Mass-Loaded Vinyl (MLV) Barriers
STC Ratings up to 32.

Mass-loaded vinyl (MLV) is a dense, flexible acoustic barrier material that blocks airborne sound from passing through walls, ceilings, floors, and equipment enclosures. Unlike rigid barriers such as drywall or sheet metal, MLV adds mass in a thin, pliable form that conforms to irregular surfaces. Its high density-to-thickness ratio makes it effective at reducing sound transmission in both new construction and retrofit applications. Memtech Acoustics supplies MLV in reinforced and non-reinforced configurations for commercial, industrial, and architectural noise control projects.

MLV reduces noise by adding mass to a surface, which increases its resistance to sound wave transmission. According to the mass law of acoustics, heavier surfaces transmit less sound energy. A single layer of 1 lb/ft² MLV achieves approximately STC 26, while 2 lb/ft² achieves STC 32. When integrated into a standard wall assembly, MLV can boost the overall STC rating by 5 to 10 points, which represents a significant improvement in perceived noise reduction.

MLV is most effective at reducing airborne sound transmission, including:
- Mechanical equipment noise
- HVAC and duct noise
- Industrial machinery noise
- Speech and office noise
- Music or entertainment noise
- Plumbing noise within walls

Because of its high density, MLV can significantly improve the sound isolation performance of walls, floors, and ceilings.

Yes. One of the most common uses of MLV is within wall assemblies to improve sound isolation. It can be:
- Installed behind drywall
- Weaved between staggered studs
- Attached to studs before drywall installation
- Installed between floor or ceiling layers

This helps prevent sound transmission between adjacent rooms.

MLV performance is determined by density (weight per square foot) rather than thickness. Typical options include:
- 0.5 lb / sq ft: Light residential soundproofing
- 1 lb / sq ft: Walls, ceilings, HVAC noise control
- 1.5–2 lb / sq ft: Industrial equipment or high-performance isolation

Higher density barriers generally provide greater sound blocking performance.

Yes. MLV is designed to be flexible and easy to handle, allowing it to conform to irregular shapes, ducts, and equipment.This flexibility allows it to be used in applications where rigid materials would be difficult to install. MLV can also be cut with a utility knife or shears and installed without specialized tools.

MLV can provide significant sound isolation while adding less thickness than additional drywall layers. Because it is dense and flexible, it can be used where adding multiple layers of drywall or concrete would be impractical or structurally difficult.

MLV pricing varies based on density, roll size, and whether the product is reinforced or non-reinforced. Generally, 1 lb/ft² non-reinforced MLV is the most economical option, while 2 lb/ft² reinforced barrier carries a premium due to its added strength and higher noise reduction performance. Memtech Acoustics provides project-specific quotes that account for your required coverage area, density specification, and any custom fabrication. Contact our team for current pricing and volume availability.

MLV installation depends on the application. For walls, it is typically stapled or screwed to studs before drywall is applied, with seams overlapped by at least 2 inches and sealed with acoustic caulk to prevent sound flanking. For ceilings and floors, MLV is laid flat between structural layers. For equipment enclosures and ductwork, it is wrapped and secured with mechanical fasteners or adhesive. Memtech Acoustics provides downloadable installation guides and can coordinate professional installation in select regions.

Many MLV products meet Class A fire ratings per ASTM E84 testing, making them suitable for use in code-driven environments such as commercial buildings, healthcare facilities, and educational institutions. Memtech Acoustics supplies MLV products that comply with IBC, NFPA 80, and NFPA 285 requirements. Fire rating documentation and test reports are available upon request for specification and permitting purposes.