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Save 25% off all rubber cork underlayments

Rubber Cork Underlayments

Combination underlay that is specifically designed for crack suppression with superior comfort in mind. Rubber cork underlayment can be installed under most flooring types, but it is ideal for use underneath hardwood and tile floors.

Shop our most popular rubber cork underlayment options:



Standard thickness in commercial and residential.

Products SqFt IIC STC
R12 $0.31 40 52


Can be used under ceramic and hardwoods to prevent unsightly cracks.

Products SqFt IIC STC
RC500 $1.27 50 50


Can be used under ceramic and hardwoods to prevent unsightly cracks.

Products SqFt IIC STC
CRC950 Sheets $2.42 52 56
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Shop All Rubber Cork Underlay

Affordable sound resistance with superb moisture resistance.

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Why Rubber Cork Underlayments?

Pros and Cons


  • Specifically made for crack suppression.
  • Is mold and mildew resistant.
  • Does not have to be adhered with adhesive.
  • Will expand and contract with your flooring surface.
  • Provides added comfort to your flooring.


  • Can stain vinyl, VCT, and linoleum.
  • Recommend a vapor barrier.

Why Do I Need Underlayments?

Without Underlayment With Underlayment

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. This image 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.



IIC/STC Ratings

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.


Sound Control Graph

Estimated Sound Control

Sound Control Graph
Rubber cork underlayment is great for crack suppression making it popular under tile and hardwood floors. Since this underlayment contains both cork and rubber, it contains the best and worst of each. Like cork underlay, these rolls are mold and mildew resistant and have great thermal properties. Also like cork these acoustical underlayments will expand and contract with your floor. Unlike cork, these rolls can be installed loose laid, taped, glued, nailed or stapled. Rubber cork underlayment should not be installed under LVT, LVP, VCT and linoleum because of staining issues. Rubber cork underlay can be install virtually anywhere in your home or business and a vapor barrier may be needed in areas where moisture is an issue.