Unplastisized polyvinyl chloride or uPVC is often used in the construction industry for its insulation and weather resistant properties. That is why uPVC is often used to make windowsills and window frames more energy efficient and weatherproof. In recent years, uPVC windows have become increasingly popular because issues such as reducing the carbon footprint and fuel poverty are burning issues.

uPVC is a harder material than wood; therefore, uPVC windows are better at retaining heat inside a building than timber-framed windows.That type of window can reduce heat loss by up to 90%. This also means they also contribute to generating savings on energy bills because uPVC contributes to improving a building's overall insulation.

Not only are uPVC windows energy efficient, they are also extremely weatherproof.
The fact uPVC is a harder material than wood also means that unlike timber framed windows, uPVC windows do not leak or rot unlike timber frame windows, which on the long term tend to show signs of wear and tear. They can thus adapt to all types of weather as they will not let the rain and will contribute to keeping the house warm by retaining the heat from the sun.

However, uPVC windows do not only contribute to making a home more efficient or more weatherproof, they also have an invaluable aesthetic value. The latest developments in uPVC windows have them looking identical to traditional timber frame windows, as they are now available in a wide variety of colours and textures. What's more, uPVC windows can also be made to have a similar texture as a timber framed window, as they are now available in a photo effect wood finish. These properties mean uPVC windows can adapt to any type of home and enhance its looks; from the ultra-modern apartment to the thatched cottage.

Due to their energy saving properties and their aesthetic properties, uPVC windows have become increasingly popular. In the UK 80% of people who are on the rental market, want a property with double glazing windows. For that reason also, uPVC double glazing windows are the most popular type of window.