Aluminium window frames were historically popular for strength and formability. Their natural thermal conductivity required fixes; modern solutions like polyamide thermal breaks, low-E glass, and gas-filled double/triple glazing now deliver energy performance comparable to other systems. Aluminium remains attractive for slim profiles, large glazing, durability, and recyclability, though upfront costs and coastal corrosion protection should be considered.

Why aluminium frames became common

Aluminium window frames rose to prominence in the mid-20th century because they were strong, easy to form into thin profiles, and resisted rot. Over subsequent decades many homeowners and builders favored aluminium for commercial and residential glazing.

Historically, aluminium held a large share of the window-frame market before PVC (uPVC) and engineered timber became widespread, but its market position changed as plastic frames grew in popularity in the 1980s and 1990s.

Thermal performance - the modern fixes

A key technical issue with aluminium is that it conducts heat and cold more readily than most framing materials. Left untreated, aluminium frames can create thermal bridging and reduce the benefit of insulated glass.

Manufacturers now address this with polyamide thermal breaks in the frame, warm-edge spacers, and by pairing frames with double or triple glazing filled with argon or krypton and low-emissivity (low-E) coatings. These combinations bring aluminium-framed windows' overall U-values into line with other high-performance systems when specified correctly.

Strength, security, and lifespan

Aluminium's strength lets manufacturers make slimmer sightlines and larger glazed areas without bulky frames. That strength also improves resistance to warping, and - when combined with laminated or toughened glass - adds security against break-ins.

Aluminium does not rot like timber and does not "rust" like iron, though untreated aluminium can corrode in aggressive coastal environments. Modern finishes such as anodizing and polyester powder coating largely prevent corrosion and reduce maintenance needs.

Cost and sustainability

Aluminium frames historically were competitive with timber and offered advantages in manufacture and shaping. 1 Today, the upfront cost of aluminium frames tends to be higher than mass-market uPVC but can be comparable when you choose thermally broken profiles and durable finishes.

A major sustainability advantage is recyclability: aluminium is widely recycled and often contains a significant share of recycled content, which reduces embodied energy compared with primary aluminium.

Choosing aluminium double glazing

If you prioritize slim profiles, large glazing areas, long service life, recyclability, and modern thermal performance, aluminium double-glazed windows are a strong option. To get best results, specify thermally broken frames, low-E coatings, and gas fills for the cavity.

Ask suppliers for accredited performance data (U-value, Psi, and air/water/wind ratings) and for corrosion protection if you live near the coast. These details determine whether an aluminium window will meet your comfort, security, and energy goals.

  1. Verify historical market-share figures for aluminium window frames in the 1960s-2000s and update exact percentages if needed.
  2. Confirm historical cost comparisons between aluminium and other framing materials (timber, uPVC) for the periods referenced and update any specific claims.

FAQs about Aluminium Double Glazing

Are aluminium-framed windows energy efficient?
Yes - when specified with thermal breaks, low-E coatings, and gas-filled double or triple glazing, aluminium frames can achieve energy performance comparable to other modern window systems.
Do aluminium windows corrode or rust?
Aluminium does not rust like iron, but it can corrode in salty or aggressive environments. Anodizing or quality powder-coat finishes and proper installation greatly reduce that risk.
How long do aluminium windows last?
With good finishes and standard maintenance, aluminium windows commonly last for several decades while retaining structural stability and appearance.
Are aluminium frames more expensive than uPVC?
Upfront costs for aluminium frames are often higher than basic uPVC, particularly for thermally broken profiles and premium finishes, but durability and recyclability can offset lifecycle costs.
Do aluminium frames improve security?
Yes. Aluminium's strength allows slimmer profiles with larger glazing and, when combined with laminated or toughened glass and good locking hardware, provides strong resistance to forced entry.

News about Aluminium Double Glazing

Everest double glazing windows review (now part of Anglian Home Improvements) - FMB, Federation of Master Builders [Visit Site | Read More]

Which is the best type of double glazing? - which.co.uk [Visit Site | Read More]

Anglian vs Everest – Double Glazing Windows Review - FMB, Federation of Master Builders [Visit Site | Read More]

Double glazing grants in the UK 2026 | What help is available? - FMB, Federation of Master Builders [Visit Site | Read More]

Double Glazing Prices And Costs - which.co.uk [Visit Site | Read More]

How double glazing has evolved since the 1980s - The Telegraph [Visit Site | Read More]

CR Smith Double Glazing Windows Review - FMB, Federation of Master Builders [Visit Site | Read More]