PUR/PIR SANDWICH PANELS consist of two galvanised and pre-lacquered steel sheets with thicknesses of 0.38 mm to 0.60 mm and a core of Polyurethane Foam (PUR) or of Polyisocyanurate (PIR), with a density of 36-40 kg/m³, manufactured on 6 continuous production lines. The characteristics of our PUR/PIR SANDWICH PANELS are closely linked to the chemical processes of polyurethane (PUR) polymerisation: once the chemical reaction has ended, the polyurethane foam contains millions of irregular cells, which are what ultimately provide the thermal insulation, resilience, acoustic characteristics, etc. The thermal insulation capacity of polyurethane is due to the gas trapped in the closed cells of the polymer network. As a result, polyurethane foam with a density of 30-60 kg/m³ is highly effective thermal insulation material. A variant is PIR polyurethane foam, which, thanks to its chemical composition, improves the fire behaviour of the panel, achieving a Bs1d0 classification.
USES OF PUR/PIR SANDWICH PANELS
PUR/PIR SANDWICH PANELS are mainly used in modular construction, prefabricated houses, industrial and agricultural-livestock buildings and, in special cases, also in traditional construction. The most common uses of PUR/PIR SANDWICH PANELS in construction are the following:
As thermal insulation in roofs and façades, as well as in false ceilings and in air chambers of sanitary floor slabs.
As rigid, lightweight and economical cladding material in roofs, façades, false ceilings and interior partitions.
INSTALLATION OF PUR/PIR SANDWICH PANELS
PUR/PIR SANDWICH PANELS are simple to install on any metal, wood, brick or concrete support thanks to their reduced weight and easy assembly, for both roof and façade applications. For façade panels, there are two fastening options: exposed fasteners or concealed fasteners, in both cases without thermal bridges.
ADVANTAGES AND DISADVANTAGES OF PUR/PIR SANDWICH PANELS
The main advantages of using PUR/PIR SANDWICH PANELS compared to Rock Wool SANDWICH PANELS are the following, among others:
They provide better thermal insulation, making them the ideal solution for the thermal insulation of façades and roofs in all types of agricultural buildings, industrial warehouses, modular constructions, prefabricated houses, etc.
They are lighter in weight and are therefore easier to handle during installation, while also being highly durable due to the properties of the polyurethane, which is an extremely long-lasting and inert product that does not rot and resists the absorption of moisture.
They allow the concealed fastening of façade panels, thereby giving them an elegant architectural appearance.
The main disadvantages of using PUR/PIR SANDWICH PANELS compared to Rock Wool SANDWICH PANELS are the following, among others:
Their acoustic insulation capacity is lower than that of Rock Wool SANDWICH PANELS.
Polyurethane foam is combustible, although its fire behaviour can be improved with additives to achieve the Bs2d0 classification in the case of PUR and the Bs1d0 classification in the case of PIR.
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