Sandwich panel holds hidden frame structure that can be metal, wood, composite etc.
Surfaces are commonly sheetmetals, wood, composites panels, fiberclass etc.
Main insulator material are polystyren, polyurethan, glassfoam. Thigness of panels is 30 – 240 mm. Multilayer sandwich panels can be done and that allows to increase thigness further more. Single panel size without seems can be up to 4 m x 15 m.
Energy effiency structure k-value is from 0,12-0,6.
Fire proof constructure. Standard structures can offer fire classes P1-P3, RE30-RE60, REI15
Self-supporting sandwich structures 50 mm starts at 5-7 kg/m².