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Cork Underlayment - 1/4" (6mm) - 150 sq.ft. box

Made in PortugalCork Underlayment6mm (1/4")

$1.09 per sq.ft. ~~$1.39~~ Save 22%$163.50 covers up to 150 sq.ft.

$163.50 per box ~~$208.50~~ · one box covers up to 150.00 sq. ft.

Half price with a flooring order of 100 sq ft or more, free from 300 sq ft.Promotional accessories can change free-shipping eligibility. Delivery options update with your cart.

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Description

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):

Condo or strata? Download the Condo & Strata Acoustic Approval Kit — per-thickness test statements, assembly ratings, certificates, and a cover-letter template your council can file.

warm cork underlay

Info & Guides

Additional information

Board Thickness	6mm (1/4")
Board Length	915mm (36 Inch)
Board Width	610mm (24 Inch)
Core Type	Cork
Impact Noise Reduction	IIC 50 / STC 51
IIC	IIC 50 (on 6” concrete without suspended celling)
Brand	Forna
Country of origin	Portugal
Pieces in Package	25
Country of Origin	Portugal
Weight (packing)	49 lbs
Dimensions (packing)	37 × 25 × 7 in

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Details

Product details

Best use

Kitchen, Bedroom, Living room, Basement. Keep cork out of standing-water conditions and use mats at exterior doors and heavy splash zones.

Box specs

Install: Project dependent
Coverage: 150 sq. ft. per box
Pieces: 25

Install and care

Acclimate cartons, inspect planks, leave expansion space, and follow the click-lock installation guide.

Sweep or vacuum grit, damp mop with cork-safe cleaner, and protect chair legs with felt pads.

Warranty details are listed in the product specifications.

Shipping and returns

Most in-stock orders ship within two business days. Shipping cost and delivery options are calculated during checkout.

Returns are coordinated through the service team, with return shipping handled under the published policy.

Shipping help Return policy

Choose 6mm cork underlayment before buying

6mm cork underlayment is a 1/4 inch acoustic and thermal underlay for balanced acoustic support, finished floor height control, condos, bedrooms, offices, renovations, and everyday underlay projects. Compare thickness, subfloor needs, finished height, and room sound goals before ordering full boxes.

Confirm the full floor assembly before underlayment checkout

Direct underlayment shoppers need the finished floor approval, sample feel, acoustic target, finished height, moisture limits, and project support checked before they order boxes.

Sample cork thickness and density first Check material density, thickness, finished height, and feel before choosing full underlayment boxes. Finished floor approval path Confirm hardwood, laminate, vinyl, tile, or cork flooring instructions allow the selected underlay layer. Acoustic target and finished height Match 3mm, 6mm, or 12mm cork to sound goals, door clearance, transitions, and subfloor conditions. Ask before buying underlayment Send floor type, subfloor, moisture concerns, height limits, acoustic target, and project timing for help.

Match 6mm cork underlayment to the finished floor

Under hardwood and engineered wood Confirm the finished floor manufacturer allows cork underlay, then match thickness to height, sound, and subfloor needs. Under laminate, vinyl, tile or cork Check installation instructions, adhesive or floating system rules, moisture limits, and finished height before ordering. Compare 3mm, 6mm and 12mm cork underlay Choose low-profile, balanced acoustic, or maximum impact-sound support before buying full boxes. Shop cork underlayment Compare 3mm, 6mm, and 12mm cork underlay by sound goal, floor type, and finished height. Order underlayment samples Check thickness, density, finished height, and project fit before buying full boxes. Ask an underlayment specialist Get help matching cork underlay to hardwood, laminate, vinyl, tile, cork, and acoustic requirements.

Product buying questions

What is 6mm cork underlayment best for?

6mm cork underlayment is an acoustic and thermal underlay for flooring projects where balanced acoustic support, finished floor height control, condos, bedrooms, offices, renovations, and everyday underlay projects matter under hardwood, laminate, vinyl, tile, or cork floors.

Should I choose 6mm cork underlayment for sound control?

Cork underlayment can help with impact sound and thermal comfort, but the right thickness depends on assembly, finished floor height, subfloor, building requirements, and the flooring manufacturer instructions.

Can 6mm cork underlayment go under hardwood, laminate, vinyl, tile, or cork?

Often yes, when the flooring manufacturer allows an underlay layer and the substrate, adhesive or floating-floor system, moisture limits, and finished height are confirmed before installation.