Sandwich panels have excellent energy-saving characteristics, good aesthetics, are assembled quickly and thus have a wide application – commercial and office buildings, prefabricated frame buildings, including warehouse complexes, industrial sites and agricultural structures.
The core of the sandwich panel (insulation layer) provides such characteristics as durability, heat and sound insulation and fireproof properties.
Sandwich panels made of polyurethane foam are convenient to install due to their low weight (in most cases, the density of foamed polyurethane in the panels is from 32 to 40 kg/m3) and have higher energy-saving characteristics (λ = 0.020-0.021 W/mK) in comparison with mineral wool.
Foamed polyurethane does not absorb moisture and thus can be successfully used in panels for car washes, swimming pools, industries with increased humidity, as well as objects located near water bodies.
As the most common material, mineral wool is always used in sandwich panels with increased requirements for fire resistance (up to EI360), for example in fireproof partitions. The U-value of mineral wool varies in the range of λ = 0.038-0.044 W/mK. Depending on the required characteristics, mineral wool of different density is used in the structure of the sandwich panels: low density (less than 90 kg/m3) – for internal partitions, medium density (95-115 kg/m3) – for external walls and roof panels or with increased density (120 kg/m3 and more) – for fire-resistant partitions and wall panels with increased bearing capacity. The characteristics of mineral wool have caused the wide use of sandwich panels with such a core in the construction of warehouses for combustible materials, fire-hazardous industries, as well as buildings with increased acoustic requirements.
Foamed polyisocyanurate (PIR) is a new generation of polyurethane core (λ = 0.020-0.021 W/mK) with fire resistance up to EI45. E-PIR type polyisocyanurate foam core has fire resistance EI15-EI30, while X-PIR- up to EI45.
IPN is a brand of modified polyurethane foam (λ = 0.020-0.022 W/mK) used in Kingspan sandwich panels. In this case, the IPN according to its characteristics corresponds more to the X-PIR type, while the IPN-L is close to the E-PIR. A disadvantage of IPN is the absence of this type of core among those recommended in the European standard DSTU B EN 14509: 2014, which complicates the confirmation of quality characteristics for products with such a core and does not guarantee its long life.
Panels filled with foamed plastic have the worst operational characteristics, which is why, as a rule, they are used to build temporary structures with a useful life of up to 10 years and no requirements for fire protection, since the foam is combustible. Apart from this, foamed plastic has low noise reduction and leads to the spread of mold. The only advantage of foam sandwich panels is their low cost.
Installation of Sandwich Panels
The panels are mainly installed on wooden or metal supporting structures. Fixing is done using modified screws and support clamps. All finishes are available in the same colors as the panels.
Standard panels come with a right side overlay and a 50mm cross cover that is not foam treated. The panels can also be ordered with a larger transverse overlap, not treated with foam.
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