The selection of one or another of the mentioned materials may lead to the need of using supporting or enclosing material. “Soft” or easy to disaggregate material, such as rockwool, may require an enclosing structure to provide the panel with the necessary mechanical stability or to prevent the gravity falling effect of the disaggregation over time. Clean area SOP requirements may require the enclosure of any insulating material within the panel. The choice of the material used for the supporting/ enclosing structure may be dictated by the consistency with the material used for skin support. It will not make sense to use a higher quality material, such as aluminum, if the supporting skin is galvanized steel.
Generally using a system that needs supporting skin structure presents the following pros and cons:
Advantages:
-It allows the use lower class material not exposed to the clean areas, thus reducing costs
Negatives:
-In case of scratches or wall chipping low class material exposed to the environment
Carbon Steel: in most cases galvanized carbon steel is used
Advantages:
-Low cost
-It allows for Class A fire certification
-Good mechanical stability
Negatives:
-In case of scratches lower class material exposed to the clean area
-In case of scratches contact with water and cleaning agents may lead to rust and corrosion
-Difficult to handle for modifications on site
-Difficult to handle for flush built accessories and covings
HPL 3 mm: high-pressure laminate impregnated with phe-nolic resins; generally used as supporting structure for Stainless steel or PVC coating
Advantages:
-Consistency with the use of HPL 4 mm for integration with door and coving profiles used in other areas
-Good mechanical stability
Negatives:
-High cost
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