Curtain Wall Aluminium Profiles – Mullion & Transom Extrusions | Shengxin

Curtain Wall Aluminium Profiles are the structural skeleton of modern commercial facades. They carry the glass, resist the wind, and define the clean, uninterrupted sightlines that architects rely on. Our range covers every component of a stick-built curtain wall system: vertical mullions that span from slab to slab, horizontal transoms that tie the grid together, pressure plates that clamp the glass, and cover caps that create the finished appearance. Together, they form a complete, coordinated system.

Every profile is extruded from 6063-T5 aluminium on our 35 production lines, including a 5,500-ton press capable of producing the deep, wide sections that structural mullions demand. We control wall thickness, straightness, and twist to the tolerances specified in EN 755, because facade performance depends on it: a mullion that bows or a transom that sags will show in the finished building. Our profiles are supplied in standard 6-metre lengths, cut-to-length, or fully machined with drainage slots and screw ports ready for fabrication.

Shengxin has over 30 years of aluminium extrusion expertise and supplies curtain wall profiles to facade contractors and fabricators across 97 countries. For thermal performance requirements, see our thermally broken curtain wall profiles, which add a PA66 insulation strip to these same structural sections.

Features & Benefits

• Complete curtain wall system: Mullions, transoms, pressure plates, and cover caps are designed as a matched set, ensuring dimensional compatibility and uniform sightlines across the entire facade.
• Structural mullion capability: Deep mullion sections up to 250 mm provide the moment of inertia required to span floor-to-floor distances (typically 3.0–4.5 metres) while carrying insulated glass units and resisting wind loads up to 3.0 kPa and beyond.
• Precision-extruded tolerances: Wall thickness and straightness are controlled to EN 755 standards, ensuring straight sightlines and reliable drainage across long facade runs.
• Integrated drainage design: Mullion and transom profiles feature pressure-equalised chambers and drainage paths that channel water to the exterior, protecting the building interior and the glass edge seals.
• Pressure plate and cover cap options: Choose 50 mm or 65 mm sightlines, with square, bevelled, or rounded cover cap profiles to achieve the architectural expression you want.
• Finish flexibility: Our in-house anodizing and powder coating lines apply a durable, colour-consistent finish in clear, black, bronze, or any RAL colour. PVDF coating is available for premium durability on exposed facades.

Curtain Wall System Components

Each curtain wall project uses these profile types. All are extruded from 6063-T5 aluminium and designed to work together as a system.

All components can be supplied cut-to-length or fully machined with drainage slots, screw ports, and joint cut-outs per your fabrication drawings.

Technical Specifications

These profiles are part of our wider range of aluminum profiles for doors and windows, designed to work alongside our thermal break, casement, and sliding systems for a complete facade portfolio.

Applications of Curtain Wall Aluminium Profiles

• Commercial office towers: Floor-to-ceiling glass facades with structural mullions spanning 3.5–4.5 metres per floor. The clean vertical lines and slim sightlines are the hallmark of modern office architecture.
• Retail storefronts and shopfronts: Low-rise curtain wall systems for retail premises, combining wide glass panels with sturdy mullion and transom framing for a professional, inviting frontage.
• Hotel and residential towers: Curtain wall profiles allow maximum glazing and panoramic views, while the aluminium structure provides the durability and low maintenance that high-rise residential buildings require.
• Atria and entrance lobbies: Large-span glazed walls and canopies use reinforced mullion profiles to achieve open, light-filled entrance spaces with minimal visible structure.
• Public buildings and institutions: Schools, hospitals, and civic buildings use curtain wall systems for their combination of natural light, durability, and architectural presence.

Customisation & Supply Options

Why Choose Shengxin for Curtain Wall Profiles?

Curtain wall engineering demands profiles that are straight, strong, and dimensionally stable over long spans. Shengxin is an aluminium extrusion specialist with over 30 years of manufacturing experience and a 5,500-ton press capable of producing the deep mullion sections that structural facades require. We extrude, machine, and finish every profile in-house, giving facade contractors and specifiers a single accountable partner from die design to delivery.

Related Facade Solutions: For energy-efficient facades, see our thermal break curtain wall profiles. For window-specific systems, consider our casement window profiles. 5 container loading platforms ensure on-time dispatch.

Curtain Wall Aluminium Profiles FAQ

Custom Curtain Wall Profile Solutions

If your facade design requires custom mullion depths, unique sightline widths, or bespoke cover cap profiles, Shengxin's custom curtain wall extrusion service can design and produce profiles to your exact drawings, delivered ready for fabrication.

How It Works:

1. Send your drawing — 2D PDF/DWG or 3D STEP/IGES file showing the profile geometry and performance requirements.
2. Our engineers review — we assess extrudability, structural performance, and suggest optimisations for fabrication efficiency.
3. Receive a quotation — including die cost, unit price, and lead time.
4. Approve a sample — we extrude a trial section and send it for your approval.
5. Full production — consistent quality, delivered on schedule with full documentation.

⚠️ Important Note: All profile images and dimensional drawings on this page are for reference only. Final dimensions, structural properties, surface finishes, and hardware compatibility will be confirmed based on your approved production drawings. Please contact our engineering team to discuss your specific requirements before placing an order.