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AcoustiCORK R12 Underlayment

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Rubber CorkAcoustiCORK R12 Underlayment

Product Highlights

  • Most popular rubber cork.
  • IIC 40, STC 52.
  • Designed for crack suppression.

  • Most popular rubber cork.
  • IIC 40, STC 52.
  • Designed for crack suppression.
  • Can be installed under the whole flooring surface or just in areas where cracks have occurred.
  • Composed of both rubber and cork.
  • Designed to be used under ceramic tiles and natural floors, but can be used under hardwoods, luxury vinyl tiles and planks, engineered wood, bamboo, laminate, and cork flooring.
Description - AcoustiCORK R12 1.2mm is a composite underlayment composed of both cork and rubber. This flooring underlayment has been specifically designed to prevent unsightly stress cracks that are caused by structural or thermal movement which can reflect through to ceramic or natural stone floors. Since this is composed of both rubber and cork, this flooring provides you with the benefits and drawbacks of both. This underlayment can be installed over concrete and can also be laid over the entire surface or in just the areas where cracks have occurred in the subfloor surface. This flooring underlayment would also need to be adhered with adhesive and a vapor barrier may be needed if required by a manufacturer’s warranty.
Material - AcoustiCORK R12 flooring underlayment is composed of both rubber and cork which are both eco-friendly products.
Width - 50” wide rolls.
Length - Available in a 75’ long roll.
Thickness - 1.2mm (~.0472in.).
Weight - 61 Lbs. per roll.
Spec Sheet - Printable Spec Sheet.
Recommended Uses - R12 rubber/cork underlayment is a favorite to use under ceramic tiles, natural stone, but it has been used under, hardwoods, linoleum, bamboo, cork flooring, and luxury vinyl tile and plank.
For installation instructions over concrete, please Click Here.

Rubber Cork Underlayment

  • Why rubber cork underlayment?

AcoustiCORK R12 rubber cork underlayment offers superior sound resistance while providing crack suppression with superior comfort. Comprised of recycled materials, this environmentally friendly product provides cushion underfoot as well as reducing sound transmission and impact sound such as footsteps. Rubber cork underlays are great for residential and commercial use.

Do I REALLY need underlay?

  • Yes, most definitely.

Underlayment is an amazing invention created by the flooring gods out of necessity. Underlay has an impressive list of benefits, including: adding warmth to your floors so your feet aren’t so cold on new tile flooring, adding comfort and a slight ‘give’ underneath wood or vinyl floors, reduced sound transmission (great for houses with noisy teenagers!), as well as reducing in room step noise. The image to the left is a very simplified example of using underlayment versus not using it, but as you can see the benefits greatly outweigh any reason not to.

Making your house a home

  • Products that work together

A favorite for use with ceramic tiles and hardwoods, laminates, and natural stone floor tiles. Rubber underlayment should never be used with vinyl flooring, VCT, or linoleum flooring as it could potentially stain these materials.


  • What does it mean?

Underlayment with a thickness of up to 5mm thick are great when it comes to residential or commercial use, with all flooring types. When you get to more than 5mm thick, these are really great for installations where you need to add thickness to match up with an adjoining/existing floor surface.

IIC / STC Ratings

  • What do they mean?

IIC stands for Impact Insulation Class, which refers to impact sounds such as shoes hitting the ground, dropping a cell phone, or other scenarios where something it dropped or impacts the floor. STC stands for Sound Transmission Class, which refers to any audible noise (not an impact) such as music playing aloud, a conversation, or a loud television, for example. With both of these ratings systems, the higher the number rating is for the underlayment, the better it will suppress sound, and the quieter a room will be. You may want to pay close attention to these ratings when shopping for underlayment if sound reduction is important to you.

Don't see what you're looking for? 
Could this product be used outdoors on a deck? We would like to refinish our deck by laying a new flooring material (as opposed to sanding and resealing). If this underlay was placed on top of the old deck surface, could rubber tiles or outdoor carpet be put on top? Thanks!
Andrew Fenton
You can use our AcoustiCORK R12 Underlayment under a floor outside over a deck. Cork is naturally mold and mildew resistant and is very easy to install and maintain.
Will this product help keep the floor warm? I'm looking to tile a 400sqft room that has an uninsulated concrete slab as a floor, so I desperately need a thermal barrier to help keep the room warm in the winter.
AcoustiCORK R12 Underlayment will help to keep your room warmer than just having the concrete slab exposed. The R-Value for this floor is 3.125.
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Average Rating
Visual representation of average product rating from all associated reviews using stars

Visual representation of product rating from review using stars
  No Curl
Self-installed in Mud Room
Steve from Merrimack, NH wrote...
The R12 AcoustiCORK was easy to use and put down. And there was absolutely no curl, even though it ships on a roll.
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