Aluminium Windows: Slim Profiles, Superior Strength

Why Specify Aluminium Windows?

Aluminium’s inherent strength allows for much slimmer frames than UPVC, maximising glass area for better views and more natural light. This makes aluminium the material of choice for architecturally significant projects, large commercial glazing, and heritage steel window replacements.

• Slim Sight Lines Maximise Light
  Aluminium frames can be 40-50% slimmer than equivalent UPVC profiles whilst maintaining structural integrity. This translates to significantly more glass area, which can transform basement conversions requiring maximum light, commercial offices prioritising natural daylight, apartments with limited window openings, and contemporary architecture where minimal frames are integral to design.
  The difference is substantial: a 2m x 2m window in aluminium provides approximately 15-20% more glass area than UPVC, flooding interiors with noticeably more natural light.
• Superior Strength for Large Openings
  Aluminium’s strength-to-weight ratio is exceptional. This allows for larger window sizes and configurations that would be impossible with UPVC, including floor-to-ceiling glazing in commercial developments, wide-span windows in modern residences, curtain walling systems, and structural glazing applications where frames must support significant glass weight.
  For architects and developers pushing design boundaries, aluminium enables glazing solutions that other materials cannot achieve.
• Exceptional Longevity
  Aluminium doesn’t corrode, rust, warp, or rot. Powder-coated finishes are extraordinarily durable, maintaining appearance for 40+ years with minimal maintenance. For prestige developments, commercial buildings with long-term value considerations, or coastal locations where weather exposure is extreme, aluminium’s proven longevity justifies initial cost premiums.
  Buildings fitted with quality aluminium windows in the 1970s and 1980s often still have original frames in excellent condition – a testament to the material’s durability.
• Thermally Efficient When Specified Correctly
  Modern aluminium windows incorporate thermal breaks: insulating barriers within the frame that prevent heat transfer. Quality aluminium achieves excellent energy efficiency, comparable to UPVC when specified with appropriate glazing.
  This makes aluminium suitable for new builds requiring building regulations compliance, refurbishments improving thermal performance, and commercial buildings where operational costs matter.
• Heritage Steel Window Replacement
  Aluminium perfectly replicates heritage Crittall windows and steel-framed glazing common in 1920s-1950s buildings. Slim profiles match original steel aesthetics whilst incorporating modern thermal performance and eliminating the maintenance and corrosion issues that plague steel windows.
  For industrial conversions, Art Deco buildings, schools, hospitals, and commercial premises originally fitted with steel windows, aluminium provides authentic appearance with contemporary performance and longevity.

When to Specify Aluminium Over UPVC

Aluminium costs more than UPVC. This investment is justified when:

• Slim aesthetics are architecturally important – Modern developments, prestige projects, design-led residential
• Large window sizes exceed UPVC capabilities – Floor-to-ceiling glazing, wide spans, structural glazing
• Heritage steel replacement is required – Industrial conversions, 1920s-1950s buildings, Crittall replacements
• Longevity justifies the premium – Prestige commercial developments, long-term investment properties
• Coastal or exposed locations – Aluminium’s corrosion resistance suits harsh environments

For standard residential developments, social housing, or projects where budget constraints apply, UPVC typically delivers better value. Aluminium excels where its specific advantages justify cost premiums.