How to install underlayment for vinyl plank flooring

All subfloors must be flat, clean, smooth and dry
Sand any rough surfaces and/or uneven jobs
Fill any cracks on concrete or panel joints wider than 1/8″ using a recommended patch/leveling product

Installation Methods

Floating Floor Installation

Be sure the subfloor is clean, smooth, and free of dust and debris
Unroll the QuietWalk Luxury Vinyl Underlayment and flip it over so the film side is up (felt side down)
Make sure that underlayment seams run perpendicular (at a right angle) to the long dimension of the planks.
Underlayment must be positioned with a minimum 4” separation between seams of underlayment and seams of finished flooring products
Trim the perimeter edges of the QuietWalk Luxury Vinyl Underlayment 1/4” from the wall
Butt seams together and seals using the factory attached lip and tape system.
For seams that do not have the lip and tape feature, use a good quality single-faced tape to seal the seams
Install the floor covering product according to the manufacturer’s instructions

Double-Glued Installation

Double Glue Down installations are approved with flooring that is a minimum thickness of 4mm.
Be sure the subfloor is clean and free of dust and debris
Unroll the first drop of QuietWalk Luxury Vinyl Underlayment and flip it over so the film side is up (felt side down)
Make sure that underlayment seams run perpendicular (at a right angle) to the long dimension of the planks
Remove the lip portion of the lip and tape system with a utility knife and discard
Remove the tape strip cover portion of the lip and tape system and discard
Trim to fit the QuietWalk Luxury Vinyl Underlayment into the target areas.
Move the trimmed-to-fit underlayment to the side to apply the adhesive
Apply a recommended pressure-sensitive adhesive using the flooring manufacturer recommended trowel
Once the adhesive has flashed (dried to a tacky touch) place the trimmed-to-fit underlayment into the adhesive
Butt seams together and apply 2” wide clear packaging tape centered over the seam
Roll the adhered QuietWalk Luxury Vinyl Underlayment with a 100 lb flooring roller
Mark starting lines on Underlayment for placement of finished flooring product
Apply a recommended pressure-sensitive adhesive using the flooring manufacturer recommended trowel
Once the adhesive has flashed (dried to a tacky touch) you can begin flooring installation according to the manufacturer’s recommendations
Make sure the staggered end joints fall at least 2” away from the underlayment seams
Maintain a minimum expansion gap of ¼” around the perimeter of the room
Follow flooring manufacturer recommendations for installing transitions in large-span applications and doorways
Roll the finished floor with a 100 lb flooring roller
Be sure not to slide flooring into a position which could potentially displace adhesive

Mechanically Fastened Hardwood Floors

Unroll the underlayment and ensure vapor side is up and fibers are to the subfloor.
Install underlayment in opposite direction to the flooring material. You can tape the seams but it is not necessary.
Install the hardwood per manufactures written instructions, using their recommended fastening materials.