Choosing sandwich panels for the building: types, performance and purchasing costs

Intended use matters more than appearance. A roof panel must carry roof loads and drain water; a wall panel works in a different arrangement. Cold-room panels form an enclosure across a large temperature difference. Each group has its own details and documentation.

Wall, roof and cold-room panels have different duties, so do not choose a substitute by thickness alone. Record temperature, humidity, loads and washing arrangements. For panels installed inside an existing building, describe the surrounding conditions too. This establishes the enclosure and connections actually required.

The core participates in the panel’s structural action and affects thermal insulation. Available core materials include PIR and mineral wool. Selection requires comparing thermal, fire, acoustic and structural requirements. No core is the best choice for every building.

In a sandwich panel, the bonded facings and core carry loads together. The core is not loose filling between sheets. Damage to the bond may affect load-bearing capacity, even if a panel appears serviceable from a distance. Suspected delamination requires assessment.

The U-value describes heat transmission through a building element or product under the stated conditions. A lower value means better thermal insulation; it is not the same quantity as material thermal conductivity. A selected 100 mm PIR wall panel may have Uc = 0.22 W/(m²·K). That figure applies to the particular version, not to every 100 mm panel.

Reaction-to-fire classification describes a product’s behaviour under test conditions. Fire resistance concerns the element and its assembly. A particular core alone does not guarantee the required EI classification. Check documentation for orientation, spans, fixings and seals. A number in a trade name cannot replace those details.

Describe both external and internal conditions to the manufacturer. A dry warehouse differs from a building with frequent washing and aggressive contaminants. Colour does not determine coating resistance. Establish coating type, thickness and permitted exposure conditions.

Coatings and profiles can be selected separately for the outside and inside. Food-related premises introduce hygiene requirements. Do not assume resistance to every detergent: agree approved agents, concentrations and washing temperature. Later operation should match the conditions used for product selection.

Prepare drawings of walls and roof slopes. Mark openings, supports, installation direction and panel lengths. Net area after deducting doors is useful but does not always equal the purchasing quantity. Cut-outs create waste, and not every offcut can be reused.

Check cover width. Example wall panels use 1000 or 1100 mm modules, while a selected roof version may have 1000 mm cover. These dimensions affect the enclosure layout but do not apply to all panels. Ordering only square metres without a length schedule is too vague. Roof orders must also consider cutbacks, eaves and ridge details.

Panels are only one part of the budget. Add flashings, fixings, seals, delivery and installation. The supporting structure is priced separately. Compare waste allowances and equipment requirements as well. Unloading long panels can be a significant expense on a small order.

If you use PLN 200 excluding VAT/m² for an initial budget, label it explicitly as a hypothetical calculation assumption. It does not price every PIR panel. Obtain a quote for the required thickness, facings and coating. Its scope should allow line-by-line comparison, including a check that a lower total does not simply omit accessories or delivery.

Specify the full model, quantities, lengths, facings, coatings and colours. Add required performance and documents. Agree the date, unloading method and delivery inspection procedure. Obtain installation instructions before delivery so that site readiness can be checked.

Agree transport, storage and lifting methods with the installers. Give them the design and the selected system’s installation requirements. Retain labels and specifications afterwards; they help identify material for extensions or complaints. A successful purchase provides an enclosure suited to the building, not merely a low invoice amount.

No. Model, facings, coating, performance and support conditions are also needed.

No. It needs a suitable structure, joints, flashings and installation. Each affects the final result.