Selecting the right insulation for reducing sound transfer between floors involves evaluating material density, installation ease, and long-term performance. This article highlights five top products commonly used for floor-to-floor soundproofing, with a practical buying guide to help you compare options for homes and small studios.
Summary of Selected Products
- Trademark Soundproofing Mass Loaded Vinyl 1lb – MLV: Proven 27 STC, dense 1/8″ vinyl, versatile for walls, floors, ceilings.
- KNEELISA 118” Wedge-Shape Foam Window Weather Stripping: Gap-sealing door/window insulation, broad compatibility.
- Nkiy Quen 1 Pack Felt Insulation Blanket: Multi-purpose, cuttable, great for pipes, walls, floors.
- INSULATION MARKETPLACE SmartSHIELD: Reflective foil with foam core, acts as radiant and sound barrier.
- Floorlot GoldMax Floor Underlayment: 3mm thick underlayment with moisture barrier for floors.
Trademark Soundproofing Mass Loaded Vinyl For Floors
Mass Loaded Vinyl (MLV) remains a staple for floor-to-floor soundproofing due to its high density and flexible application. The Trademark Soundproofing MLV provides a 27 STC rating in a 1/8 inch thickness, offering a dense barrier that reduces impact and airborne sounds from adjacent spaces. It is a non-toxic, odorless material made from virgin constituents and designed for walls, floors, and ceilings. Typical installation involves cutting to size and applying with adhesive or mechanical fasteners beneath subfloors or over existing assemblies. This product is suited for retrofit projects where maximizing sound dampening without excessive thickness matters.
Key considerations:
– Sound barrier performance is strong for impact noise as well as airborne sounds.
– The 1 lb per square foot density delivers substantial mass without extreme bulk.
– Compatibility with various subfloor materials relies on proper installation and seam sealing.
Applications: ideal for multi-story homes, home theatres, and apartments seeking a robust barrier against footfalls, furniture movements, and general inter-floor noise. For best results, pair with resilient channels or decoupled floor assemblies where feasible, and ensure airtight seams to prevent flanking sound.
KNEELISA 118” Wedge Foam Window Sealing For Doors
While primarily marketed for window and door drafts, wedge-shaped foam insulation can significantly reduce sound transmission through gaps at floor-perimeter thresholds, stairwell doors, and other openings connecting different living levels. The KNEELISA product uses a durable nylon cloth exterior with PU foam interior, offering a range of thicknesses to accommodate various gap sizes. By filling cracks at door sills, frames, and window sashes, this seal helps minimize airborne noise that can travel through hallways and into rooms above or below. It is compatible with many door and window materials, including wood, glass, and metal, making it a flexible choice for retrofits and new installations alike.
Key considerations:
– Wedge design supports easy compression and effective sealing across uneven gaps.
– Material combination provides durability and smoother operation of doors without sticking.
– Best used as a complement to mass-loaded barriers for holistic floor-to-floor sound control.
Nkiy Quen Multi-Purpose Felt Insulation Blanket
The Nkiy Quen felt insulation blanket is designed for versatility, offering a blend of insulation, noise reduction, and heat retention in a single, cuttable layer. At 8 feet by 1.3 feet and 0.2 inches thick, it can wrap or line sections of walls, floors, and pipes to dampen sound transmission between levels. Its safe, felt composition is suitable for indoor use and can be applied to walls, pipes, or floor substrates to reduce impact noise from foot traffic or mechanical vibrations. While not a stand-alone flooring underlayment, it serves effectively as an added layer within a layered floor system or HVAC conduit runs to mitigate noise leakage between floors.
Key considerations:
– Flexible, cuttable, and suitable for multiple applications beyond flooring.
– Works best when combined with rigid barriers for structural decoupling.
– Size and thickness offer practical coverage for typical renovation projects.
INSULATION MARKETPLACE SmartSHIELD Reflective Barrier
SmartSHIELD combines a 3mm reflective foam core with a foil radiant barrier, delivering a dual function: radiant energy reflection and sound dampening. This product serves as a lightweight, versatile option for floors where mass is limited or when combined with other barriers to improve overall performance. The foil layer provides vapor protection, and the foam core helps reduce sound energy by absorbing a portion of incident waves. This material is well-suited for retrofits where space is constrained but some wind-down of noise is still desirable, such as in home theatres or multi-use rooms adjacent to living spaces.
Key considerations:
– Excellent radiant barrier properties complement sound dampening.
– Lightweight and easy to install over existing subfloors or underlayment.
– Works best as part of a layered approach rather than a sole solution.
Floorlot GoldMax Floor Underlayment
Floorlot GoldMax is a floor underlayment designed to cushion and separate the upper floor surface from the subfloor, dampening both impact and airborne noise. The 3mm thickness provides a balanced combination of mass and flexibility, while the built-in moisture barrier helps shield floors from subfloor moisture issues. This product is suitable for laminate, engineered wood, and hardwood installations, and it is a practical choice for new floor constructions or renovations where quietness between levels is a priority. Proper installation involves rolling out the underlayment with alignment to room dimensions and ensuring seamless edges to limit sound flanking.
Key considerations:
– Good moisture protection reduces long-term floor damage and squeaks.
– 3mm thickness provides a favorable balance of comfort and mass.
– Best used as part of a full flooring system with a sound-damping layering strategy.
Buying Guide: How To Choose Between-Floor Soundproofing
To optimize sound control between floors, consider these factors and how they interact with each other:
- Material mass and density: Heavier materials, such as mass-loaded vinyl, block more sound energy, especially low-frequency impact noise. Dense systems work best when combined with decoupled structures to minimize flanking paths.
- Installation compatibility: Assess whether your subfloor allows for additional layers, and whether adhesive, mechanical fasteners, or boundary seals are practical for your space. Some products require professional installation for optimal performance.
- Layered approach: In most cases, a combination of barriers (MLV or reflective foil), a sealant or gasket system at openings, and a quality underlayment provides the most balanced soundproofing result.
- Moisture and humidity: Floors must resist moisture. Underlayments with moisture barriers or moisture-resistant materials help protect flooring and reduce sound transmission through damp substrates.
- Budget and space: Heavier mass barriers may require more space and budget, so plan for a layered solution that fits the room’s dimensions and structural constraints.
Comparative considerations:
– For high-traffic, multi-story homes, combining MLV with a resilient underlayment can significantly reduce impact noises.
– If space is limited, lightweight reflective barriers paired with foam sealants can provide a practical improvement without excessive thickness.
– For retrofits, gap sealing around doors and windows is often a quick win that complements other floor-specific barriers.
In short, selecting the best solution involves balancing mass, installation practicality, and how the products interact within your existing floor structure. The five products above offer a range of approaches—from dense mass barriers to flexible sealants and underlayment—allowing you to tailor a soundproofing strategy for between-floor noise.