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STIFERITE BB a high performance insulation board manufactured from CFC or HCFC free closed cell Polyiso (PIR) rigid foam, covered on both sides by reinforced bitumenous paper. Produced by a company certified with systems ISO 9001, ISO 45001 and ISO 14001. CE conformity marking on the entire line. Dimensions:mm 600 x 1200 Standard Thickness:from 30 to 50 mm