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Installation Guide

Preparation Underlayment and Subfloor

Tools for the job
Material for the job
People for the job
Crawl spaces
Over existing vinyl floors

Installation Vinyl Sheet & Tile

Setting the first panel
Fastening all other panels
Final check
Installing the new vinyl floor covering
Avoid Going Wrong

Installation Ceramic Tile

Setting the first panel
Fastening all other panels
Installation - mortar
Installation - setting tile

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Installation Guide and Warranty
English (PDF)
Guide de pose et garantie

French (PDF)
Guía de instalación y garantía
Spanish (PDF)

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Moisture content being measured
with a moisture meter.

Preparation - Underlayment and Subfloor


Acclimate panels 24 hours in the room and 48 hours in more extreme conditions.

Floor joists and subfloors expand and contract with changes in humidity and temperature therefore MULTIPLY® underlayment and the subfloor assemblies must be adjusted to the surrounding room conditions that will exist during occupancy.

  • Use caution when carrying and storing MULTIPLY® underlayment in extreme conditions.

  • Separate and store panels vertically around the room or flat with a spacer between each panel to allow air passage on all sides.

  • Avoid excessive use of patching compound and adhesive material and do NOT flood underlayment surface with a self leveling compound.

  • Avoid storing near hot or cold spots such as windows, air registers and exterior doors.

The room must be kept dry and ventilated and at a constant temperature of 70º F (21ºC) during and at least 48 hours before and after installation.

Before installation, whether in new construction or an existing floor in a renovation, it is highly recommended the moisture content of the subfloor be measured using a moisture meter to determine site conditions are right for installation. Refer to the chart below:

CAUTION: A word about Seam “Telegraphing” Seam telegraphing problems are not the result of defective underlayment panels but can usually be traced to two main causes:

  1. Improper installation including failure to sand all seams level or using excessive patching compound.

  2. Changing site conditions including expansion from moisture entrapment or movement in the subfloor.

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