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Cork Underlayment



Dream Home 6mm, 12mm Cork Underlayment

RECOMMENDED INSTALLATION of  CORK UNDERLAYMENT

    

* READ COMPLETELY BEFORE STARTING INSTALLATION.

Recommended underlayment for glue down (double-stick), click, floating-engineered and laminate floor products. Do not use under naildown flooring.
*Always refer to your flooring manufactures installation instructions for proper application.

Cork Sheets contains millions of air-filled pockets per cubic inch. These air pockets allow compression yet will regain their shape once pressure is removed thereby creating a gentle cushiony surface flooring material. With cork underlayment you are literally walking on air!

  • Ideal choice for condominiums and building associations requiring sound control before allowing the installation of a hard surface floor.
  • Excellent sound and insulation qualities, Cork underlayment is a natural choice as an isolation barrier to dampen impact noise going from an upper living area to a lower living area.
  • Improve walking comfort by dispersing the impact energy of each footfall to lessen the strain on knee and hip joints.
  • Smooth out minor imperfections in the sub-floor surface.
  • Improve the thermal insulation characteristics of the flooring assembly
  • Adds R-value of 0.8 ?

STC & IIC Ratings Installation: Concrete Condominiums
FIIC: 59dB ASTM E492
STC: 55dB ASTME90

DREAM HOME cork underlayment must be laid indoors on a clean, stable, flat, smooth and dry surface. Handle packages carefully during transport to avoid damaging the corners;

Before Installation, Acclimate
Store DREAM HOME cork underlayment flat in the room in which they are to be installed, well-ventilated for a minimum of 48 hours in open packaging, at room temperature (15-30C / 60-85F and a maximum of 75% relative humidity). During storage and installation, maintain the temperature and relative humidity to a level consistent with those conditions that will prevail when the building will be occupied. Correct acclimation requires heating or air conditioning for an appropriate length of time prior to beginning the installation.

Moisture testing (Wood Subfloors)
Verify by using a moisture meter (pic1) that will have individual species settings such as; (Tramex, Ligno-Mat, or Delmhorst) to name a few.

Moisture testing (Concrete Subfloors)
Test concrete substrates in several locations for best averages. If test results show moisture vapor exceeds the maximum requirements for the adhesive do not install.
Acceptable industry standards ASTM for moisture testing
In-Situ Probe Method (ASTM F 2170): The Relative Humidity levels should not exceed 75%.
Calcium Chloride Test (ASTM F 1869): The maximum vapor emissions cannot exceed 3lbs/1000SF in 24 hours.
Concrete Moisture Meters; Tramex Encounter: Not acceptable as an industry standard.




Cork Underlayment Installation Guidelines

Subfloor Preparation
Existing subfloors are required to be dry, sound, smooth and should be flat to within 3/16" in 10 feet or 1/8" in 6 feet radius.

When installing Cork under Glued Down hardwood Floors
Existing substrate must free of dust, soils, coatings, and sealers (contaminates).
*Follow the adhesive manufacturers' recommendations for type of adhesive, floor prep, moisture barrier and trowel size.
Work in small sections at a time, (It does not matter if the sanded side of the cork sheets is facing up or down). Roll the cork underlayment in both directions with a 100-pound floor roller to eliminate any air bubbles and to fully adhere the cork to the subfloor. Be sure that all joints have a slight gap when butted together. Do not begin the installation of the new flooring until the underlayment and adhesive is fully cured.

Wood: Sand down any high spots or high subfloor seams. Low spots should be cut out and repaired

Concrete: Patch all cracks, holes and control joints with a Portland cement based compound. Make sure patches are completely dry.

[CAUTION] Most installation failures result from jobsite moisture. Moisture barriers are always recommended.
Do not unpack or deliver flooring to the jobsite until moisture problems are corrected.
Note that flooring adhesives may have special requirements and limitations of use. Follow closely the adhesive labeling instructions and adhesive Technical Data Sheet pertaining to moisture testing procedures, moisture barriers, and trowel size recommendations. Depending on the selection and application of a particular adhesive, you may be required to use moisture barriers. Adhesive Technical Data Sheets can be found on the adhesive manufacture's website. When in doubt about an adhesive application or requirement call the adhesive manufacturer.
Follow the adhesive manufacturer's recommendations can prevent installation failure and maintain your warranty.

When installing Cork under Floating Floors
Applications over concrete and all non-porous flooring: Apply plastic poly-sheeting between the cork and cement. Applications over wood substrates: Apply 15LB roofing felt or similar between the cork and the subfloor.
Starting against one wall layout the cork and cut it to the desired length. Maintain a %" expansion gap around all walls. Continue loose laying cork underlayment for the rest of the installation making sure that all the joints between sections cork are butted together. Tape the joints with an aggressive plastic tape during the installation of the flooring.

Radiant Heating Systems
Cork Underlayment is approved for radiant heat systems. Be sure the flooring to be installed is compatible with radiant heating systems. For concrete subfloors first be sure the slab is fully cured. Operate the system for at least 56 days before the installation to dry out any residual moisture. Operate the system on the low setting during installation. Do not exceed 85 surface temperatures.

NOTE: In order for any isolation barrier to function correctly, a certain amount of compressibility is required. A completely solid underlayment layer, one that allows no compression, is not an isolation barrier. Although cork has a density and compression resistance higher than most isolation barriers, a certain amount of deflection is to be expected when used as an underlayment. That deflection may cause a minimal amount of friction "floor noise". The noise factor will vary, from one installation to the next, depending on sub-floor type, sub-floor deflection, type and species of flooring material, relative humidity and the amount of topside pressure applied to the flooring material. Therefore, floor noise or squeaks are not manufacture related. The thermal benefits of cork underlayment vs. squeaks should be considered before installation.

The use of mechanical fasteners such as nails, screws or staples to adhere cork and or flooring will diminish the acoustical values of the cork underlayment and is not a warrantable application.

All installed sheets will be considered as accepted by the installer and/or homeowner.

Getting Help
Read and understand these instructions completely before beginning an installation. If you still have any questions after reading this, or if you feel you need additional information, call Lumber Liquidators Customer Care at 1-800-366-4204


09/04/2014