WE Cork | Cork Flooring | Cork Underlayment



For sound control and stress crack protection under ceramic tile, marble and hardwood floors.

WECU (pronounced “we see you”) is our economical and effective cork underlayment. We are proud of its flawless track record since its introduction in Florida in 1978 where tens of millions of square feet of WECU cork underlayment have been installed. A special preservative has been incorporated into the cork and binder mixture making WECU impenetrable to moisture. The density this process creates provides both effective sound control as well as stress crack protection. It is by far the most reliable cork underlayment on the market. WE Cork is available in Boston, San Francisco, New York among many other cities. Call American Flooring Distributors at 888-900-7892 for more information on sound control underlayments.

WECU is the economic and effective solution for sound control and stress crack prevention under ceramic tiles and hardwood floors.


Harbor Towers, San Diego, CA
WECU Soundless+ under
ceramic tile and hardwood.

Meets typical building codes for sound control for buildings with a suspended ceiling under ceramic tile, and non suspended ceilings under hardwood and laminate. 6mm/1/4″ thickness.


Meets typical building codes for wood joist structures with or without suspended ceiling and provides superior sound control for concrete substrates with or without a suspended ceiling. 1/2″ thickness.


A two in one product, which offers both sound control as well as a vapor barrier under floating floors. Silently+ is a low profile, easy to install rubber cork product with superior and economical sound control. 2mm thickness.


Provides superior isolation of ceramic tile, marble and stone from existing and future stress cracks.

After its introduction in the fall of 2001, Crackless+ has been gaining increasing popularity due to the following attributes:

High Density Resilience derived from the combination of rubber and cork, Crackless+ offers protection from stress cracks created from settling of new construction or structural movement in existing buildings.

Ease of Installation is assured by Crackless+’s small and very portable roll size, and the use of typical tile setting materials. No mixing, no waiting, no mess – an installers delight.

Low Profile is guaranteed by Crackless+’s uniform 3/64″ thickness, which will give protection over just existing cracks or offer valuable insurance for the entire floor.

Economical due to the attributes mentioned above, and its low cost, Crackless + offers unparalleled protection with minimal investment of time and money.


2mm Rubber and Cork underlayment for LVT and Linoleum floor covering.

Offers superior in room as well as floor to ceiling sound control with minimum thickness.

Thermal insulation from cold subfloors.

Resilience and comfort to LVT and Linoleum flooring.

100% recycled content.

Resistant to mold and mildew.


Warm&Quiet (3mm): Underlayment for laminate and engineered wood floors

Its closed cellular structure makes for an excellent answer for footsteps that cause loud resonance within the room and the cause of the highest complaints for laminate flooring. “It makes a fake floor sound real”

Unlike foam products that are on the market, this product will not compress and lose its efficacy over time.

Warm&Quiet also adds thermal insulation, taking the edge off on and below grade floors. Reduces energy costs in cold months.

Warm&Quiet has significant insulation value for transmission sound from the floor to the room below. It has a Delta IIC 25, which is tested in an Independent Lab and shows the improvement of Warm&Quiet on a 6” slab, non-suspended ceiling.

Warm&Quiet+ (6mm): Underlayment for laminate and engineered wood floors

Warm&Quiet+ has all the above attributes plus –
Higher thermal insulation value, equals more energy savings
Higher sound control rating for wood engineered and laminate floors

WE Cork | Cork Flooring | Cork Tiles » Underlayment.

The purpose of this information is to provide Homeowner’s Associations information relating to the acoustical performance of floor/ceiling assemblies. This should facilitate the HOA in establishing guidelines to meet the needs of their building. This information is for guideline purposes only. Each building is unique. The building should contract with appropriate legal counsel and design professionals prior to incorporation of binding requirements within CC&Rs.


In multi-family dwellings, acoustical consultants use the following terminology to define the performance of a floor/ceiling assembly.

  • STC: Sound Transmission Class. This is a laboratory measurement of the ability of a specific construction assembly (such as a partition, window, door, etc.) to reduce airborne sounds including voice, television and alarm clocks.
  • Noise Isolation Class. This is an over-all measure of the sound isolation between units in a multi-family dwelling. This quantity is a field measurement of the ability of a partition, floor/ceiling assembly, etc., to mitigate airborne sounds including voice, television and alarm clocks.
  • Impact Insulation Class. This is a laboratory measurement of the ability of a floor/ceiling assembly to reduce impact sounds such as footfalls. For more information regarding how IIC ratings are calculated, please click HERE.
  • FIIC: Field Impact Insulation Class. This a field measurement done in situ after a floor installation is completed.

The higher the value of any of the quantities above, the greater the airborne or impact isolation provided by the assembly.


Building Code requirements that include Sound Insulation Standards normally require that:

  • Airborne Sound Insulation is not less than STC 50 if laboratory tested, or not less than NIC 45 if field tested.
  • Impact Insulation is not less than IIC 50 if laboratory tested, or not less than FIIC 45 if field tested.

Buildings are not soundproof. Sounds from adjacent units or other building activity are almost always audible even when the building code requirements are met.


Building construction floor/ceiling assemblies vary and can affect the types of sound heard from unit to unit.

  • CONCRETE: No Suspended Ceiling. A concrete slab is the only vertical separation between dwellings. Impact sound transmission is normally the major concern. Impact noise from heels or movement of chairs on floor often audible below.
  • Suspended Ceiling. Concrete slab with a gypsum board ceiling hung below at some distance.Impact noise transmission is normally the major concern.
  • WOOD: Typical construction includes joists, plywood, lightweight concrete, sound insulation, drywall and resilient channels. Higher potential for complaints because of lightweight nature of floor/ceiling assembly. Thudding from footfall almost always present. Impact noise transmission is normally the major concern.

In floor/ceiling assemblies, typical finish flooring is carpet or hard surface. The IC/FIIC code requirements are almost always met with carpet. If a carpet is going to be replaced with hard surface, there will be significantly greater impact noice transmission to the unit below.

Role of Sound Rated Flooring Utilizing Resilient Underlayments

In any of the buildings described, a sound rated flooring system, when properly installed, will significantly improve the IIC/FIIC when compared with a non-rated hard surface floor system. The sound rated flooring products do not have a significant effect on the STC/NIC of the floor/ceiling assembly.

What Can An HOA Do?

The CC&Rs of the building allow the HOA to maintain a level of airborne and impact sound isolation appropriate for the building design. We address the flooring issue below.

  • Establish a FIIC requirement for hard surface flooring. Guidelines are provided in the table below. Many factors should be considered in establishing your building requirement and the values provided below are given for guidance only.