Aluminium system windows

Extruded aluminium sections are light, stiff, and dimensionally accurate. By separating inner and outer aluminium shells with polyamide strips and high-performance glazing, we break cold bridges and deliver whole-window U_w figures that stand up to your SAP / SBEM and overheating check—not just a catalog Ug on glass.

When architects choose aluminium

Typical applications include:

• High-rise and exposed locations where design wind load and racking are governing.
• Reception lobbies, education, arts buildings—where a slim frame reads better on paper and in the round.
• Full-height openings paired with a curtain wall base or horizontal ribbon—same capping and finish palette.
• Refurb with tight sightlines, replacing older steel with thermally efficient modern profiles.

Polyamide & profiles

Multi-chamber polyamide (PA66) with glass-fibre when required, staggered in plan to break thermal short paths. The outer shell carries drained and ventilated cavity zones; the inner shell is warm side for condensation control. Section depths differ by series: deeper frames carry stiffening geometry and more hardware gear options without visible bulk.

Manufacturing and joints

Corners and T-junctions are mitred and mechanically crimped (and sealed where the system demands), then quality-checked for square and gasket line continuity. Splice and expansion joint details are issued per structural movement criteria so mullion loads do not end up in the wrong plane.

Opening types

• Top- and side-hung casements, projected top-hung for smoke/natural vent strategies where compatible.
• Tilt-turn for cleaning and controllable background ventilation.
• Hidden sash options with flush hardware lines on premium lines.
• Parallel-opening projected vents in deep reveals—subject to size and product notes.
• Fixed and shaped lights using the same mullion/capping logic as operables, reducing visual “patchwork” on elevation.

Glazing & spacers

Units up to 50+ mm (series-dependent) with triple, asymmetrical, or complex laminates. Spacer: stainless, hybrid, TGI, or thermoplastics to hit ψ values and avoid cold-edge issues on metal frames, which are unforgiving in condensing conditions. Solar control coatings and frits are selected against daylight factor and g limits.

Finishes & durability

Polyester powder to Qualicoat / GSB class or equivalent, RAL, metallic, anodize (AA25 where coastal). Dual-colour (inside / outside) is common for atria and lobbies. Touch-up kits and recoat intervals are part of the handover; harsh coastal sites get enhanced pretreatment in line with the supplier map.

Hardware & security

Concealed and inline hinges, multi-point with mushroom cams, and anti-lift where parallel opening. Lock routes follow tested paths on each profile—no ad hoc routing on site. Security ratings and burglar classes require exact glass, hardware, and reinforcement as per the test evidence.

Indicative technical reference

Bind the legal row to the declaration for the actual series, glass, and year of testing.

Coordination on site

We align setting-out, tolerance chain, and structural bracketry with the steel package and the masonry / rainscreen. Thermal breaks must not be bridged at brackets; we issue thermal pad / isolator callouts. Fire strategy for spandrel and compartmentation is taken from the architect’s RIBA stage package—aluminium systems interface with EI-rated infills as third-party certificated.

Schedules: replace indicative numeric bands and RAL lists on drawings with the exact values from the issued METABUILD aluminium product schedule for your order year and finish code.