Lindner – Raised Floors : The NORTEC raised floor system offers impressive in-built properties and truly state-of-the-art technology. It is the ideal product for almost any field of application. NORTEC floor panels give superb underfoot comfort. They are manufactured from calcium sulphate (gypsum): a non-combustible material with superlative structural and physical properties. This product also offers outstanding levels of soundproofing.