Aluminium vs PVC Joinery – Which Is Right for You?

When it comes to choosing windows and doors for a new build or renovation, two materials dominate the conversation: aluminium and PVC (uPVC in some regions). Each has its strengths, limitations, and loyal supporters. PVC is known for being budget-friendly and offering decent insulation, while aluminium stands out for its strength, modern aesthetics, and long-term performance. The real question is: which is the right fit for your project? In this article, we’ll dive into a detailed comparison, so you can make an informed, future-proof decision.

Aluminium: Slim, sleek, and endlessly customisable. Thanks to its strength, aluminium can hold large glass panes with minimal framing, creating the clean lines and open views sought after in modern architecture. Powder coating allows for over 2,000 colours and finishes, including realistic woodgrain effects, metallic tones, and matte textures. Colour remains stable for decades, resisting UV fading.

PVC: Bulkier frames are often necessary to achieve the same structural strength as aluminium, which can limit design options. Colours are typically limited, and although foil laminates offer some variety, they can peel or fade over time.

Winner: Aluminium – especially for high-end, design-driven projects.

Aluminium: Naturally strong and rigid, aluminium doesn’t warp, crack, or expand under temperature changes. It’s highly resistant to weathering, making it ideal for large sliding doors, curtain walls, and coastal applications. With minimal maintenance, aluminium frames can last 40–50 years or more.

PVC: While it performs well for smaller openings, PVC can weaken and deform over time, especially in hot climates. Reinforcement with steel is often necessary for larger windows, adding weight and complexity. Lifespan is typically around 20–30 years.

Winner: Aluminium – unmatched structural stability.

Historically, PVC was considered the better insulator, but this has changed.

Aluminium: With thermal break technology, modern aluminium systems now rival PVC in insulation. Polyamide inserts between inner and outer frames reduce heat transfer dramatically. Combined with double or triple glazing, aluminium can meet stringent energy efficiency standards, keeping interiors comfortable year-round.

PVC: Naturally a poor conductor, PVC offers good thermal performance without additional technology. However, frame thickness and reinforcement needs can affect efficiency.

Winner: Tie – both materials can achieve excellent insulation when designed properly.

Aluminium: Virtually maintenance-free. Occasional cleaning with mild soap is enough. Powder-coated finishes retain their appearance for decades without repainting.

PVC: Requires regular cleaning to prevent discolouration, especially in white frames. Over time, exposure to UV can cause yellowing, and foil laminates may peel in extreme conditions.

Winner: Aluminium – less upkeep, longer-lasting aesthetics.

Aluminium: 100% recyclable without loss of quality, and recycling uses just 5% of the energy needed for new production. Many manufacturers use recycled aluminium content.

PVC: Technically recyclable, but the process is more complex, and not all recycling facilities accept it. PVC production also involves chlorine-based chemicals, raising environmental concerns.

Winner: Aluminium – the greener choice in the long term.

Aluminium: Higher initial cost, but superior lifespan and minimal maintenance mean a lower cost over the product’s life.

PVC: Lower upfront investment, which can make it attractive for budget-sensitive projects. However, shorter lifespan and more frequent replacements can offset the initial savings.

Winner: Depends on budget – aluminium is an investment, PVC is short-term savings.

• Choose Aluminium if you value modern design, large glass panels, long-term durability, and minimal maintenance. Ideal for contemporary homes, commercial projects, and properties in harsh climates.
• Choose PVC if budget is the main concern, the openings are relatively small, and the style is more traditional.

The choice between aluminium and PVC joinery is more than a financial decision — it’s about how you want your home or building to look, feel, and perform over decades. PVC may suit smaller budgets and modest projects, but aluminium offers unmatched style, strength, and longevity. For those who see windows and doors as an investment in comfort, aesthetics, and property value, aluminium is the clear winner.