Why uPVC Windows Use Foil (And Not Paint) For Color?


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Why uPVC Windows Use Foil (And Not Paint) For Color?

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Colored uPVC Windows: Best of Both Worlds

While uPVC windows offer numerous benefits over traditional wood windows, such as being low maintenance and energy-efficient, the main reason some homeowners still opt for wood is the aesthetic appeal. Natural uPVC comes in a white color and a flat surface and is very low maintenance.

upvc windows, foil color

However, colored uPVC windows can be quite versatile. Foil finishes are the preferred method for coloring uPVC window frames, as they offer a range of benefits over traditional paint finishes. Foils are a form of laminate finish that can be either smooth or that replicates the color and texture of specific wood species. They work by emulating the unique grain pattern found on the surface of wood. This allows uPVC windows to closely resemble the appearance of real wood, providing a contemporary look with the benefits of uPVC. There are also cases of using traditional acrylic paint but it is not generally recommended. 

What is uPVC Window Foil?

uPVC window foil is a laminate finish that is applied to the surface of uPVC window frames. It is designed to replicate the texture and color of specific wood species, offering an authentic wood grain appearance. The foils are applied through a heat bonding process, which fuses the foil to the surface of the uPVC. This creates a durable and long-lasting finish that is virtually unbreakable.

foil layer for windows

Unlike paint, which sits on the surface of the uPVC, foil wraps around the frame, providing a seamless and uniform appearance. The color and texture of the foil closely resemble real wood, making it difficult to distinguish from the genuine article.

Advantages of Foil-Wrapped uPVC Windows

Advantages of foil windows

Authentic wood grain appearance

One of the main advantages of foil-wrapped uPVC windows is their ability to replicate the authentic wood grain appearance. Foils are available in a wide range of wood species, allowing homeowners to choose the perfect match for their desired aesthetic. Whether it’s oak, mahogany, or walnut, the foils can closely mimic the look and feel of these wood types, providing a high-end and luxurious appearance.

Durability and longevity

Foil-wrapped uPVC windows are highly durable and built to last. The heat bonding process used to apply the foil creates a strong and resilient finish that can withstand the test of time. With proper care and maintenance, the foil finish has a life expectancy of over 30 years, making it a long-term investment for homeowners.

Low maintenance

Another advantage of foil-wrapped uPVC windows is their low maintenance requirements. Unlike real wood windows, which require regular sanding, staining, and repainting, foil-wrapped uPVC windows only need the occasional wipe down to keep them looking their best. This saves homeowners time and money on maintenance costs, making them a convenient and hassle-free choice.

Energy efficiency

(energy efficient windows: Photo by Vistaza team)

Foil-wrapped uPVC windows offer excellent thermal insulation properties, helping to keep homes warm in winter and cool in summer.

energy efficient windows

The combination of uPVC frames and double glazing helps to reduce heat loss, resulting in lower energy bills and a more comfortable living environment. The foil finish also helps to enhance the insulating properties of the window, further improving energy efficiency.

Versatility in design

Foil-wrapped uPVC windows offer a wide range of design options to suit individual preferences and architectural styles. In addition to wood grain textures, foils can also replicate other finishes, such as brushed metal or contemporary matte colors.

different design, window glass color options

This versatility allows homeowners to customize their windows (even by using different interior and exterior window colors), to match their unique taste and complement the overall design of their home.

Can uPVC Foil be Replaced?

One question that often arises is whether uPVC foil can be repaired. The answer is yes, it is possible to repair the foil on uPVC windows.

Replacing foil windows

Over time, if the foil becomes damaged or if homeowners want to change the color or texture of their windows, the foil might be worth repairing. This process involves removing the existing foil and applying a new one using the same heat bonding process.

Is There ANY Time it’s Better to Use Paint?

While foil-wrapped uPVC windows offer numerous advantages, there may be instances where paint is preferred.

paint vs foil wrap

However, it is important to note that painting uPVC windows is not recommended due to several reasons:

  • painting uPVC windows involves sanding down the surface, which can damage the uPVC and reduce its lifespan
  • paint may fade, chip, and crack over time, requiring regular maintenance and repainting
  • painting uPVC windows can also void the warranty and may affect the home’s insurance policy

Therefore, while it may be possible to paint uPVC windows, it is generally not recommended due to the potential drawbacks and limitations compared to foil-wrapped uPVC windows.


In conclusion, foil-wrapped uPVC windows offer a superior alternative to traditional paint finishes when it comes to coloring uPVC window frames. They provide durability, low maintenance, and energy efficiency. Foil-wrapped uPVC windows also offer versatility in design, allowing homeowners to customize their windows to suit their unique style. While there may be instances where paint is preferred, it is generally recommended to choose foil-wrapped uPVC windows for a long-lasting and aesthetically pleasing solution.

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