Most experts agree that aluminium is the better material with which to make windows from. Aluminium is inherently strong and requires no extra reinforcing of its frames. Because of their strength, aluminium frames can be made slimmer in profile compared to upvc windows. This makes them look neater and allows more light into your home due to the increased glass area.
UPVC windows have a high coefficient of thermal expansion which makes them prone to twisting and warping, especially when exposed to a lot of sun. This means they can start to let in drafts and even rainwater after only 10 – 15 years. Aluminium on the other hand is not nearly as sensitive to higher temperatures and UV radiation. Aluminium windows can easily last up to 40 years and beyond.
UPVC windows can be recycled at the end of their useful life. However, it is a difficult and expensive procedure due to the presence of polymers and reinforcing material. Alternatively, aluminium frames can be recycled repeatedly with virtually no deterioration in quality.