UPVC double glazed Windows and doors by Zealcon Pakistan

'Unplasticized Polyvinylchloride' (UPVC) is used extensively throughout the world, especially in European countries in the building industry to manufacture items such as water and drain pipes, gutters and electrical conduits to name a few, and is also used to extrude window and door frames. Its rigid and durable qualities make uPVC an ideal material for this application.

Most people are familiar with the benefits that uPVC brings to the window industry, such as weather and sound proofing, not to mention longer lasting performance compared to windows made from other materials.
ZealCon windows are manufactured in a large modern plant, equipped with the latest window manufacturing equipment. Saws used are computer-controlled for accuracy and welding equipment is computer programmed so that each weld is perfect every time. But most important of all, each and every window is thoroughly checked by hand all the way through the manufacturing process by people who care to make sure you get the best product possible, all the time.

At ZealCon each new window is treated as something special right from the very start. Every order is computer analyzed and a separate cut sheet produced for every window size, nothing is left to chance

ZealCon products can be used in modern homes, offices, schools, hospitals, and shopping plazas - practically everywhere you can imagine! With hinged or tilt-and-turn windows, inward and outward opening, the choice is yours.
ZealCon can provide the right windows and doors for every home, however modest or prestigious; we have something for everyone!
Over the last 20 or 30 years uPVC or rigid vinyl or vinyl siding windows have taken over as the most popular window type from aluminum windows. When you look at the energy savings that uPVC windows provide it is easy to understand this shift in trend.

The problem with aluminum windows is that aluminum is a metal and a good conductor and poor thermal insulator. In contrast uPVC is a plastic which provides high thermal resistance. This means that uPVC windows are good at stopping the transference of heat and cold between inside and outside a house. So in winter uPVC windows keep the heat in and cold out; and in the summer they keep the cool in and the heat out. It is estimated that just one uPVC window can save a homeowner $20 per winter in heating costs. Aluminum windows on the other hand, seep out heat in the winter and let out the cool air in the summer.

uPVC windows are the same price as aluminum windows, can be made in all styles including patio doors, stable doors and bow windows. uPVC can be printed to look like wood or any other style. They last 35 years with minimal maintenance and are impervious to humidity.

It is easy to understand why aluminum windows became less popular.