Explore our elite range of custom engineered cast aluminum and armored entryway systems designed for high-end residential, hotel, and commercial developments.
An authoritative guide to modern architectural entrance systems for developers, specifiers, and procurement professionals.
In high-end architectural design, the entryway serves as the primary barrier against atmospheric degradation and unauthorized access. Traditional steel entryways, while rigid, face severe vulnerabilities in coastal or high-humidity regions, suffering from rapid oxidation (rusting) and surface deterioration. Solid cast aluminum security doors address these engineering challenges through advanced metallurgical formulations. Utilizing premium-grade aluminum alloys, typically A356 or ADC12, these systems display exceptional tensile strength, elevated impact resistance, and inherent corrosion protection.
The casting process enables monolithic structural designs without structural weld seams. Welding seams are common stress-concentration zones that compromise mechanical integrity. Solid cast plates, ranging from 8mm to 15mm in thickness, create an impenetrable barrier that resists mechanical drilling, cutting, and high-energy impacts. Additionally, cast aluminum's natural oxide layer is chemically enhanced through industrial anodization and PVDF (Fluorocarbon) coating technologies, delivering robust protection against harsh ultraviolet (UV) radiation and salt-fog environments.
Architectural specifications require security systems to perform across multiple performance vectors, including thermodynamic structural stability, acoustic dampening, and wind-load resistance.
Engineered to comply with European Standards EN 1627 RC3 and RC4 rating systems, resisting manual attacks utilizing specialized heavy-duty tools for extended periods.
Configured with high-density polyurethane cores, rock wool, and structural thermal breaks to optimize U-Values and deliver Sound Transmission Class (STC) ratings exceeding 42dB.
Features heavy-duty stainless steel 3D adjustable hinges, multi-point active locking systems, and secondary interlocking deadbolts to resist physical leverage attacks.
Zhejiang Larsom Door Co., Ltd. is a premier manufacturer specializing in the research, development, production, and global distribution of high-performance security doors, armored entry systems, steel-wood composites, and customized luxury entrance solutions.
Operating from a state-of-the-art 16,000 square meter production facility with over 160 skilled technicians and engineers, Larsom Door maintains a stable daily production capacity exceeding 200 premium door sets. Our commitment to automated fabrication ensures strict dimensional accuracy, matching the high standards of global developers and custom OEM/ODM clients.
By deploying CNC laser cutting systems, automatic bending machinery, robotic welding, and automated sanding, Larsom Door eliminates structural variation. Our components undergo strict quality control (QC) testing to ensure long-term alignment, structural stability, and surface longevity in global projects.
Every stage of production—from primary metal preparation to final quality inspection—is monitored to maintain structural integrity.
Pressing Plate
Heavy-duty hydraulic press systems shape raw plates under exact pressures to establish core structural profiles.
Material Preparation
High-grade aluminum profiles are systematically calibrated and prepared for precision assembly.
Splicing & Frame Joining
Joints are aligned and secured to eliminate weak points under physical stress.
Edge Sanding
Precision orbital sanders smooth seams, providing clean margins and tight tolerances.
CNC Engraving & Detailing
Advanced multi-axis CNC machines engrave architectural designs directly into the cast panel.
UV Surface Curing
Automated UV curing ovens treat topcoats, enhancing resistance against weather, fading, and scratches.
Plate Shearing
Automated mechanical shears cut metals with sub-millimeter precision, minimizing raw edge waste.
CNC Laser Cutting
High-powered fiber lasers cut lock slots, hinge points, and hardware cutouts directly from digital files.
Plate Bending & Folding
CNC press brakes form door frame structures with uniform angles, ensuring square fits during installation.
Precision Punching
High-speed turret punches pierce lock cylinders and auxiliary systems without causing structural deformation.
Selecting the correct specifications based on geographic exposure, security requirements, and local building codes.
In marine and coastal environments, standard steel doors can show signs of oxidation within months due to airborne salt spray. In these locations, cast aluminum entryways are a preferred choice. The thick cast aluminum panel combined with marine-grade fluorocarbon (PVDF) powder coats acts as a barrier against chemical degradation. Specifying hardware made of 316-grade stainless steel helps prevent galvanic corrosion, ensuring long-term operational integrity.
High-end residential entries require both security and visual appeal. Solid cast aluminum doors can be molded with customized architectural details, offering a premium look. These systems support large-format pivot options with weight capacities up to 600kg, incorporating double-glass panels and biometric access interfaces to balance architectural design and perimeter security.
For commercial structures, institutional facilities, and public buildings, entryways must withstand frequent use. Cast aluminum doors maintain dimensional stability and resist sagging under continuous cycles. Integration with electronic access systems, including electric strikes, maglocks, and automated openers, ensures seamless performance in automated environments.
How our manufacturing location in Zhejiang optimizes production speed, costs, and quality for international projects.
Our facility in Zhejiang sits in a leading global metalworking region, providing direct access to raw aluminum extrusion plants, casting suppliers, and advanced hardware manufacturers, which helps reduce lead times.
Our CAD/CAM processes and mold fabrication partners enable us to move from custom design approval to physical aluminum sample casting in a short timeframe, accelerating project approvals.
Located near major ports like Ningbo and Shanghai, we support various shipping methods (FCL, LCL) with customized packaging solutions, including steel-reinforced crates, to ensure safe transit.
Integrating smart technologies and energy efficiency features while meeting global regulatory standards.
Contemporary building designs increasingly require smart security features. Larsom security systems are engineered to integrate with multi-family smart hubs. Features include dry-contact relays for smart systems, motorized multi-point locks, and in-frame biometric readers. These setups route wiring through concealed armored raceways within the door frame, maintaining security and aesthetics.
To support LEED and low-energy building goals, our doors utilize thermal break chambers that separate the exterior cast aluminum face from the interior section. This design reduces thermal bridge transfer. Filled with closed-cell polyurethane foam and fitted with silicone weather stripping, our systems help limit heat transfer in both cold climates and high-temperature environments.
Clear, technical answers to common queries from architects, structural engineers, and purchasing managers.
Complementing our cast aluminum exterior systems with pivot doors, engineered composite interior doors, and acoustic systems.
Larsom Door