Metal Rock Wool Sandwich panels generally consist of two outer metal sheets (steel, aluminium, other) with a stabilizing core of insulation sandwiched between them. The metal sheets are bonded to the insulation core with specialized adhesives. The outer surface of the sheets can be flat, slightly corrugated or with a significant profile (eg. for roofs, walls or external facade design). A huge assortment of shapes, coatings and colours is available. Because rock wool sandwich panel installation requires only a limited number of mechanical fasteners (eg. screws), the resulting constructions avoid significant thermal bridging. To achieve distinctive architectural features, metal rock wool sandwich panels with hidden joints are available.
For several decades, metal sandwich panels with mineral wool cores have been used successfully in fast track construction, conferring numerous advantages compared to ‘build on site’ systems.