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Cork Underlayment – 1/2″ (12Mm) – 102 Sq.ft.

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

Name: 12mm Cork Underlayment USA | 102 Sq Ft Acoustic Underlay
Brand: Forna
SKU: FUnd12
Price: 151.98 USD
Availability: BackOrder
Rating: 5 (1 reviews)

Made in PortugalCork Underlayment12mm (1/2 Inch)

Rated 5 out of 5 based on 1 customer rating

(1 customer review)

Original price was: $202.98.Current price is: $151.98.

Price: ~~$202.98~~ $151.98 / box (Save: $51.00)
_{One box covers up to 102.00 sq. ft.}

Summer Project SaleSale ends in 26 daysSale pricing ends August 5 at 11 PM PT.

When it comes to soundproofing between floors, nothing performs better than cork.

LIMITED PROMO: This product does not qualify for volume discounts.

Estimated restock: late July 2026

Order now to reserve from the next shipment. Dates are estimates and may shift.

Order a Sample

Bundle and save: buy 2 or more accessories (trim, underlayment, adhesive, finish) and an extra 10% comes off those items automatically in the cart.

Free shipping over $3,500

In stock. Most orders ship within 2 business days.
Up to 90 days returns on unused product
Pay over time with Affirm, Afterpay or Klarna. Options shown at checkout.

Description

12mm Cork Underlayment – Premium Acoustic & Thermal Barrier

When it comes to soundproofing between floors, nothing performs better than cork. Our thickest and most effective acoustic solution—12mm (1/2″) Cork Underlayment—is now available in durable, pre-cut sheets, ready to elevate your flooring installation.

✅ Key Features:

100% Agglomerated Cork
Density: 220 kg/m³ ±10%
Thickness: 12mm (nominal ½”)
Sheet Size: 2 ft x 3 ft (24” x 36”)
Square Feet per Carton: 102 sq. ft.
Weight per Carton: 62.5 lbs
Source Country: Portugal
MSDS Available
Natural Cork Sheets: 24” x 36” x ½”
Acoustic and Thermal Underlayment for tile, laminate, and floated or glue-down wood floors
Compatible With: Engineered hardwood, hardwood, laminate, cork floating floors
Reduces Thermal Transmission, improving underfloor heating system efficiency

Certified Acoustic Performance (Field-Tested Results):

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

IIC (Impact Insulation Class): Measures impact noise like footsteps
STC (Sound Transmission Class): Measures airborne noise like voices and TV

Naturally Sustainable & Eco-Conscious

Harvested from the outer bark of cork oak trees—without cutting them down—our cork is a renewable, recyclable material bound with non-toxic, water-based adhesives. It’s formaldehyde-free and environmentally friendly from start to finish.

Thermal Insulation + Warmth Retention

Unlike foam or synthetic alternatives, cork resists cold transfer from concrete subfloors and retains warmth—helping maintain comfortable room temperatures and lower heating costs.

Comfort You Can Feel

Cork underlay cushions every step, making it an ideal choice for bedrooms, family rooms, and upper-level installations. Its natural resilience adds softness while protecting your finished floor above.

Packaged for Performance

Format: Pre-cut sturdy sheets
Packaging: 17 sheets per carton
Installation: Easy to handle, cut, and install beneath most flooring systems

Cork vs Foam Underlay

Feature	12mm Cork Underlay	Typical Foam Underlay
Natural & recyclable	Yes	No
Thermal insulation	Excellent	Minimal
Sound reduction	Up to 48 dB	Lower performance
Floor heating compatibility	Yes	Not always compatible
Formaldehyde-free	Yes	Often not

Quiet. Warm. Green.

Whether you’re soundproofing a bedroom, insulating a basement floor, or adding comfort under luxury vinyl planks or hardwood, our 12mm cork underlayment provides superior performance backed by nature.

Discover the unmatched comfort, acoustic control, and sustainability of cork—straight from Portugal.

Acoustic Insulation Cork Unerlayment Bedroom Sound Proof Underlay Copy

Warm Cork Underlay

More Details
Acoustical rating results below were generated from field testing:

Info & Guides

Additional information

Board Thickness	12mm (1/2 Inch)
Board Length	915mm (36 Inch)
Board Width	610mm (24 Inch)
Core Type	Cork
Brand	Forna
Country of Origin	Portugal
Pieces in Package	17
Weight (packing)	70 lbs
Dimensions (packing)	37 × 25 × 9 in

Reviews (1)

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

Rated 5 out of 5

Dan Whiting – March 11, 2018

We were trying to determine whether the cork or rubber would be a better noise reducer. The “rubbery” smell that you worried about because I have a breathing problem. Rubber can give off a “rubbery” smell when it warms up (like direct sunlight). We have chosen to go cork flooring with 12mm cork underlay. The room became very quiet.

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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.

Should I order a 12mm cork underlayment sample first?

iCorkfloor recommends samples so buyers can compare thickness, density, finished height, feel, and project fit before ordering full underlayment boxes.

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