In a commercial premises, the wall by the entrance and the back-of-house partition serve different roles, even though they may have similar dimensions. The choice between first grade and outlet should take these roles into account, as well as the condition of the specific panel. A reduced price does not describe the type of deviation. Appearance, installation and confirmed properties must be assessed separately. On a façade visible from the pavement, a consistent shade, gloss and regularity of joints will be important. In an enclosed dry storage area, a minor aesthetic blemish may matter less. This does not, however, mean technical freedom in the back-of-house. Requirements for load-bearing capacity, thermal insulation and fire protection derive from the function and the design.

A good cut begins before the tool is started. You need to know why the opening is being made, how the element will be supported and how the edge will be closed. In a sandwich panel, two steel sheets and the core work together. An accidental cut can therefore change the load-bearing capacity, airtightness and durability, even when the line looks straight. Shortening a panel to the agreed length and making an opening for a window are different tasks. An opening removes part of the cross-section and changes the flow of forces. Its size, position relative to the supports and distance from the edge must be assessed for the specific system. There is no single safe size for all products.

Droplets on the steel sheet do not prove that every sandwich panel is defective. Most often you need to check the air humidity, the surface temperature and the tightness of the details. In an equipment drying room, a workshop or a store that is only occasionally heated, conditions change quickly. Before you add another layer of insulation, establish where the water comes from. Note whether the droplets appear after rain, after the heating is switched on or after wet items are brought in. In a kayak store, moisture can come from clothing and equipment. In a workshop, the source is often washing or a wet floor. Observing when it occurs helps to distinguish condensation from a leak.