Premium Birch Plywood Underlayment

Plywood With Exceptional Quality


Designed by Installers for Installers!

  • Lifetime Warranty (Commercial & Residential)
  • For Use Under all Floor Covering
  • Scores & Snaps with a Knife
  • 5-Ply Dent Resistant Construction
  • Marine Grade Adhesive
  • Guaranteed Against Yellowing and Delamination
  • 1/4" Nominal Thickness
  • 3/8" Nominal Thickness
  • 100% Farmed Sustainable Wood
  • 4' x 4' & 4' x 8' sheets available

Installation Instructions

Acclimate U-PLY®X panels 24 to 48 hours to the room environment in where they will be installed.

  1. Install U-PLY®X printed side up before installing the finished floor.
  2. Install the long dimension of the panel perpendicular to the floor joints for maximum rigidity.
  3. Offset seams with sub floor seam by at least 6'. U-PLY®X scores and snaps with a knife for easy installation.
  4. Stagger panels, ashlar fashion so that four corners do not meet. Offset underlayment joints by at least 16".
  5. Leave a minimum 1/8" gap at walls.
  6. Lightly butt all panels, but don't force sheets into place.
  7. Fasten panels securely to a structurally sound, smooth, clean and dry sub-floor with 1/4" staples with chiseled ends and or 12 gauge non-staining galvanized ring groove shank nails.
  8. Make sure fasteners don't penetrate through the sub-floor into floor joist.
  9. Position fasteners on each X mark.
  1. Attach edge fasteners 1 1/2" apart and 3/8" from edge.
  2. Set fasteners flush or slight below the panned surface.
  3. Option 1: Fill all edge joints and other service depressions with a Portland Based Latex Modified Patch and lightly hand sand smooth. No belt sander, as we have pre sanded U-PLY®X. Make sure patch is FULLY DRY before installing the finished floor. Option 2: Do not use patch at all, just make certain all panels are lightly butted together.

NOTES & EXCEPTIONS Woodstock Supplies has the highest standards of quality in the marketplace. Environment and temperature should be noted to ensure proper acclimation. Flooring should be installed immediately after underlayment installation to prevent site-influenced damage. Woodstock Supplies is not responsible for faulty installation. No defective material is to be installed. Final inspection of each panel is the responsibility of the installer.

Lifetime Warranty 100% Job Replacement

U-PLY®X Premium Underlayment will hold all floor coverings firmly when the floor covering is installed in accordance with the floor covering and adhesive manufacturer’s instructions. U-PLY®X is guaranteed for life in all applications when product is handled and used as floor underlayment in accordance with these installation instructions.

  • Not to delaminate
  • Not to be the sole cause of “yellowing”
  • Not to transfer wood colors to the floor covering

Under this warranty, any and all implied warranties are expressly limited to, at the company’s option: Refunding the full cost (including installation cost) of the underlayment, adhesive and floor covering affected.

In the event of yellowing, an independent lab will be employed to determine the cause of the yellowing, the “at fault” material supplier will be liable for all costs incurred due to the problem. In no event shall the company’s liability for any claim exceed the wholesale cost (including installation cost) of the underlayment, adhesives, and floor covering affected. This warranty does not cover damages due to improper installation of floor covering material.
In addition, tears or rupture to the floor surface, tile pop, standing water, fire, floods, natural disasters, or faults in the plumbing which affect the performance of the flooring system are not covered. This warranty covers all commercial and residential applications. Liability shall expressly exclude any other liability to the purchaser or any other person for direct, indirect, or consequential damages.

You must notify Woodstock Supplies within 30 days after discovery of product found to be defective under this warranty. An authorized representative from Woodstock Supplies must be given the opportunity for 30 days after such notice to inspect the floor prior to any alterations, change, or repair. In any case, where Woodstock Supplies is not notified before any alterations, change, or repair is made to the floor, Woodstock Supplies is released from any liability on the claims.

All claims must be submitted in writing within 30 days after the discovery of any defect. Please email to office@woodstocksupplies.com.