Acoustic Barrier

Cork rubber underlay is a premium, high-density composite material engineered by blending recycled rubber granules with natural cork bark and a polyurethane binder. This hybrid combination blends the exceptional structural resilience and moisture resistance of rubber with the superior mid-frequency noise damping and thermal insulation of cork. It serves as a durable, heavy-duty foundation typically installed under engineered wood, laminate, luxury vinyl tiles (LVT), and ceramic tile flooring to significantly reduce impact noise (like footsteps) between building levels. Core Benefits and Performance Specifications

• Acoustic Insulation: Delivers powerful impact sound reduction ranging from 18 dB 
• The rubber absorbs heavy mechanical vibrations, while the open-cell cork structure scatters sound waves in the 1,000–3,150 Hz range (the most annoying frequencies to human ears).
• Maximum Compressive Strength: Unlike basic foam underlays that flatten under load, cork-rubber has a high density (roughly 500 to 640 kg/m³). It retains its elasticity and shape over decades, protecting floor locking mechanisms from breaking under heavy furniture or foot traffic. 
• Subfloor Smoothing: Its flexible structural composition easily accommodates tiny screed irregularities, grit, or minor subfloor imperfections.
• Thermal Efficiency: Provides balanced heat retention (with standard ratings around 0.075 k/w m² or 0.75 Tog). While it stops cold from seeping up through concrete, you must verify the specific brand's compatibility if you plan to use it alongside underfloor heating.