... , excellent rigidity, good impact resistance Excellent in heat insulation, sound insulation, fire-, acid-, alkali-, weather-resistant and non- ... apartments Other kinds of buildings as an ideal decorative materials for interior and exterior of buildingDecoration of interior walls, ceilings ... 4, 5 , 6 mm. ( 2mm, 3mm for interior use, 4mm, 5mm, 6mm for exterior used) 3, Aluminum alloy sheet thickness: ...