Sandwich panels (also commonly known colloquially as Obornicki panels) are modern composite construction elements commonly used as wall and roofing elements in construction facilities, i.e. industrial halls, production halls, warehouses, commercial facilities, etc.
Sandwich panels are usually made of thin profiled steel sheets coated with protective and decorative coatings. There is a core made of polyurethane (PUR) or (PIR) foam, mineral wool or polystyrene between the sheets.
Such materials are characterized by a low thermal conductivity coefficient, thanks to which they guarantee the maintenance of high energy-saving parameters of the structure finished with sandwich panels.
Sandwich panels are an excellent example of the use of the latest technologies supporting energy-efficient construction.
Sandwich panels used as cladding of walls and roofs additionally provide buildings with an appropriate microclimate, and provide protection against noise and vibrations, and have a positive effect on hygienic conditions.
The simplified assembly of sandwich panels, which does not require a multi-stage construction process, enables you to minimize the time needed to install them on the building structure.
Therefore, sandwich panels are an ideal solution as a cladding material for low-cost construction. Another significant advantage of the use of cladding in the form of sandwich panels is the possibility of their easy disassembly along with the structure and transfer of the entire structure to another place without losing the insulation parameters of the structure.
Barn panels are also characterized by an attractive surface and the possibility of selecting their colours from the colour palette, which makes it possible to give the facilities an aesthetic visual value.
Sandwich panels are now used extensively in a variety of industries. They are commonly used in the construction industry, as elements of wall and roof finishing in building facilities such as industrial, production and storage halls, commercial facilities (shops, supermarkets), livestock facilities (barns, piggeries, henhouses), agricultural halls (hopper halls, halls for agricultural products), sports halls, gastronomic and refrigeration facilities, temporary facilities such as construction facilities, car workshops, car washes, craft workshops or small industrial workshops.
Sandwich panels are also used in food storage facilities, in cold stores and freezers. They are most often used as roofing materials, external and internal walls, curtain walls, partition walls or ceilings in cooling chambers and as building insulation elements.
Sandwich panels are made of coated steel sheet. The panels production process begins with the hot-dip galvanizing phase, followed by the double-sided varnishing phase, and then the surface is coated with coatings of different chemical composition.
The basic coatings used to coat sandwich panels are polyesters or polyurethane paints. This ensures a surface resistant to chemicals and biological agents, and allows the aesthetics of the wall surface to be maintained, which can be washed with a pressure washer. Finally, the board surface is protected with a protective film. The panel is filled with a core made of one of the three basic types of material: polystyrene, PUR/PIR polyurethane foam or mineral wool. Fillings made of mineral wool, polystyrene or polyurethane foam fulfill the same role, and the distinguishing features are high fire resistance in the case of mineral wool, while polystyrene is considered a cheap material.
Panels with a polystyrene core ensure excellent thermal insulation of buildings. They are a very economical solution for the implementation of roofs, walls, facades, partition walls or partitions in industrial and residential construction, but also in public utility construction (shopping centres, warehouses, etc.).
Polystyrene sandwich panels can be used in the case of small objects as external and internal structural walls, curtain walls attached to the load-bearing structure, roofing or insulation of external walls. They are used wherever a light hall cladding is required.
The chemical composition of polyurethanes (PUR foam - polyurethane, PIR foam - polyisocyanurate) used as the core of the panels is characterized by high thermal insulation. They differ in fire properties, which are higher in the case of PIR foam. In addition, polyurethane panels, compared to panels with a polystyrene core, are characterized by greater stiffness and better thermal insulation.
Sandwich panels are used to create facades of hall buildings and public utility buildings. In this case, the aesthetics of the buildings will play an important role, so panels with a hidden fastening system will be much better, because you can get the effect of a smooth facade with great visual value thanks to them. Sandwich panels are also used in the construction of walls in workshops, warehouses and farm buildings. In this case, the appearance of the facility is of secondary importance and panels with visible fastening can be used without any problems.
Mineral wool boards have very good fire resistance, thermal insulation, and additionally they absorb sound very well, which is important in the construction of facilities which are demanding.
The wool sandwich board is non-flammable as opposed to the polystyrene board or polyurethane board.
The core of mineral wool is completely non-flammable (rock wool), so that the panels with such a core can be used in the construction of facilities with increased fire requirements, and even as fire barriers. Moreover, hard mineral wool is harmless to the natural environment.