Discover our precision-engineered aluminum glazing collections. Custom manufactured in Foshan, China for commercial, luxury residential, and industrial architectural projects worldwide.
The iconic steel-framed glazing aesthetic originally pioneered in the late 19th century by Francis Crittall has experienced an unprecedented resurgence in contemporary residential and commercial architecture. Recognized by its ultra-narrow sightlines, geometric grid layouts, and bold industrial profile, the "Crittall style" has become a staple of modern minimalist interiors, luxury villa fenestrations, and high-end adaptive reuse projects. However, legacy hot-rolled steel frames present significant engineering challenges in 21st-century construction, including excessive self-weight, high susceptibility to atmospheric corrosion, poor structural thermal conductivity, and exorbitant fabrication costs.
As China's leading premier manufacturer and global exporter of high-grade architectural fenestration, Doorreme Aluminum Industry Co., Ltd. has re-engineered this classic aesthetic utilizing advanced 6063-T6 aluminum extrusion alloys and precision thermal barrier break technologies. Our Aluminium Crittall-style doors preserve the heritage ultra-slim steel sightlines while offering dramatically enhanced U-values, superior structural wind-load performance, zero-rust longevity, and modular installation efficiency.
Information Gain Insight: Unlike basic steel replica doors that utilize surface-applied plastic tape for muntins, Doorreme’s aluminum Crittall-style systems utilize structural mechanically interlocking internal glazing beads and CNC-machined true or simulated divided lites (SDL). This design achieves structural integrity against wind pressure up to 5.0 kPa (ASTM E330) while maintaining profile sightlines as thin as 15mm to 30mm.
| Performance / Spec Metric | Legacy Hot-Rolled Steel | Doorreme Thermal Break Aluminium | Engineering Advantage |
|---|---|---|---|
| Profile Sightline (Mullion Width) | 20mm – 35mm | 15mm – 30mm | Equal or sleeker aesthetic with customized extrusion profiles |
| Thermal Transmittance (U-Value) | 3.5 – 5.8 W/m²K (Cold Bridging) | 1.2 – 1.8 W/m²K (PA66 Thermal Break) | Up to 65% reduction in HVAC energy loss; meets NFRC/CE codes |
| Corrosion Resistance & Finish | High rust risk; requires periodic repainting | PVDF Fluoropolymer / Grade-A Anodized | 30+ year maintenance-free rating in coastal marine zones |
| Acoustic Insulation (STC / R_w) | 25 – 30 dB (Single / Thin Double) | 38 – 45 dB (Acoustic Laminated Double) | Superior sound attenuation for urban high-rise & hospitality |
| System Weight & Hardware Load | Extremely Heavy (~7850 kg/m³) | Lightweight (~2700 kg/m³) | Dramatically reduces structural dead load and hardware wear |
Achieving structural rigidity in ultra-slim aluminium profile configurations requires sophisticated metallurgy and extrusion engineering. At Doorreme's 123,000 square meter production facility in Foshan, China, every profile batch undergoes rigorous spectral analysis to verify chemical composition before processing.
We specify 6063-T6 architectural grade aluminum alloy as standard, subjected to artificial aging treatments to reach a minimum Webster hardness of 12-14 HW. For high-rise exterior envelope applications subject to severe typhoon wind pressures (such as coastal projects in Florida, Australia, and Southeast Asia), high-stress components utilize structural 6061-T6 alloy profiles with minimum tensile strength exceeding 290 MPa.
Exterior Crittall-style doors must eliminate the high thermal conductivity inherent to metal framing. Doorreme integrates imported 24mm to 34mm multi-cavity Polyamide PA66-GF25 (25% Glass Fiber Reinforced) thermal break strips within the aluminum profiles. This dual-extrusion thermal isolation system forms an unbroken insulation zone that prevents condensation buildup in humid climates while dramatically curbing internal HVAC heat transfer.
Utilizes PA66-GF25 strips with foaming insulation filling to achieve frame U-factors under 0.28 BTU/h·ft²·°F for severe cold climates.
Supports double & triple toughened insulating glass (e.g., 5mm Low-E + 16Ar + 5mm) and PVB acoustic laminated safety glass.
AkzoNobel & PPG PVDF architectural powder coatings provide AAMA 2605 compliance, resisting UV degradation and salt spray corrosion.
As international building standards shift rapidly toward net-zero energy buildings (NZEB), carbon neutrality, and circular economy compliance, overseas project developers, architects, and commercial contractors face shifting procurement mandates. When sourcing Aluminium Crittall-style doors and custom architectural fenestration from China, forward-looking buyers are aligning with three core macro-trends:
Leading real estate developers in Europe, North America, and Australia now mandate EPD verification to quantify embodied carbon across the lifecycle of structural aluminum profiles. Doorreme utilizes low-carbon hydro-powered primary aluminum billets combined with up to 40% post-industrial recycled aluminum content without compromising alloy purity or mechanical shear strength. This reduces the carbon footprint per kilogram of aluminum from the global industry average of 16.5 kg CO₂e down to under 4.2 kg CO₂e.
Rising job-site labor costs in target markets have accelerated the demand for factory-assembled, fully glazed fenestration units. Doorreme has optimized its production lines to supply modular Crittall-style assemblies pre-fitted with German Roto or Sobinco multi-point locking hardware, factory-sealed gaskets (EPDM weather stripping), and pre-adjusted hinge systems. This modular methodology slashes job-site installation time by up to 60% and eliminates on-site alignment errors.
Modern luxury residential and hospitality projects increasingly require Crittall-style partitioning that offers spatial flexibility. We integrate dynamic Switchable Polymer Dispersed Liquid Crystal (PDLC) privacy glass directly within double-glazed Crittall profiles. At the touch of a button or via smart home automation, the glass transitions from crystal-clear transparency to opaque privacy in under 100 milliseconds while maintaining an STC sound attenuation rating of 42 dB.
The defining visual characteristic of the Crittall-style door is the internal grid line, historically called the muntin bar. In modern architectural aluminum manufacturing, three distinct glazing bar methodologies are employed depending on structural, budget, and performance requirements:
Send us your architectural elevations or rough opening schedule. Doorreme's senior engineering team will provide free structural calculation reports, U-value modeling, and shop drawings within 24 hours.
Contact UsFounded in 2004 in Nanhai District, Foshan—the world-renowned epicenter of aluminum profile manufacturing—Doorreme Aluminum Industry Co., Ltd. has grown over two decades into an elite Tier-1 global exporter of architectural windows, doors, curtain walls, and glass railings.
Partner directly with Foshan’s top architectural aluminum factory. Get uncompromised quality, competitive factory pricing, and full engineering support for your upcoming projects.
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