Roberts Unison 2-in-1 Premium Underlayment

Roberts Unison 2-in-1 Premium underlayment is a 3/32″ polyethylene foam underlayment that increases cushioning between flooring and subfloor. It comes with a 4″ film overlap with adhesive strip for seamless protection of your floor and subfloor. The top film protects from harmful moisture vapor from ruining your new flooring.

Gather Your Supplies

Gather your supplies before you being your underlayment installation to make sure you have everything you need within reach!

  • Roberts Unison 2-in-1 Underlayment
  • Broom or a Shop Vacuum
  • Utility Knife

Begin Installation

Step 1: Clean and Prep the Subfloor

Having a properly prepared subfloor is a key to any flooring installation. Check out the details for concrete and wood subfloors. Always follow the flooring manufacturer’s installation instructions with respect to preparing and leveling the sub-floor. Make sure the subfloor is level, clean, and dry. After you have done everything to prepare your subfloor properly, it is time to begin the installation.

Step 2: Get Un-Rolling!

Unroll the Unison 2-in-1 Underlayment with the film overlap and adhesive strip facing up away from the subfloor. Place the adhesive strip end of the roll along the longest wall to start. This will leave the overlap flap away from the wall and ready for the second row of underlayment.

Step 3: Cut

Cut the underlayment about 2 inches longer than the room length on each end. Run the underlayment 2 inches up on each wall. This 2 inch perimeter running up the walls provides a moisture-proof enclosure for the flooring.

Step 4: The Second Roll

Lay down a second row of underlayment alongside the first so that the edges of the foam meet and the overlapping film lies on top of the second sheet. Do not overlap the foam.

Step 5: Stick It

Remove the white protective cover from the adhesive strip, lay the overlapping film from the first row over the adhesive strip of the second row and press into place. Continue Steps 4 and 5, row by row, until the entire floor area is covered.

Step 6: Trim It

After the flooring is completely installed, trim the excess underlayment back to the height of the finished floor. Do this prior to installing base of molding.


Need help selecting the right underlayment for your flooring project? Contact one of our flooring experts to guide you through the types.