Step 1: Prepare the Panels

Bring in the sub-floor panels to the space at least two days prior to the installation so they climatize to the relative humidity of the room (Image 1).

Dryfit sub-floor panels to see how they lay out (Image 2). This prevents ending up with a small sliver at the end. To adjust the panels, cut some inches off the starter row using a table saw. Cut in a well-ventilated area.

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    Image 1

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    Image 2

Step 2: Install the Spacers and Panels

Add temporary 1/4" spacers between wall and the sub-floor panels to allow room for expansion and contraction (Image 1). These will be removed after the floor is installed.

Use a tapping block to ensure a tight seam (Image 2). Stagger the seams for a more stable floor (Image 3).

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    Image 1

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    Image 2

Step 3: Place the Leveling Squares

If there is a deflection in the floor of less than 1/2", stack up as many leveling squares as needed and check to make sure the panels are level. If the deflection is more than 1/2", concrete repair will be needed.