Bespoke special shape aluminium window on an architectural building
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Aluminium Windows

Special Shape Aluminium Windows

When standard rectangular windows won't do, our bespoke special shape aluminium windows deliver architectural impact. From arched heads and circular porthole windows to triangular gable lights and fully custom geometric forms, we supply special shape aluminium glazing to architects, developers and homeowners across London and the South East.

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Any shape

Triangles, arches, circles, trapezoids and fully bespoke polygons — all achievable in aluminium.

Thermal performance

Thermally broken frame with argon-filled glazing for excellent energy efficiency.

Structural integrity

Precision-engineered aluminium profiles maintain structural rigidity in any shape.

CAD design

Full CAD bespoke design drawings provided as standard for every special shape order.

In situ

Special shape windows in different environments

Arched window as an architectural feature on a building facade
Triangular window in a gable end of a contemporary home
Bespoke circular round window as an architectural feature

Product overview

Bespoke geometric aluminium windows for architectural projects

Special shape aluminium windows are designed and manufactured to your exact geometric specification — whether that's a simple arched head, a triangular gable light, a circular porthole or a fully bespoke polygon. The thermally broken aluminium profile system can be curved, mitred and fabricated to virtually any shape.

The polyamide thermal break maintains energy efficiency across the full perimeter of the frame. Argon-filled double or triple glazed units are cut to match the frame geometry. Available as fixed lights or with opening vents where the shape permits.

All frames are finished in T5 powder coat in any RAL colour. CE marked to EN 14351-1. Supplied bespoke with CAD design drawings provided for approval before manufacture. 8–10 week lead time across London, Essex and the South East.

ArchTriangleCircleTrapezoidPolygonCAD design

Technical Specifications

System typeFixed or opening — any shape
Frame depth70mm system
Thermal break34mm polyamide
U-value (DGU)1.2 W/m²K
U-value (TGU)0.7 W/m²K
ShapesTriangle, arch, circle, trapezoid
CAD drawingsProvided as standard
GlazingDouble or triple glazed
Standard coloursMetal grey, Black crystal, Coffee, Skin white, Star-sky grey
Custom coloursAny RAL colour available
CE markingEN 14351-1 compliant
Lead time8–10 weeks

Typical applications

Residential architectural features
Gable end glazing
Stairwell windows
Commercial buildings
New build developments
Refurbishment projects