Roof and walls sandwich panels with polyurethane PIR / PUR	Roof and walls fire resistant sandwich panels with mineral wool Mw	Roof and walls sandwich panels with polystyrene foam EPS

Sandwich panelsare tree-layer 0.4 mm to 0.75 mm sheets with a heater disposed therebetween. Heater is one of the major advantages. The core is commonly mineral wool (AKA rockwool or basalt wool), polystyrene foam (EPS) and polyurethane foam (PUR), as well as their improved fire resistant version—polyisocyanurate (PIR). Depending on the requirements and according to the building regulations, types of fillers may vary.

Figure 1. Dependence of wall thickness of the materials
used at the same thermal conductivity U=0,21 W/m²K

Sandwich panels with expanded polystyrene EPS are definitely a cheaper option. Main drawbacks include low fire resistance (E30 max), low bearing capacity and relatively high thermal conductivity.

If building regulations require increased fire resistance (60 minutes and more), sandwich panels with rock wool filler would be the only competent decision. 

Panels with polyurethane and polyisocyanurate foam are undoubted favorites among other sandwich panels. Low cost, the lowest thermal conductivity (almost 2 times lower than that of panels with polystyrene and rock wool), high fire resistance class up to EI 30, light weight, fully automated production cycle, long life (more than 25 years) provide for their leading position in the construction of prefabricated buildings.

Low weight, high durability, moisture resistance, fire resistance and high sound insulation make sandwich panels universal wall and roof construction elements.

Sandwich panels are used in the construction of various facilities—from industrial and office buildings to sports facilities. They are widely used for the construction of service stations, car washes, gas stations, warehouses. Sandwich panels are also used for making warm contours around drying chambers, etc.

They are ideally suited for the manufacture of refrigeration systems of various sizes. Dozens of low-temperature storage of large warehouses were constructed using sandwich panels. Excellent thermal insulation and high resistance to moisture absorption are especially important for these types of structures. Hygienic and easy-to-maintain surfaces of sandwich panels are extremely important in food industry where facing materials are exposed to special detergents, damp operating conditions, and high temperature environment. 

The main advantages of the panels compared to other materials:

• quick and easy assembly;
• no need of external and internal decoration;
• different variants of tin cladding;
• wide range of colors;
• hidden connections provide for more aesthetic appearance;
• panels can be assembled both vertically and horizontally;
• resistant to different operating conditions

Sandwich panels with polyurethane

Unique properties of polyurethane foam (PUR, PIR):

• low thermal conductivity (0.022 W/(m*K);
• low density (40-43 kg/m³);
• class of reaction to fire (flammability group) B-s2,d0 for PUR, B-s1,d0 for PIR;
• inflammability class (fire-resistance) up to EI15 / E30 for wall panels PUR, up to EI30 for wall panels PIR;
• high adhesive strength;
• high acoustic insulation;
• absence of thermal bridges;
• option of isolating structure;
• option of any shape and size;
• coating longevity (no degradation or decay, no seasonal temperature fluctuation, precipitation, or aggressive industrial environment degradation);
• environmental friendly;
• durability (hard polyurethane foam (PUR, PIR) is able to maintain "equilibrium" thermal conductivity for at least 50 years). Results of field trials confirm the high reputation of polyurethane foam among builders.

Sandwich panels with mineral wool

Sandwich panels with mineral wool based on basalt fiber (rock wool) are one of the most common material for the construction of prefabricated buildings. Sandwich panels with mineral wool are nonflammable materials that allow for positive assessment of fire risk. This defines a wide range of areas of application.

Basic features of mineral wool sandwich panels:

• excellent thermal and noise control characteristics;
• ease of transportation;
• large variety of color and texture options;
• long operating life;
• resistance to mechanical damage, UV radiation, multiple temperature extremes;
• resistance to aggressive factors, including chemicals;
• simplicity and ease of mounting and assembly significantly reduces the time and cost of construction, repair and finishing works;
• full environmental safety;
• full fire safety—mineral wood is an inflammable material;
• a wide variety of applications.

Features and application of sandwich panels with mineral wool

Mineral wool is very easy to cut or saw, and does not cost much. Sandwich panels with mineral wool insulationas well as panels with other types of fillers are lightweight that allows to build lightweight walling for the most daring design decisions.

Application:

• industrial buildings;
• warehouses;
• sports facilities;
• retail facilities;
• exhibition halls;
• administrative buildings.

Basalt fiber possesses good sound absorption and is used not only for thermal insulation, but also for sound insulation of buildings. Because of fibrous structure, panels are resistant to deformation, has good compressive strength and excellent elasticity.

Sandwich panels with mineral wool are durable, environmentally friendly and corrosion resistant.

	Wall fire resistant sandwich panels
	Facade sandwich panels with secret fix
	Roof fire resistant sandwich panels

Sandwich panels with polystyrene foam (EPS)

Sandwich panels with insulation made of expanded polystyrene are used for the construction of prefabricated buildings. Sandwich panels with polystyrene foam (EPS) are one of the best insulating materials. They are used for mounting wall and roof enclosures of various purposes: industrial buildings, workshops, warehouses, refrigerated warehouses, commercial pavilions and shops.

Sandwich panels with polystyrene foam are used not only as thermal insulation, but also as a soundproofing material. They allow to conduct all assembly works in the shortest time. Panels have a wide variety of color solutions, which allows to skip the entire stage of outer facade finishing.

Advantage of sandwich panels with polystyrene foam:

• environmentally friendly;
• corrosion and weather resistant;
• lightweight and moisture resistant;
• good sound insulation.

Sandwich panels of expanded polystyrene do not get wet and do not lose their heat insulation properties. They are durable and fireproof, however not as fire resistant as mineral wool.