COOL WINTER SALE

FloorMuffler Premium Underlayment with Ultra Seal is always on sale for only $45 per roll. That's more than 40% off its retail MSRP.

FloorMuffler underlayment is always in stock and ships on the next business day, GUARANTEED.

Price includes FREE nationwide delivery by USPS.
(Orders are usually received in 2-4 business days)

Please call us @ 1-800-674-8088 if you have any questions.

Available in 100 square foot rolls; 36" wide X 33.33" Long.



What is FloorMuffler Underlayment?

FloorMuffler is the finest and most effective acoustical and moisture barrier underlayment in the market. FloorMuffler utilizes a state-of-the-art technology by employing high-performance polypropylene cell. This process virtually eliminates the sound transmission of foot traffic to the rooms below. It also protects the wood floor from any moisture coming through the sub-floor.

Why choose FloorMuffler underlayment?

FloorMuffler is the right underlayment choice for the following reasons:

  • The ultimate sound proof underlayment for both foot impact on the surface as well as sound transmission to the floor below. It has the highest ratings of all the other underlayment available in the market.

    • Impact Isolation Class (IIC) rating: 74
    • Sound Transmission Class (STC) rating: 73
  • Superior moisture protection with an advanced premium polypropylene cell. (Independent tests show that the FloorMuffler Performed 750% better than the industry standard for moisture vapour transmission).
  • No need for any extra film or poly.
  • Protects the structural stability of all wood floors.
  • Proven mold and mildew resistance per ASTM G21 test:
    (ASTM G21 is the standard practice for determining resistance of synthetic polymeric materials to Fungi).
  • Environmentally Friendly.
  • Comes with a self-sealing 6 Mil sheet for easy installation.
  • Light weight for easy handling.
  • For use with all hardwood, bamboo, engineered, floating and laminate floors.

How to install FloorMuffler underlayment?

For best results, please follow these instructions:

  • Make sure the sub-floor is structurally sound, level and is free of dust and debris.
  • Check for protruding nails and/or defects in the sub-floor.
  • If installing over concrete, the concrete must be dry with moisture emission rates that do not exceed 3 lbs. per 1000 square feet per 24 hours as measured by the ACCT (Anhydrous Calcium Chloride Test). We recommend FloorMuffler with ultraseal for maximum protection.
  • Using FloorMuffler under nail-down or stapled hardwood flooring will eliminate the moisture barrier feature. The sound proof feature will be slightly affected but not entirely eliminated.

REGULAR INSTALLATION: (For nail down or floating floors).

  • Install one sheet of the FloorMuffler parallel to the wall.
  • Cut the FloorMuffler with a utility knife leaving at least 2" going up to the wall on all sides which will allow any moisture to vapour by the walls. This 2 of FloorMuffler left around the room will be covered by molding or baseboard.
  • Install the next sheet of FloorMuffler, butting the seams together. Sealing the two sheets by adhering the 6 Mil PINK Poly sheet to the blue tape. Make sure you do not overlap the seams.
  • Follow these steps until the room is completely covered.
  • Work slowly to avoid tearing up the FloorMuffler. (In case the FloorMuffler is torn, either replace the torn sheet or cover the tear with duct tape).


GLUE-DOWN INSTALLATION: (For glue-down engineered or bamboo floors).

You will need two different type of adhesives, both are made by Diversified underlayment. The first is HPPA (shown below) is used to adhere the FloorMuffler to your sub-floor. The second is EWA (shown below) is used to adhere engineered or bamboo planks to the FloorMuffler.

  • Glue the FloorMuffler to the sub-floor with HPPA using the same procedure above.
  • Do not stretch the FloorMuffler, but make sure it is completely flat on your sub-floor.
  • Once the FloorMuffler is adhered to the sub-floor, you may start installing your engineered or bamboo floor using EWA.

HPPA: High Performance Pad Adhesive:

Used to glue the FloorMuffler to the sub-floor, HPPA is a revolutionary breakthrough in adhesive technology. A solvent-free, latex resin emulsion, which allows the contractor to install the non-porous pad within 20-30 minutes after spreading the FloorMuffler HPPA. This will increase productivity without compromising the integrity of the installation. The ultra-fast flash time grabs The FloorMuffler and holds the pad in place while the installer lays the wood flooring. Available in 4-Gallon Pails and covers approximately 540 square feet per pail.

Please call 1-800-674-8088 or Email us for a price & shipping quote.


EWA: Engineered Wood Adhesive:

Used to glue engineered planks up to 7" wide to the FloorMuffler. EWA is a high solids, water resistant, proprietary Co-Polymer adhesive. Available in 4-Gallon Pails and covers approximately 220 square feet per pail.

Please call 1-800-674-8088 or Email us for a price & shipping quote.


It is highly recommended that you use these Adhesives for this process to ensure better results and a full warranty on the installation of your floor. If you feel you need help during the installation or if you have any questions, please do not hesitate to call us. We're always glad to help.