How to Choose the best soundproofing material for interior walls manufacturer and supplier ?

How to Choose the Best Soundproofing Material for Interior Walls

Introduction - Why choosing the right material matters

Selecting the best soundproofing material for interior walls is a commercial decision and a technical one. Property owners, contractors, and specifiers search for reliable solutions that balance cost, performance, buildability, and regulatory requirements. As a global manufacturer and supplier, ASLONG (Welllink Guangdong New Material Co., Ltd.) has developed solutions used across construction, automotive, and entertainment industries since 2000. This article explains how to evaluate materials, compares leading options, and offers installation and procurement guidance to help you choose the optimal product for your project.

Understand the noise problem — airborne vs impact

Diagnose the source of noise before specifying materials

Start by identifying the type of noise. Airborne noise (voices, TV, traffic) requires mass and absorption. Impact noise (footsteps, dropped objects) requires isolation and decoupling. Choosing the best soundproofing material for interior walls depends on whether you need to block airborne transmission, reduce reverberation, or decouple structure-borne vibrations.

Key acoustic metrics to guide your selection

Use STC, NRC, and IIC scores to compare products

Common performance metrics are:

• STC (Sound Transmission Class) — higher is better for blocking airborne sound. Typical interior partition STC: 30-35 for single stud drywall, 45+ for treated walls. Target STC 50+ for high privacy.
• NRC (Noise Reduction Coefficient) — absorption rating from 0 to 1 used for reverberation control. Higher NRC reduces room echo.
• IIC (Impact Insulation Class) — used for floor/ceiling impact noise; relevant if wall assemblies connect to floor systems.

Common soundproofing materials and performance comparison

Compare products based on real-world variables

Below is a practical comparison of commonly used materials when specifying the best soundproofing material for interior walls.

Notes: Improvements are assembly-dependent and assume proper sealing and framing. Combining mass, absorption, and decoupling typically produces the best results.

How to choose by room type — practical recommendations

Match products to the intended use of the room

Bedrooms and apartments - privacy is priority

For bedrooms and multi-family units aim for STC 50+. A common practical assembly: staggered or double stud wall + 100 mm mineral wool + 2 layers of gypsum + damping compound or MLV layer. This combination addresses airborne noise and helps prevent flanking.

Home theaters and studios - low-frequency control matters

Home theaters need better low-frequency performance. Use additional mass (MLV), double-stud construction, thicker drywall, and acoustic insulation in cavities. Bass traps and room treatment can address in-room response; for walls, focus on mass and decoupling.

Offices and commercial partitions - balance cost and performance

For offices, a practical approach is 50–75 mm mineral wool in cavity + resilient channels + single or double gypsum. If higher privacy is required, add a layer of MLV or damping compound. Consider fire and building code requirements for commercial spaces.

Installation principles and common pitfalls

Performance requires correct installation — not just product selection

Seal flanking paths and airtightness

Even the best soundproofing material for interior walls will fail if edges, sockets, and penetrations are not sealed. Use acoustic sealant on perimeter joints and around electrical boxes. Flanking through ceilings, floors, and ductwork is a common cause of poor results.

Decouple and add mass strategically

Decoupling (resilient channels, clips, double studs) prevents structure-borne vibrations from transferring directly. Follow manufacturers' spacing and screw patterns — improper fastening can short-circuit the decoupling effect.

Use layered systems to target different frequencies

Mass handles low frequencies; absorption handles mid/high; damping reduces panel resonance. Layering materials (e.g., mineral wool + gypsum + MLV) addresses a broader frequency range than single-material approaches.

Cost considerations and ROI for manufacturers and suppliers

Balance budget, performance, and installation complexity

Cost varies widely by region, material density, and labor. Lightweight absorbers are inexpensive but offer limited blocking. Heavy materials like high-density MLV are costlier but can add significant STC gains when integrated with proper construction methods. For manufacturers and suppliers, offering bundled solutions (material + installation guidelines + technical support) improves project success and customer satisfaction.

