rather than looking for random boards during unloading.

A level grid is not created simply by screwing a row of omega profiles into place. Spacing, the cladding line and the method of fixing to the substrate must be coordinated. Cold-formed profiles form a chain of supports and connections here. Every link matters. Good geometry makes the subsequent work easier, but it must go hand in hand with load-bearing capacity and durability. It is worth preparing these points before drilling the first holes. Omega profiles can be fixed to various elements, but not every fastener is suitable for every substrate. Information is needed on the material, thickness and actual condition of the support. This also applies to refurbishment. An old substrate should not be assessed solely on its visible surface. If its parameters are uncertain, they must be established before adopting a solution.