The pre-manufactured sandwich panels (composite panels) are excellent choice for heat insulated roof and wall cladding of industrial and commercial buildings. Sandwich panels with coated steel armouring on both the external and internal sides and with a heat insulated filling (polyurethane or mineral wool with higher specific weight) are widespread in the construction industry. The broad range of panels regarding type, thickness and colour allows optimal choice in respect to aesthetics, function and technical requirements (load-bearing, heat insulation capability, fire resistance and soundproofing). The steel coating of the panels is available with statically defined thicknesses and colour according to demand of the investor. The main component parts of the sandwich panels are the double-sided armouring (steel sheets) ensuring external surface protection and the infill heat insulation material (insulation core). Building material pre-produced under in-plant circumstances is meant by using the expression “sandwich panel”. The most common and most often used sandwich panel in case of industrial hall buildings is the heat insulated, self-supported sandwich panel with double sided metal (hot-dip galvanized steel sheet in most cases) armouring. The filling heat insulation material can also be of various types (fibre or foam in general): mineral wool, glass wool, polyurethane foam, phenol foam expanded or extruded polystyrene. Every heat insulation material has pros and cons regarding the technical parameters, the most suitable one has to be chosen according to the concrete requirements in each case. Panels with PUR/PIR filling perform better considering the coefficient of thermal conductivity and specific weight, while panels with mineral wool filling have better parameters for fire-protection.

Technical specifications, utilization

Sandwich panels that are easy-to-mount but are really complex considering their technical specifications, since it depends both on the material of the different components and the cohesion (adhesion) between them. Fast and easy mounting is allowed with pre-manufactured, large-board, self-supported sandwich panels (longitudinal grooved joints and fastening with self-drilling screws) that is an economic solution in case of covering large, homogenous surfaces. Sandwich panel is the most widespread roof and wall cladding solution of industrial, agricultural, commercial and other type of hall buildings for that very reason.