Serenity Ultimate Underlay™ for Nailed Down Wood Floors

Serenity Ultimate Underlay™ Serenity Ultimate Underlay™ is a perfect solution for any floated, glued down or nailed down wood floor. Made from 93% post-consumer recycled rubber, it is not just a "green product," but comes with LEED certification from the US Green Building Council. Our Serenity Ultimate Underlay™ will allow you the beauty and contemporary look of wood floors throughout your project without sacrificing sound privacy.

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Your wood flooring soundproofing solution

Our thickest underlay (1/2" or 11.5mm) is the perfect solution for nailed down wood floors. This product absorbs airborne sounds as well as annoying footstep noise common to wood floors and is thick enough to nail your floor into while still providing that all-important break in direct connection to the subfloor.

When a wood floor is installed to the subfloor with hundreds of nails there are hundreds of direct connections to the floor framing. These mechanical connections are the source of footstep vibration traveling to the room below. Serenity Ultimate Underlay™ solves this problem by isolating a new layer of plywood from the existing plywood sub-floor. "Floating" a new sub-floor breaks this direct connection and provides a new sub-floor that can be nailed to without reaching the floor framing below. A glued down floor can also be applied directly to this underlay.

  • Higher STC Rating (sound blocking) of 55 -- adds tremendous weight to the floor, blocking airborne sound from TV, stereo, voices and more.
  • Higher IIC Rating (footstep blocking) of 53 -- absorbs the noise from footsteps on rigid floors.
  • Breaks the direct connection to the floor framing by "floating" a new subfloor.
  • An excellent option when compared to gypsum topping and two layers of plywood.
  • Hardwood flooring can be glued down directly to Serenity Ultimate Underlay™
Your wood flooring soundproofing solution

Our quality underlays are heavy enough to provide High Impact Isolation (IIC) as well as High Sound Transmission Blocking (STC) to effectively block both foot-fall noise, the most common noise issue with hardwood floors, and airborne noise also. Blocking both types of noise ensures the most privacy.

Serenity Ultimate Underlay™ rolls are 48" wide. They are easy to install. If you are installing below a floated or engineered wood floor, It can be easily rolled out and put into place. Tape the seams with Acoustical seam tape. The floated wood floor is installed over the Serenity Ultimate Underlay™ For glued down floors please see Installation manual PDF file.

Underlays for your specific needs

Available in thicknesses from 1/8" (3.2mm) thru ½" (11.5mm), we stock the right underlay for your project. While thinner underlays such as 1/8" (3.2mm) are typically appropriate for floating wood floors on concrete and thicker underlays such as ½" (11.5mm) are most often used for nailed down floors, your particular application may have a different solution.

residential projects

1/8" (3.2mm) 48" x 25' 50 lbs
1/4" (6mm) 48" x 25' 100 lbs
3/8" (9mm) 48" x 25' 150 lbs
1/2" (11.5mm) 48" x 25' 200 lbs

If you have a smaller project we can cut the roll to a half size. This would be a total of 50 square feet (48" X 12.5') We can also deliver product if needed.