BASF: Approval for Double-Layer Installation in Inverted Roofs
The Deutsche Institut für Bautechnik [German Institute for Building Technology], Berlin, Germany, has now officially approved Styrodur 3035 CS, Styrodur 4000 CS and Styrodur 5000 CS (XPS: extruded polystyrene rigid foam) from BASF SE, Ludwigshafen, Germany, for double-layer installation in inverted roofs. After years of research BASF has proven that the double-layer installation of Styrodur C in the inverted roof is possible in terms of construction physics. This means that the inverted roof, which offers several advantages for flat roofs, can be applied to meet particularly stringent insulation requirements as well. Insulation material thicknesses up to 400 mm are now permitted.
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