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AcoustiCORK RC1000 Underlayment

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Sale price: $3.18 /sqft
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Rubber CorkAcoustiCORK RC1000 Underlayment

Product Highlights

  • IIC 50, STC 54.
  • Mold and Mildew resistant.
  • Made for crack suppression.

  • IIC 50, STC 54.
  • Mold and Mildew resistant.
  • Made for crack suppression.
  • This underlayment can be directly bonded to the flooring surface with a polyurethane adhesive.
  • Has been formulated to suppress crack formation in the flooring surface due to crack formation on the subfloor surface.
  • Designed to be used under ceramic tiles and hardwoods, but can be used under natural stone, wood, LVT, laminate, engineered wood, cork flooring and bamboo.
Description - AcoustiCORK RC1000 Rubber/Cork underlayment is the thicker version of RC500 and has also been designed to be used under ceramic tiles and hardwoods. This underlayment combines all the qualities of both rubber and cork which makes it very versatile. This flooring underlayment combines the excellent sound proofing qualities of the rubber with the improved adhesive properties of the cork granules. This allows for the flooring to be directly bonded to the underlayment surface unlike other cork underlayments. But a vapor barrier may be needed if specified by a manufacturer’s warranty. Just like the RC500 series, this flooring underlayment provides superior crack suppression, which protects the flooring surface from cracking due to cracking in the substrate. This product has also been shown to provide more sound proofing qualities than 5mm rubber as well.
Material - AcoustiCORK RC1000 is composed of both rubber and cork and consists of 95% recycled material, making this a very eco-friendly product.
Width - 48” wide rolls.
Length - Available in 15’ long rolls.
Thickness - 10mm (~3/8”).
Weight - 88 Lbs. per roll.
Origin - Made in the USA.
Spec Sheet - Printable Spec Sheet.
Recommended Uses - RC1000 underlayment is a favorite to use under ceramic tiles and hardwoods, but has been used under natural stone, wood, vinyl, linoleum, laminates, bamboo, engineered wood, luxury vinyl tiles and planks, and cork flooring.
For direct bonded tile installation instructions, please Click Here.

For glued wood installation instructions, please Click Here.

Rubber Cork Underlayment

  • Why rubber cork underlayment?

AcoustiCORK RC1000 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 hard plastic garage tiles, hardwood flooring and 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? 
Can this product be glued down then put carpet square on top for insulation and padding? I want to use the carpet squares in a home gym located in the basement.
You can use AcoustiCORK RC1000 Underlayment under carpet tiles. The one thing when using and underlayment under carpet tile, it can't be too plush. It has to be pretty solid to keep the tiles from separating due to the pad depressing. You can glue this underlay to the subfloor and it will provide ample comfort underfoot and is a great insulator.
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