Specific weight: Parquet floor 500/580 kg/m3. Resistance to wear: Reproduction in thickness after 200 cycles in Navy Tape Wear Machine for abrasion resistance. Test under load of 4,5 kg on abrasive supports according to norm ASTM-C-2394 = 0,13 mm. Punching: Resistance to static punching - compressibility of 5,65%. Recuperation: Average 0,80% (NP-260). Flexibility: Bending flexibility = 33mm (UEAT c). The front side of a sample must not show any cracks if applied onto a cylinder wich is 50 times bigger than its thickness. Noise Reduction. Norme P669/1968 and ISO-R-140: Low tones: 77 middle tones: 81; high tones: 79; sound insulation: approximately 40 db (1600 Hz up 4000 Hz) on cement screed of 10 cm 250 kg/m2 (NP-669) 0,07 kcal/m2 HºC. Thermal insulation, fire resistance: M3, does not spread it, does not develop toxic gases. Chemical Features: Rot-proof material, neither rodents nor insecrts attack this material, chemically inert. Gluing: Impact glue. Maintenance: Clean with a moistened cloth, never wet. After 2,3 or 4 years it is recommendable to revarnish the floor. In order to do this the floor needs to be sandpapered and cleaned thoroughly.