High-performance acoustic interior and exterior door assemblies engineered for architectural specifications.
As an industry-leading manufacturer and global exporter, Zhejiang Larsom Door Co., Ltd. specializes in the extensive research, design engineering, and execution of high-performance security doors, armored systems, steel-wood architectural configurations, and tailor-made acoustic entrance solutions.
By integrating structural sound attenuation technology with high-grade visual aesthetics, we help developers, contractors, and acoustic engineers solve complex noise intrusion challenges. From multi-family residences to executive office suites and government buildings, we design and ship soundproof barriers that comply with international building codes.
Larsom Corporate Manufacturing Headquarters
Under the hood of Larsom Door’s premium noise isolation mechanisms. Discover how we hit STC ratings up to 45dB+.
We combine rock wool insulation, viscoelastic sound-damping sheets, and internal steel reinforcement webs. This asymmetric design eliminates resonance frequencies and dampens sound transmission across key decibel spectra (125Hz to 4000Hz).
Equipped with dual and triple-recessed EPDM bubble gaskets. These high-density perimeter seals eliminate sound flanking paths between the frame and door leaf, achieving a clean seal that does not degrade under heavy cycle wear.
To eliminate bottom-gap acoustic leaks, our designs incorporate integrated automatic drop-down seals. As the door closes, a plunger activates a heavy-duty silicone seal that meets the floor, ensuring target STC ratings are maintained.
Our door assemblies are system-tested: STC 28-32dB is recommended for standard offices and meeting spaces; STC 35-40dB is ideal for corporate boardrooms and shared office partition walls; and STC 42-45dB+ is engineered for executive suites, private clinics, and media recording spaces.
Standardizing high-performance sound isolation door hardware layouts across global commercial construction sectors.
Preserves executive confidentiality and blocks workspace cross-talk, keeping open-plan office noise outside boardrooms. Fully supports electronic drop-seal components and keyless card access integrations.
Protects patient privacy in consultation zones in compliance with international privacy laws. Features antibacterial PVC/veneer laminates and structural draft-proof gaskets.
Provides peace and comfort for occupants. Combines up to 60 minutes of certified fire resistance with high acoustic decibel attenuation (STC 38+), matching global multi-family residential building codes.
Inside our 16,000 square meter facility. How Zhejiang Larsom Door Co., Ltd. blends automation with rigid quality control.
To deliver on high-volume custom commercial orders without compromising structural tolerances, we have invested heavily in automated precision engineering. Our factory floor utilizes CNC laser cutting machines, high-speed turret punch presses, automated plate bending lines, and robotic welding setups. These technologies guarantee micro-level precision across every door assembly we manufacture.
We understand the challenges faced by general contractors and purchasing managers: lead times must align with project phases, and quality must be documented.
Through our comprehensive OEM and ODM support, we provide shop drawing reviews, customizable core materials, hardware preparation (pre-machined mortise slots for hinges and smart locksets), and custom packaging designed to prevent transit damage.
Reviewing decibel (dB) goals, dimensions, fire safety requirements, and local certifications.
Providing precise shop drawings with mortised prep dimensions for engineering sign-off.
Implementing CNC cutting, hot pressing, hardware installation, and batch testing.
Securing door panels in reinforced crates to ensure safe delivery to site.
Zhejiang Larsom Door Co., Ltd. exports to over 130 countries, complying with local building and fire safety codes.
Our facilities supply configurations compliant with UL 10B and UL 10C positive pressure fire testing, as well as ASTM E90 acoustic testing specifications.
Compliance with EN 1634 fire ratings and EN ISO 10140-2 laboratory acoustic insulation testing ensures friction-free customs and building sign-offs throughout Europe.
Providing fire-rated core solutions tested under BS 476 Part 22, matching local fire safety mandates across Middle Eastern and Commonwealth territories.
Detailed answers to technical questions about acoustics, manufacturing tolerances, and sourcing.
Heavy-duty engineered solutions built for high-traffic environments.
Larsom Door
