Itchen Glass & Glazing
Aluminium Windows
Slim-framed, contemporary sightlines in a range of RAL colours, built on Sheerline aluminium systems.
- Slim sightlines
- Wide colour range
- Low maintenance
Aluminium Windows in Southampton & Hampshire
Aluminium windows give a noticeably slimmer frame than uPVC for the same size of opening, letting in more glass and more light for a genuinely contemporary look. They’re a strong, low-maintenance choice for modern extensions, renovations and new builds across Southampton and Hampshire.
Our aluminium windows are built on Sheerline’s Prestige system, winner of the King’s Award for Innovation 2025, with independently verified thermal performance behind the slim profile.
What you get with Itchen
Slim Sightlines
More glass, less frame, for a genuinely modern look.
Strong & Durable
Aluminium’s strength allows for larger panes with slimmer frames.
Wide Colour Range
A full RAL colour range, including dual-colour finishes.
Low Maintenance
Naturally corrosion-resistant, built to stay looking good for years.
Sheerline Aluminium Systems
Sheerline Aluminium Systems
Our aluminium ranges are built on Sheerline systems, winner of the King’s Award for Innovation 2025 for its aluminium window and door range.
- 01 Thermlock® multi-chamber thermal core, independently U-value tested for genuine thermal performance.
- 02 Slim, architectural aluminium frames available in a full RAL colour range, including dual-colour finishes.
- 03 Security-tested ranges, with PAS 24 and optional Secured by Design upgrades available.
- 04 Backed by a 25-year manufacturer guarantee.
Aluminium Window Specification
Built on Sheerline’s Prestige system, a 72–80mm-wide aluminium profile with Thermlock® thermal-break technology.
- Profile
- 72–80mm aluminium, with a choice of flush or standard outer frame styles.
- Thermal Performance
- U-value from 1.4 W/m²K on double glazing, or 1.0 W/m²K on triple glazing, with an energy rating of up to A+.
- Glazing
- Double or triple glazing available for improved insulation and sound reduction.
- Security
- Full-depth eurogroove for high-security multi-point locking, with an optional laminated-glass upgrade for Secured by Design accreditation.
- Construction
- Patented threaded-screw corner construction to eliminate misalignment, with concealed drainage as standard.
- Guarantee
- 25 years against warping, cracking or thermal-break separation, 25 years on powder-coat colourfastness, 10 years on gasket weatherseal.
Figures are for Sheerline’s Prestige Windows system as published at sheerline.com .
Aluminium Window Colours and Finishes
Bespoke RAL colours and dual-colour finishes are also available, so get in touch with our team for the full range, or see Sheerline’s complete colour and style options at sheerline.com/product/colour-and-style-options .
Interested in Aluminium Windows?
Request your free, no-obligation quote today.