Aluminum Arch Window – Custom Geometry, Uncompromising Performance
This type of window is one of the most distinctive and architecturally compelling fenestration elements available to designers and builders. The graceful curve of an arched head transforms an ordinary window opening into a focal point that elevates the entire facade, lending an air of craftsmanship, elegance, and permanence that rectangular windows alone cannot achieve. SKATE's aluminum arch windows are produced using our bendable-grade 6063-T5 aluminium profiles, cold-bent with precision tooling to achieve smooth, consistent arcs across any radius - from gentle shallow curves to full semicircles, full-circle oculus windows, pointed Gothic arches, and complex compound shapes.
The Art and Science of Curved Aluminium
Bending aluminium profiles for architectural windows is not a simple operation. The material must be carefully selected for its bend grade, the bending process must be controlled to prevent surface distortion or cross-section deformation, and the thermal break strip within the profile must maintain its integrity through the bending process. SKATE's production team uses dedicated CNC-controlled bending machines calibrated to produce consistent curves across multiple profiles within the same batch - ensuring that the curved head, jambs, and sill of an aluminum arch window all align precisely during assembly.
The curved glass required for aluminium arch windows is produced using heat bending or cold bending of standard flat glass sheets, with the specific process chosen based on glass thickness, radius, and performance requirements. All curved glass supplied by SKATE meets the same optical and structural standards as flat glass units in our product range.
Technical Specifications
| Shape Options |
Round, Semicircle, Triangle, Arch, Trapezoid, Custom |
| Profile Material | 6063-T5 (Bendable Grade) |
| Profile Wall Thickness |
1.6 mm / 1.8 mm |
| Thermal Break |
Flexible PA66 GF25 Strip |
| Glass Options | Custom Shaped DGU / TGU |
| Glazing Thickness |
24 mm (5+14A+5) |
| Air Leakage |
≤ 0.1 cfm/ft² | Class 4 (EN 12207) |
| Water Tightness |
E1000 Pa (EN 12208) |
| Wind Load |
≥ 2500 Pa | Class C5 |
| Sound Insulation (Rw) |
Rw 38 – 45 dB |
| Available Materials |
Aluminium / Vinyl / Alu-Clad Wood |
| Certifications | CE, NFRC, AS 2047 |
Shape Options Available
SKATE manufactures aluminum arch windows in a comprehensive range of geometric forms:
- Semi-circular arch: The most classic form, with a curved head rising to a full half-circle above a rectangular lower section.
- Elliptical arch: A shallower, wider curve offering a more horizontal emphasis.
- Gothic (pointed) arch: Two opposing arcs meeting at a point, widely used in ecclesiastical and heritage architecture.
- Full circle / oculus: A complete circular window, often used as a feature in gable ends, stairwells, or above doors.
- Triangle / delta: A three-sided geometric window ideal for gable walls and contemporary design.
- Trapezoid: A four-sided asymmetric window suited to angled roof lines and sloped wall sections.
- Custom compound shapes: Any combination of the above, or entirely unique geometries, can be produced to supplied drawings.
Fixed and Operable Configurations
This type of windows are most commonly specified as fixed (non-operable) units, particularly where the arch extends to the full height of the window opening. However, SKATE can produce operable arch windows where a rectangular casement or awning sash occupies the lower portion of the frame, with the fixed curved light forming the arched head above. This configuration provides both the decorative impact of the arch and the practical ventilation of an operable window.
Thermal Performance
The flexible PA66 GF25 thermal break strip used in SKATE's aluminium arch window profiles accommodates the bending process without fracturing, maintaining the thermal isolation between the interior and exterior aluminium sections throughout the curved length. Combined with shaped DGU or TGU units, the arch window delivers thermal performance consistent with SKATE's rectangular window range.
Surface Finishes
Curved aluminium profiles accept the same powder coat, anodised, PVDF, and wood grain finishes as straight profiles. All curved sections within an aluminum arch window are finished using automated spray processes before bending to ensure complete and even coverage, followed by post-bend touch-up where required.
Applications
4454rominent features in: Georgian and Victorian residential architecture; Mediterranean-style villas and homes; neo-classical commercial buildings and banks; places of worship and heritage institutions; high-end luxury residences seeking distinctive window focal points; and contemporary architectural projects using curved forms as design elements.
Frequently Asked Questions
Q: Can SKATE produce an arched window from an architectural drawing?
A: Yes. We work from DXF, DWG, PDF drawings, or site measurements to produce aluminum arch windows to exact specifications.
Q: Is curved glass more expensive than flat glass?
A: Yes - shaped glass commands a premium due to the additional processing involved. The cost varies with glass thickness, radius, and quantity. We provide detailed quotations based on your specific requirements.
Q: How are arch windows measured for replacement purposes?
A: We require the overall width, the spring point height (where the arch begins), and the rise (height of the arch above the spring line), plus the type of arch (semicircle, ellipse, Gothic, etc.).
Why Choose SKATE
SKATE's 29 years of aluminium fabrication expertise, combined with dedicated CNC bending equipment and in-house curved glass sourcing, makes us a reliable one-stop partner for aluminum arch window projects of any complexity. We serve over 30 countries and hold CE, NFRC, and AS 2047 certification.
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