5. Thermal insulation materials, technical
2021-2-9 · The vapour barrier can be achieved either through watertight surfaces of prefabricated insulation panels (sandwich-type panels, with one face being the vapour barrier of light-gauge galvanized steel sheets and the other face being the internal finish of plastic-coated aluminium or galvanized iron sheets), reinforced plastic materials, polythene sheets, plastic films of minimum thickness of 0.2 mm …
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