August 23, 2026|
News

If you’re weighing up what materials are best for bifolding doors in terms of durability, the choice usually comes down to three options: aluminium, timber, and uPVC. Each has a different set of properties, and each performs very differently once it’s actually fitted and facing a British winter, rather than sitting in a showroom.

As a short answer, we’d always recommend aluminium for its weather resistance, immense strength, and long lifespan of 40+ years. The strength means slimmer frames and more glass, which helps you get the most out of what bi-folds are all about, external views and sunlight.

After all, bi-fold doors are a bigger investment than a single window or an internal door, so getting the material right matters. A door system with several folding panels and a lot of moving parts will only give you peace of mind if the frame material itself can go the distance. Here’s how the three main options actually compare.

Bifold door

Aluminium: built to take a beating

Aluminium is by far the strongest of the three materials used in door sets. It’s naturally resistant to rust and corrosion, and unlike timber or uPVC, it won’t warp, fall foul of insect damage, crack, swell or rot when exposed to extreme weather conditions.

Because aluminium is so strong relative to its weight, manufacturers can use much slimmer frame sections than timber or uPVC require for the same size of opening. That’s why aluminium bi-fold doors are known for their slim sightlines, and why they can support larger panes of double or triple glazing, without needing wider frames to compensate. This is ideal if you’re looking to allow the maximum natural light into your home.

Aluminium doors typically last 35 to 40 years or more, often outperforming both timber and uPVC alternatives while needing very little maintenance along the way. A powder-coated finish protects the surface for decades and resists fading and scratching far better than paint. At Clearview, our aluminium bi-fold systems are thermally broken and can achieve U-values as low as 1.4 W/m²K, giving excellent thermal efficiency without compromising on those slim frames.

bifold door

Timber: character that comes at a cost

Wooden doors have a warmth and character that’s hard to replicate in any other material, and for period properties, timber doors are often the natural choice. Solid wood offers good natural insulation and a traditional look that many homeowners simply prefer.

The trade-off is upkeep. Timber needs regular maintenance, including repainting, staining or varnishing every few years, to protect it against moisture and temperature changes. Left untreated, wooden doors can be vulnerable to rot, warping and insect damage, particularly on external doors exposed to the weather (like bi-folds). Well-maintained hardwood can last for decades, but neglect a single winter of care and the deterioration can be difficult to reverse.

Timber is also far better suited to an entrance door than it is to a door with moving parts, like a bi-fold. It can flake with regular pressure, which aluminium simply won’t.

uPVC doors affordable now, limited later

uPVC bi-fold doors are the most budget-friendly option upfront, which makes them a popular choice, and their appeal is easy to understand. They’re low maintenance, needing little more than occasional cleaning with soapy water, and they won’t rot the way timber can, with their good energy efficiency making them a solid choice for those looking to reduce energy bills.

The limitation is longevity. uPVC is a flexible material by nature, and that flexibility becomes a weakness over time. Repeated temperature fluctuations and long-term UV exposure can lead to fading, discolouration or a slight loss of rigidity, especially on south-facing outdoor spaces that get direct sun for much of the day. Most uPVC bi-fold doors last 20 to 30 years, noticeably less than aluminium, and white frames in particular can start to look tired well before that.

uPVC is also not as strong as aluminium, and therefore the frames need to be chunkier to support the glass. This makes your bi-fold doors feel less premium and more like any old patio door. It’s also available in fewer colours than aluminium doors, which are available in over 200 RAL finishes thanks to powder coating.

The verdict: Why does aluminium win on durability?

If you set the three popular materials side by side, aluminium offers the best combination of strength, light in your living space, weather resistance, thermal performance and longevity, with the lowest ongoing maintenance of the three.

Timber wins on traditional character and uPVC wins on upfront cost, but when the question is what materials are best for bi-folding doors in terms of durability, aluminium is the best by a clear margin. For a door system with several large panels and moving parts working hard every day, that durability is what actually protects your investment. Aluminium’s resistance to warping, weathering, and daily wear makes it the superior choice for homeowners prioritising long-term durability.

This is exactly why Clearview manufactures its bi-fold doors and sliding systems from aluminium as standard. Every system is built in-house at our Huddersfield factory, backed by a 10-year guarantee, and fitted by our own experienced installation teams rather than subcontractors. We’ve been working across Yorkshire, Derbyshire, Lancashire, Cumbria and beyond for over 15 years, with an average five-star rating from over 70 Google reviews.

alunet bifold doors

Ready to invest in the best option for your home?

If you’re planning a new opening and want a door system that will still be performing well in 30 years’ time, aluminium bifolds remain an excellent choice. Get in touch with our team via our online contact form and we’ll help you find the right bi-fold doors for your home that will stand the test of time.

Online contact form: Clearview Contact Us