Discover our heavy-duty, performance-tested architectural doors designed for modern security, fire prevention, and premium sound damping.
Architectural-Grade Security & Custom Entrance Solutions
Zhejiang Larsom Door Co., Ltd. is a professional manufacturer specializing in the research, development, production, and global sales of high-quality security doors, armored doors, steel-wood doors, and customized entrance door solutions. Since our inception, we have been committed to providing global developers, contractors, and hospitality projects with robust, high-performance acoustic and structural security doors.
Operating out of a modern manufacturing facility covering more than 16,000 square meters and supported by a team of over 160 skilled employees, our daily production capacity exceeds 200 sets of premium doors. This structural capacity ensures we can meet large-scale commercial contracts and custom bespoke architectural specifications with reliable, on-time delivery across global markets.
Understanding acoustic criteria across diverse international regions is critical to executing flawless architectural projects.
North American buyers focus heavily on the Sound Transmission Class (STC) metric under ASTM E90 standardizations. In luxury multi-family housing and office spaces, requirements specify a minimum of STC 35 to 45. In executive boardrooms and recording environments, strict compliance dictates STC 50+ to obtain LEED and WELL building certifications.
Under BS EN ISO 10140 standards, the Weighted Sound Reduction Index (Rw) is the benchmark metric. Soundproof doors destined for the EU must prove decoupling capacity to meet CE markings. European hotel developers look for high-performance acoustic cores combined with EI30 or EI60 fire protection ratings to satisfy strict localized building codes.
In the Gulf region, mega commercial and hospitality builds emphasize acoustic isolation alongside thermal performance. Exterior entry doors must resist thermal movement while interior guest room doors require excellent sound damping properties (typically STC 40+) coupled with high-end timber veneers (such as white oak or American walnut).
Custom engineering solutions designed to mitigate noise transmission, maintain thermal control, and fit bespoke project demands.
With the rise of open-plan layouts, maintaining private conference zones and phone booths is essential. Larsom Door provides engineered acoustic flush wooden doors outfitted with structural metal drop seals and premium concealed magnetic latches to eliminate flanking paths.
In high-end hotels, guest sleep quality is directly tied to the hallway noise isolation performance. Our specialized hospitality entry systems provide a minimum noise reduction rating of 38dB to 45dB, while incorporating crucial fire safety configurations.
Every acoustic door at Zhejiang Larsom Door is manufactured using cutting-edge CNC equipment, precise raw material layering, and multi-stage testing.
Precision fabrication guarantees perfect frame-to-door alignment, eliminating air gaps that leak acoustic energy.
Heavy-duty bending ensures the structural integrity of steel frames supporting heavy acoustic multi-layered door slabs.
Automated punching for locks, hinges, and drop seals maintains design specifications down to tenths of a millimeter.
Clean raw sheet shearing sets the high dimensional precision standards needed for subsequent acoustic assembly.
Uniform high-pressure bonding fuses dense acoustic core layers, dampening polymers, and structural outer veneers.
Specialist joining processes prevent dimensional warping from moisture or thermal changes, protecting the acoustic seals.
Minimizes internal core air pockets to block transmission paths for sound waves moving through the door slab.
Perfect smoothing of raw edges ensures a tight, continuous contact interface for perimeter rubber gasket seals.
Adds custom aesthetics and groove details without compromising the thickness of the acoustic barrier.
Applies hard, environmentally-stable protective coatings that resist scratches and cleaning chemicals.
How we achieve high decibel isolation ratings without sacrificing the structural thickness or aesthetic profile of timber.
Ordinary solid wood doors permit low-frequency sound energy to pass through. Our specialized core sandwiches a high-density visco-elastic sound-damping compound between solid timber, mineral board, and multi-layer MDF sheets, breaking up sound vibrations dynamically.
Sound leaks where air leaks. We use continuous neoprene or silicone perimeter gasket systems combined with intumescent fire seals that expand when exposed to heat, blocking fire, smoke, and noise simultaneously.
The bottom of the door slab presents a significant sound leakage risk. Our heavy-duty mechanical drop seals actuate automatically when the door is closed, sealing firmly against the threshold to stop sound and drafts.
Every step of our process, from sourcing premium materials to shipping, is audited for compliance with global standards.
We implement comprehensive quality control throughout every step of production. By using CNC automated laser cutting, bending, and specialized sanders, we manufacture products that maintain stable dimensional properties under varying moisture conditions.
All raw timber materials are sourced from sustainably managed woodlands. Each batch is kiln-dried and conditioned in climate chambers before processing, stabilizing the wood and preventing warping, cracking, or loss of acoustic seal contact.
Today, Zhejiang Larsom Door Co., Ltd. exports high-performance products to more than 130 countries and regions across Europe, the Middle East, Africa, South America, and Asia. Our professional engineering and sales teams offer complete technical drawings, Revit/BIM files, and detailed acoustic certificates to smooth your approval processes.
Equipped with high-performance CNC machining lines and automatic UV painting systems.
Dedicated support for customized sizing, veneer finishes, fire requirements, and hardware integration.
Our designs undergo testing to satisfy strict global fire containment and sound insulation standards.
Answers to technical and commercial questions most frequently asked by global procurement teams and acoustic consultants.
Explore our architectural steel and armor door selections, designed to protect luxury homes, schools, and commercial facilities.
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