Cork Underlayment – 6mm (1/4″) – 150 sq.ft.

6mm Cork Underlayment Overview

Our 6mm cork underlayment delivers reliable comfort and performance, helping floors feel naturally warmer by reflecting body heat back into the room. Positioned as the mid-range option in thickness, it offers a strong balance between sound absorption and thermal protection.

Each panel comes in its natural cork state, precisely cut to 2ft x 3ft (24” x 36”) and neatly packed 25 pieces per box. A single carton provides coverage for about 150 square feet and weighs approximately 44 lbs.

Made from 100% pure agglomerated cork, this product contains no formaldehyde or harmful toxins. The water-based binders further enhance its eco-friendly profile. From harvesting cork bark in Portugal to the final product, every stage is designed with sustainability and durability in mind.

Advantages & Features

Sound Control – Cork’s honeycomb-like structure (about 40 million cells per cm³) naturally reduces impact and airborne noise, enhancing acoustic comfort.

Resilient Cushioning – Provides elasticity and support, protecting floors above while creating a softer surface to walk on.

Moisture Protection – Natural suberin (a wax found in cork) offers resistance to mold, mildew, and microbial growth.

Thermal Efficiency – Creates a barrier against cold subfloors, helping maintain indoor warmth and improving the efficiency of radiant heating systems.

This versatile underlayment works beneath hardwood, engineered wood, bamboo, cork floating floors, laminates, and tile, ensuring improved floor performance and greater home comfort.

An Eco-Responsible Choice

Cork is a naturally renewable resource, harvested without damaging the tree itself. A cork oak can live up to 200 years and be harvested around 15 times, making this underlayment both sustainable and environmentally responsible. Choosing cork supports thriving forests and reduces reliance on synthetic alternatives.

Product Specifications

• Material: 100% Agglomerated Cork

• Thickness: 6mm (¼”)

• Panel Size: 24” x 36” (2ft x 3ft)

• Density: 220kg/m³ ±10%

• Coverage: 150 sq. ft. per carton (25 sheets)

• Weight: 44 lbs per carton

• Country of Origin: Portugal

• Certifications: MSDS, Resin Compliance

Acoustic Ratings (Field Tests):

• IIC 50 (6” concrete, no ceiling)

• IIC 64 (6” concrete, suspended ceiling)

• STC 51 (6” concrete, no ceiling)

• STC 65 (6” concrete, suspended ceiling)

Info & Guides

• MSDS
• Resin Statement
• Product Information