
Fixed windows, commonly known as vision lights, serve as critical components in architectural design where structural integrity and thermal performance supersede mechanical operation. Unlike operable units, custom fixed windows are engineered to remain stationary within the frame, allowing for larger glass spans, higher-performance wind-pressure ratings, and optimized thermal resistance coefficients. For engineers and procurement teams, selecting the right fixed unit involves a precise balance between frame material, glazing specifications, and the specific environmental stresses of the installation site.
The choice of framing material dictates the window's resistance to thermal expansion, corrosion, and mechanical load. In industrial environments, the decision-making process usually centers on the atmospheric conditions and required structural rigidity.
Because fixed windows do not move, the glazing system can be optimized for performance far beyond standard operable units. This allows for the integration of triple-pane insulated units or laminated safety glass that would be too heavy or complex for moving hardware.
| Glazing Type | Primary Technical Benefit | Typical Application |
|---|---|---|
| Double Glazed with Argon | Thermal insulation (U-value optimization) | Office blocks, laboratories |
| Laminated Safety Glass | Impact resistance and acoustic attenuation | Industrial warehouses, high-security zones |
| Low-E Coating | Solar heat gain management (SHGC) | Energy-efficient facades |
| Tempered Glass | Thermal shock resistance and safety | Commercial kitchens, floor-to-ceiling spans |
Custom fixed windows require precision manufacturing to ensure a water-tight seal within the building opening. Unlike off-the-shelf components, our custom units are fabricated based on specific CAD drawings, allowing for non-standard dimensions that integrate seamlessly into existing structural frames.

The production process begins with CNC-guided cutting of frame profiles to maintain dimensional accuracy within ±1.5mm. The glazing process utilizes high-performance EPDM gaskets or structural sealants that maintain elasticity over decades, preventing the common failure point found in lower-quality installations.
While specifications vary by project requirements, the following represent our standard baseline for industrial-grade fixed units:
Wind load ratings: Up to 4000 Pa (customizable based on thickness). Water penetration: Class 4-5 rating.
U-value: 1.1 to 2.8 W/m²K depending on glazing and frame break.
Finishes: Powder coating (micron-specific thickness), Anodizing, or PVDF finishes.
To mitigate risk during procurement, every custom order undergoes a rigorous inspection protocol. This includes dimensional verification against project submittals and water ingress testing. For international shipping, we utilize reinforced timber-crated packaging with internal bracing to prevent frame racking or glass fracture during transit.
Lead times are determined by the complexity of the glazing and the volume of the production run. We provide detailed production schedules to ensure site managers can align delivery with construction milestones.
Contact our engineering team with your CAD files or site requirements for a technical review and quotation.
Request Technical Data & QuotationYes, custom fixed units can be manufactured to match the profile depth and thermal break of existing curtain wall systems to ensure aesthetic consistency and structural continuity.
Span limits depend on glass thickness and frame reinforcement. Typically, steel reinforced aluminum frames can support significant spans, provided wind-deflection calculations allow.
We utilize thermally broken extrusions (polyamide strips) to separate the interior and exterior aluminum, significantly reducing heat transfer and preventing condensation.