Glass-fibre-reinforced laminate can replace the internal steel sheet in selected roof panels for agriculture. It primarily changes the surface exposed to moisture and the building environment. It is not an additional type of wool nor a replacement for the PIR core. When selecting, the resistance of the specific facing, the documents for the entire panel and the cleaning rules must be checked. The name laminate alone does not confirm suitability for every cowshed or piggery. In such a solution, the external roof facing may be profiled steel, the middle is the insulating core, and laminate is present on the inside. The composite contains glass fibres embedded in plastic. This is a different construction from a typical steel–core–steel panel.

The support spacing for an insulated wall panel follows from the loads and the parameters of the specific product. The core, the thickness of both facings, the support arrangement, the colour and the permissible deflection all matter. The fixings and fire requirements must also be checked. There is no single safe distance suitable for all 100 mm panels. Reading a table only makes sense when its assumptions match the actual project. The wall works under wind pressure and suction. The values depend on the building, its location and the façade zone. Corners and edges may require different verification than the central field. Self-weight and the effect of temperature are additional factors. Loads should not be chosen on the feeling that the structure stands in a calm area.

The same thickness does not mean the same insulated panel. The price depends on the core, both facings, coatings, the joint and the declared properties. Lengths, colour, order size and the reason for any price reduction also have an influence. Compare products intended for the same function and calculate the cost of the complete enclosure. It is worth first explaining the price difference through the specification, and only then assessing it as a saving. In a wall panel, the thickness usually defines the cross-section of the element in accordance with its data sheet. In a roof panel, the high profiling of the steel sheet is also present. A designation with two dimensions may distinguish the core thickness and the overall height at the rib. The price should not be compared on the basis of the larger number alone.

The thickness of an insulated panel is selected to suit thermal performance, loads and building requirements at the same time. The information 'heated hall' alone is not enough. You need the core type, the support arrangement, the facings, the operating conditions and the fire requirements. A thicker panel can improve insulation, but it does not solve every problem. The selection should be based on the documentation for the specific product and the entire building envelope. Define the function of the rooms and the operating temperature. Note whether the building will be heated continuously, periodically or not at all. In a cold store the conditions are different from those in a workshop or a warehouse for dry materials. Humidity and the environment on both sides of the panel also matter. Then separate the walls and the roof.