... 3.HIGHLY WATERPROOF, 4.LONG SERVICE LIFE. EPS sandwich roof panel:Technical functionUnitIndexQualificationFibre averagediameterμ m4-7GB/T13350-92Densitykg / m 37 ... 8m3. Usage: It can be used as roof panel of workshop, factory, prefabricated home, storage, villa and so on4.Advantages: ... Comparison of inner wall panel 75 and 120mm it will increase 12m practical area, for 100m2 house, it will increase 4 ...