Why choose a reliable manufacturer-supplier partner like ASLONG

Manufacturing scale, R&D, and global supply matter

ASLONG (Welllink Guangdong New Material Co., Ltd.), founded in 2000, operates a modern production base of more than 10,000 m². With expertise in acoustic materials, sound insulation, and shock-absorbing products, ASLONG supplies MLV, butyl rubber damping mats, NBR foam, sound white cotton, tire silent foam, butyl waterproof tape, and electric auxiliary materials. For contractors and specifiers seeking the best soundproofing material for interior walls, choosing a supplier that provides performance data, installation guidance, and global logistics reduces risk.

Product strengths and export footprint

ASLONG's products have been exported to Europe, North America, Asia, and Africa. The company emphasizes eco-friendly production and provides performance documentation to meet building code and project specifications. ASLONG is recruiting agents worldwide to expand local availability and technical support.

Practical specification checklist for buyers

Ensure project success by verifying these items before purchase

• Required STC, NRC, or IIC target based on room function.
• Material datasheets showing density, fire rating, and tested STC improvements.
• Installation details from the manufacturer, including fastener patterns and sealing instructions.
• Warranty, lead times, and logistics for on-site delivery.
• Compliance with local fire and building codes.

Conclusion

Choose by problem, not by product name

Determining the best soundproofing material for interior walls starts with a clear diagnosis: airborne versus impact noise, frequency range of concern, and project constraints like budget and code requirements. Combine mass (MLV, extra gypsum), absorption (mineral wool, sound white cotton), and decoupling (resilient channels, clips) for the most reliable results. Work with an experienced manufacturer-supplier such as ASLONG to access tested materials, installation guidance, and global logistics. Correct product selection plus proper installation delivers measurable performance and long-term value.

Contact ASLONG

For product specifications, datasheets, and project support — including partnership and agency opportunities — contact ASLONG's technical sales team to help you select the best soundproofing material for interior walls for your project.

Sources and references

• ASTM E413 — Classification for Rating Sound Insulation (general STC definition)
• ASTM E90 — Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions
• World Health Organization — Environmental Noise Guidelines for the European Region (2018)
• United States Environmental Protection Agency — Noise: A Health Problem (EPA)
• Acoustical Society of America — Basics of acoustics and building acoustics principles
• Manufacturer technical datasheets for MLV, mineral wool, and damping materials (industry standard product literature)

Frequently Asked Questions

What is the single most effective upgrade to improve wall soundproofing?
Adding mass and sealing flanking paths typically gives the largest immediate improvement. For many retrofit projects, installing Mass Loaded Vinyl (MLV) beneath a new layer of gypsum and sealing all gaps is often the most practical approach.

How much STC improvement can I expect by adding MLV to a standard stud wall?
MLV typically increases overall assembly STC by approximately 5–12 dB depending on the system and installation quality. Exact gains depend on the base wall, cavity fill, and sealing.

Do acoustic foams (like NBR foam) block sound on their own?
No — acoustic foams mainly absorb mid-to-high frequency energy and reduce reverberation; they are not effective as the sole material for blocking airborne sound. Combine foam with mass or decoupling systems for wall partitions that need blocking performance.

Is mineral wool better than fiberglass for wall soundproofing?
Mineral wool typically has higher density and better acoustic absorption per unit thickness than standard glass fiber batts. It also performs better at mid and low frequencies and offers improved fire resistance, making it a common choice for high-performance partitions.

How important is proper sealing during installation?
Extremely important. Even small gaps, electrical boxes, or unsealed penetrations can reduce the effective STC by several decibels. Use acoustic sealant and follow manufacturer guidance for junctions and penetrations.

Can ASLONG supply project-level documentation and test reports?
Yes. ASLONG provides technical datasheets, test reports for product performance, and installation guides for contractors and specifiers. Contact ASLONG for samples and performance certification to confirm suitability for your project.