Explore our engineering-first, sound-damped exterior and interior architectural door collections designed for high decibel attenuation.
White paper on structural noise reduction, real estate trends, and regulatory changes globally.
The global demand for high-performance soundproof doors has risen dramatically, driven by the structural shifts toward hybrid and remote work models. Once a niche requirement reserved for commercial recording studios, industrial engine rooms, and luxury hotels, acoustic isolation has now transitioned into a mainstream architectural necessity. Modern residential spaces are increasingly expected to perform dynamically, demanding designated zones of quiet that isolate family life from focused executive activities.
According to acoustic engineering research, exposure to chronic low-level residential noise—ranging from home appliances and HVAC systems to street traffic and internal voice transmission—significantly increases cognitive fatigue and reduces productivity. As a leading manufacturer and exporter, Zhejiang Larsom Door Co., Ltd. is at the forefront of this market shift, engineering door leaf structures and sealing systems that meet stringent Sound Transmission Class (STC) and Weighted Sound Reduction Index (Rw) benchmarks.
Every 3 dB increase represents a doubling of sound energy. Standard lightweight hollow-core interior doors yield an STC rating between 20 and 25, failing to block even normal speech. Premium Larsom acoustic wood and composite doors achieve STC ratings up to 45+, blocking high-frequency telephone rings, loud voices, and external environmental noise. Achieving this degree of soundproofing requires dedicated multi-layer core compositions and perimeter compression gasketing.
Leveraging high-density particleboards, multi-layered mineral wool insulation, and heavy-duty visco-elastic damping sheets to dissipate incoming acoustic energy waves into heat.
Utilizing high-performance magnetic rubber seals and drop-down thresholds that seal automatically upon door closure, eliminating flanking pathways where sound typically leaks.
Combining fire protection with superior acoustics. Our WPC and Solid Core variants provide safety and sound dampening simultaneously, certified to international standards.
Providing custom OEM/ODM solutions engineered to fit varying building codes, moisture levels, and thermal conditions in North America, Europe, and Asia-Pacific.
Global Leader in High-Security & Acoustic Door Manufacturing
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 its establishment, Larsom Door has been committed to providing customers around the world with safe, durable, and stylish door products. Today, the company operates a modern manufacturing facility covering more than 16,000 square meters, supported by an experienced team of over 160 skilled employees. With advanced production management and efficient manufacturing systems, our daily production capacity exceeds 200 sets of premium doors, enabling us to meet both large-scale projects and customized orders with reliable delivery.
To continuously improve product quality and manufacturing efficiency, Larsom Door has invested heavily in advanced automated production equipment, including CNC laser cutting machines, CNC bending machines, automatic welding systems, high-speed turret punching machines, automatic sanding machines, and modern powder coating production lines. These advanced facilities, combined with strict quality control procedures, ensure that every door meets international quality standards.
Quality is the foundation of our business. Larsom Door strictly implements comprehensive quality management throughout every production process, from raw material selection to final inspection. Our products comply with international quality standards and have earned an excellent reputation among customers worldwide.
Today, Larsom Door exports its products to more than 130 countries and regions, including Europe, the Middle East, Africa, South America, Southeast Asia, and Central Asia. Our major customers include building contractors, real estate developers, wholesalers, distributors, and importers. With rich experience in OEM and ODM manufacturing, we provide flexible solutions for customers seeking customized branding and product development.
How we ensure tight tolerances and structural integrity for premium sound insulation and physical security.
High-speed mechanical shearing cuts raw sheets to precise design sizes, avoiding raw edge deformities.
Automated CNC laser cutters shape locksets, hinge recedes, and visual windows down to sub-millimeter tolerances.
CNC press brakes fold panels into clean frame borders, maintaining strict geometry for zero acoustic leakage.
High-speed turret punching machines process internal hardware mounting holes with structural repeatability.
Heavy hydraulic presses laminate internal core layers, preventing delamination and maintaining flatness.
Advanced tongue-and-groove splicing aligns core timbers to reinforce structural acoustic density.
Sanding systems smooth outer profiles, preparing surfaces for paint adhesion and perimeter seals.
Engraving systems cut artistic motifs and custom modern flush designs according to client specifications.
Curing via automated UV coating ensures scratch resistance and low-VOC emissions for interior air safety.
Adapting architectural acoustic solutions to modern lifestyles and regulatory demands.
Building codes in urban epicenters are shifting towards mandatory acoustical ratings between adjacent living units and designated home office zones. For instance, the International Building Code (IBC) requires an STC rating of 50 for multi-family residential walls and doors. By utilizing our composite and armored soundproof configurations, developers can achieve localized compliance without adding heavy partition walls, creating a seamless and premium experience for buyers.
One of the primary challenges in acoustic door design is the trade-off between weight, thickness, and performance. Traditionally, heavy solid oak doors were the default option, but they are prone to warping in high-humidity environments. Our engineering team solves this using multi-density composite layups. We blend lightweight, water-resistant WPC (Wood Plastic Composite) skin layers with heavy density rockwool or polyurethane cores. Additionally, we offer custom engineered veneers and hand-finished bronze, allowing clients to specify doors that deliver luxury aesthetics alongside modern security features.
The modern executive home office is no longer just a desk in the corner. It is a secure communication node. High-profile video calls and sensitive transactions require sound isolation as well as anti-theft security. Larsom integrated smart doors feature biometric face-recognition and digital lock systems alongside our soundproof cores. By combining security and sound dampening, we provide complete privacy and safety for high-stakes remote work.
Addressing the technical, logistics, and material questions of global importers and architects.
Our standard solid core interior doors start at STC 35. For higher specification applications, we manufacture multi-layer composite acoustic panels and armored models that achieve STC 42 to 45 when installed with perimeter neoprene compression seals and automatic drop seals.
Yes. Zhejiang Larsom Door Co., Ltd. is an experienced OEM/ODM provider. We customize dimensions, core materials, veneers, metal coatings, locking systems, and pre-drilled hardware preparations to meet specific architectural project drawings.
Standard hollow doors yield STC 20-25 and sound passes easily. Larsom soundproof doors utilize high-density acoustic cores (density up to 600kg/m³) and tight gasketing, reducing perceived sound levels by up to 80% compared to typical hollow-core panels.
Yes, our WPC (Wood Plastic Composite) and engineered veneer doors are designed to resist humidity and moisture. They do not swell or warp, making them suitable for bedroom, office, or bathroom transitions.
Our manufacturing processes are ISO9001 and CE certified. We can customize products to meet specific regional requirements, such as BS476 fire ratings, UL classifications, or local European soundproofing norms.
With a production area of 16,000+ sqm and automated CNC machines, we produce over 200 sets daily. Typically, custom OEM orders are completed and prepared for export within 25 to 35 days from deposit confirmation and drawing approval.
Select from solid-core wood, armored composite steel, and luxury bronze finished doors for residential and commercial spaces.
Larsom Door
