-20%
Cork Underlayment - 1/2&Quot; (12Mm) - 102 Sq.ft. Box
Acoustic Insulation Cork Unerlayment Bedroom Sound Proof Underlay Copy
12Mm Cork Underlayment Sample
Floating Floor Underlayment Cork 12Mm
Floating Floor Underlayment Cork 12Mm
Floating Floor Underlayment Cork 12Mm
Soundproof Underlay Cork 12Mm
Half Inch 0.5 Cork Underlay Forna Soundproof Insulation Acoustic
Half Inch 0.5 Cork Underlayment Forna Soundproofing Insulate Acoustics
Floating Floor Underlayment Cork 12Mm
Cork Underlayment - 1/2" (12mm) - 102 sq.ft. box
Acoustic Insulation Cork Unerlayment Bedroom Sound Proof Underlay Copy
12Mm Cork Underlayment Sample
Floating Floor Underlayment Cork 12Mm
Floating Floor Underlayment Cork 12Mm
Floating Floor Underlayment Cork 12Mm
Soundproof Underlay Cork 12Mm
Half Inch 0.5 Cork Underlay Forna Soundproof Insulation Acoustic
Half Inch 0.5 Cork Underlayment Forna Soundproofing Insulate Acoustics
Floating Floor Underlayment Cork 12Mm

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

Made in PortugalCork Underlayment12mm (1/2 Inch)
(1 customer review)

$1.59 per sq.ft. $1.99 Save 20%$162.18 covers up to 102 sq.ft.

$162.18 per box $202.98 · one box covers up to 102.00 sq. ft.
Sale ends Sep 9
SAVE 10% WITH FLOORING: Add flooring plus 2 or more eligible accessory pieces and 10% comes off the accessory items automatically in your cart.
Coverage per unit 102.00 sq. ft.
In stock 24 boxes
sq. ft.
|
boxes
Total $0.00
Box
Secure checkout Shipping shown before payment Project help available
Order a Sample

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 Tested assembly: up to IIC 48 (with 8mm laminate, Riverbank) 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

Info & Guides

HOA approval? Download the HOA Flooring Approval Kit — per-thickness test statements, assembly ratings, certificates, and a cover-letter template your board can file.

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

  1. Dan Whiting –

    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.

Add a review

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.

Related products

-24%
Logan - 5/16" (8mm) - Cork Glue Down Tilelogan cork floor kitchen interior island sink cabinets

Cork Glue Down Tiles

Logan – 5/16″ (8mm) (Glue Down)

$8.79 $6.69 per sq.ft.
-21%
Desert Arable - 25/64" (10mm) - Cork Floatingsustainable flooring cork

Cork Floating Planks

Desert Arable – 25/64″ (10mm) (Cork Floating)

$6.99 $5.49 per sq.ft.
-33%
Salami - 1/2" (12mm) - Cork FloatingSalami cork flooring modern open concept living room.

Cork Floating Planks

Salami – 1/2″ (12mm) (Cork Floating)

$8.99 $5.99 per sq.ft.
-30%
creme royal marble cork floating flooring colour unicliccreme royal marble white cork kitchen flooring

Cork Floating Planks

Creme Royale Marble – 1/2″ (12mm) (Cork Floating)

$8.39 $5.89 per sq.ft.