ALFEN Windows Pvt. Ltd. ALFEN Windows Pvt. Ltd. Aluminium, wood and Upvc have gone through severe tests, discussions and debates to win the race of being the perfect material for windows and doors. Each of the material has its own properties to suit varying requirements, as per the climate and application. Where wood was ever the first choice when you thought of bringing new door or window. Nowadays, aluminium doors and windows have taken over the fenestration industry to another level.