Insulayment Multi-Purpose Acoustical Underlayment

  • Ideal for glue-down, nail-down and ceramic tile flooring
  • Underlayment is a superior sound barrier
  • Flooring underlayment resistant to mold and mildew growth
100 Sq Ft3'x3.33'INSUL100 360 Sq Ft6'x60'INSUL360


Sound Reduction

Sound Reduction

Absorbs sound, keeps it from traveling to other rooms. Also help to make the wood floor feel more solid underfoot.

Glue Down Flooring

Glue Down Flooring

The recycled fiber composition provides excellent bonding strength with adhesives and thin set mortars.

Nail Down Flooring

Nail Down Flooring

Not recommended where flooring is less than 3/8" thick or less than 3" wide.

Smoothing Out Imperfections

Smoothing Out Imperfections

This cushion is firm and supportive but flexible enough to form around subfloor surface roughness, helping to cut down on extra surface prepping time

Insulating Value

Insulating Value

Provides additional comfort to the entire home during seasonal temperature changes.

Made From Recycled Material

Made From Recycled Material

A patented manufacturing process repurposes post-industrial and pre- and post-consumer materials into high-performance underlayment.

Certified Clean and Safe Indoor Air Quality

Certified Clean and Safe Indoor Air Quality

No VOC's (Volatile Organic Compounds) or off-gassing from materials.

If you are looking for a test report please send an email to [email protected] and specify the product and type of report you are needing. We would be more than happy to email you a copy of any testing data that we have.

When installing Insulayment with porcelain tile, we recommend using a latex modified portland based thinset that conforms to ANSI A118.4.

Insulayment will provide thermal insulation, making your radiant heating system more effective.

Insulayment is not approved for use with sheet vinyl or linoleum flooring.

Insulayment is approved for flooring applications only. We do not have testing to establish safety or effectiveness in wall applications.

QuietWarmth Tile and Insulayment with tile floor covering are only approved in conditions where the subfloor meets the standards established by the Tile Council of North America. If your subfloor meets these standards, the proper method to install these products would be to spread a layer of thinset over the top of the Insulayment, then lay the QuietWarmth tile mat(s), then install your ceramic tile.

We recommend installing Insulayment with a latex modified thinset. The thinset listed would be one of many options suitable to use.

Insulayment has not been tested with “puzzle” or “gym” type flooring options. We cannot attest to suitability.


Leave Reviews
by Ali1 - Lowe's Review

Easy to use underlayment

Good quality, made with recycled fibers, easy to use. Clear instructions, but in English only. Cuts easily with a sharp utility knife.

by Ryan B. - Amazon Review

Added benefit.

by Robert - Home Depot Review

This is a very high quality dense underlayment and works...

This is a very high quality dense underlayment and works amazingly to control heat loss and noise transfer . basemen

Sound Rating Test

View All Insulayment®

Impact Insulation Class (IIC)Sound transmission through the floor.


Sound Transmission Class (STC)Airborne sound transmission through a partition.


Delta IIC (IIC)Sound transmission difference between a concrete subfloor with and without flooring.

* The higher the number, the better the noise control!

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