Twinpro Doors are constructed from 0.8mm thick galvanized steel sheet, formed to provide 35/45mm thick fully flush double skin door shell with seamless welding joint alround. Internal reinforcements ensure rigidity. The internal construction of the door incorporates honeycomb / Puff structure with reinforcement all around. Frame has single rebate profile with 1.2mm thick galvanized steel sheet.
The door frames and door shutters are Zinc-Phosphated and finished with pure polyester powder coating.