Plastic window frames are known for their long lifespan. However, this can vary considerably from one frame to another. So how long do they actually last? That depends mainly on the quality. In this article, you can find out what is realistic and what you should look out for.
How long do plastic window frames last on average?
A plastic window frame lasts on average around 50 to 75 years, and so often lasts a lifetime. The material does not rot, hardly warps at all and is largely unaffected by the elements. However, that average doesn’t tell the whole story, as a cheap window frame will by no means always reach that age. Exactly how long they last depends mainly on the quality of the window frame you choose.
Not all plastic window frames are the same
The crux of the matter is that there is a huge difference in lifespan between a cheap, entry-level window frame and a genuinely high-quality one. A good window frame has a sturdy profile, often with a steel core, and robust hinges and locks. A UV-resistant top coat is also important, as it prevents the window frame from discolouring. Such window frames remain in good condition for decades, whereas a thin and lightweight version will warp or wear out much sooner.
The installation is just as important. A sturdy window frame that has been fitted professionally will last longer than an expensive one that has been poorly installed. Professional installation ensures that the window frame is watertight and stays securely in place. That is why it matters who you choose to do the job.
How can you tell if a window frame is of good quality?
There are a few things that tell you the quality of a plastic window frame. For example, pay attention to the number of chambers in the profile, as more chambers make the profile sturdier and therefore less prone to warping. Also ask about steel reinforcement within the profile and about high-quality hinges and locks. A neat, clean corner joint is also a sign of a carefully crafted window frame that will retain its shape for a long time. Finally, choose a supplier who also installs the window frames themselves. When supply and installation are handled by the same company, everything fits together better, which extends the product’s lifespan. What’s more, we provide a guarantee on our installation work.
Do plastic window frames discolour or turn yellow?
Plastic window frames used to discolour, but with good-quality products this no longer happens. The first generations would turn a yellowish shade when exposed to the sun. Modern, high-quality window frames have a UV-resistant top coat that prevents this, meaning they retain their colour for years, even on the sunny side of the house. With very cheap window frames that lack this top coat, there is still a risk of discolouration.
How much maintenance is required?
It is precisely because it requires so little maintenance that plastic lasts so long. Unlike wood, it does not need to be painted regularly to stay in good condition. This means there is no backlog of maintenance that secretly shortens its lifespan. It is, however, a good idea to check the rubber seals and gaskets from time to time. Worn rubber seals allow moisture and draughts to get through, which shortens the product’s lifespan.
When do plastic window frames need replacing?
Even the best window frame will need replacing one day. Keep an eye out for signs such as draughts around the windows, gaps, or windows that are difficult to open and close. Condensation between the panes indicates a leaky window, and worn rubber seals are a sign of wear and tear. Often, a minor repair or new glass is all that’s needed, and there’s no need to remove the entire window frame. A professional will quickly assess what’s best for your situation.
How do they compare with wood and aluminium?
Compared with other materials, uPVC scores highly in terms of durability and convenience. Hardwood lasts just as long, but you do need to paint it regularly. Modern, good-quality uPVC window frames combine a long lifespan with low maintenance.
What trade-off between plastic or wooden window frames What suits your home best naturally depends on more than just its lifespan.
In short, plastic window frames are long-lasting, often lasting between 50 and 75 years, but exactly how long depends on their quality. That’s why you should opt for a sturdy profile, robust fittings and professional installation. Are you unsure about the quality of your current window frames, or would you like to know what suits your home best? Please feel free to get in touch, and we’ll look into it together.
