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Cork Underlayment - 1/2" (12mm) - 102 sq.ft. box

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Cork Underlayment - 1/2" (12mm) - 102 sq.ft. box

Made in PortugalCork Underlayment12mm (1/2")

$1.99 per sq.ft. ~~$2.49~~ Save 20%$202.98 covers up to 102 sq.ft.

$202.98 per box ~~$253.98~~ · one box covers up to 102.00 sq. ft.

Half price with a flooring order of 100 sq ft or more, free from 300 sq ft.

Order a Sample

Description

12mm Cork Underlayment – Superior Noise & Temperature Control

Looking for a reliable way to enhance comfort and quiet in your home or building project? Our 12mm thick cork underlay is a high-performance solution designed to deliver excellent sound dampening and thermal insulation. Crafted in Portugal from all-natural cork, these sheets are durable, eco-friendly, and built to last.

Product Highlights:

Material: Pure agglomerated cork
Nominal Thickness: 12mm (½ inch)
Sheet Dimensions: 24″ x 36″ (2 ft x 3 ft)
Carton Coverage: 102 sq. ft. (17 sheets per box)
Carton Weight: Approx. 62.5 lbs
Density: 220 kg/m³ ±10%
Country of Origin: Portugal
Installation: Suitable under engineered wood, hardwood, laminate, cork floating floors, and tile

Acoustic & Thermal Benefits

Cork’s natural honeycomb-like cellular structure is made up of millions of sealed air pockets, creating an effective barrier against both impact and airborne sound. In field tests, our 12mm cork underlayment achieved the following impressive sound ratings:

Test	Without Suspended Ceiling	With Suspended Ceiling
IIC	75	89
STC	76	90

This makes it a fantastic choice for multi-level homes, condos, offices, and anywhere peace and quiet matter.

At the same time, cork acts as a thermal insulator, keeping cold from creeping up through concrete or unheated subfloors. It also works well with radiant floor heating systems by reducing thermal loss, increasing energy efficiency.

Natural, Renewable & Safe

Our underlay is produced from sustainably harvested cork bark—no trees are cut down in the process. It’s bound with non-toxic, water-based adhesives, contains no formaldehyde or VOCs, and is completely recyclable at the end of its life cycle. A cleaner planet starts beneath your feet.

Comfort Under Every Step

Unlike synthetic alternatives, cork provides a cushioned feel underfoot that reduces joint strain and fatigue. It reflects body heat to create a naturally warmer walking surface—perfect for bedrooms, family rooms, and basements.

Where to Use

Under hardwood, engineered wood, and laminate floors
Beneath glue-down or floating cork flooring
Under tile when properly installed with a decoupling membrane
Ideal for high-rise condos, apartment buildings, home theaters, and nurseries

A Smarter Alternative to Foam Underlay

Feature	12mm Cork Underlay	Standard Foam Underlay
Eco-friendly & renewable	Yes	No
Soundproofing performance	Excellent	Limited
Thermal insulation	High	Low
Durable & resilient	Long-lasting	Breaks down over time
Heating system compatible	Great with radiant heat	Not always suitable

The Foundation of a Better Floor

With its outstanding acoustic ratings, insulating properties, and sustainable design, our 12mm cork underlayment is more than just a subfloor—it’s an upgrade to your entire living experience.

warm cork underlay

Acoustical rating results below were generated from field testing:

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.

Info & Guides

Additional information

Board Thickness	12mm (1/2")
Board Length	915mm (36 Inch)
Board Width	610mm (24 Inch)
Core Type	Cork
Impact Noise Reduction	IIC 48 / STC 49
IIC	IIC 48
Brand	Forna
Country of origin	Portugal
Pieces in Package	17
Country of Origin	Portugal
Weight (packing)	70 lbs
Dimensions (packing)	37 × 25 × 9 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: 102 sq. ft. per box
Pieces: 17

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 12mm cork underlayment before buying

12mm cork underlayment is a 1/2 inch acoustic and thermal underlay for maximum impact sound control, thermal support, condos, apartments, studios, and demanding acoustic flooring 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 12mm 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 12mm cork underlayment best for?

12mm cork underlayment is an acoustic and thermal underlay for flooring projects where maximum impact sound control, thermal support, condos, apartments, studios, and demanding acoustic flooring projects matter under hardwood, laminate, vinyl, tile, or cork floors.

Should I choose 12mm 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 12mm 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.