Step 1

mark cut lines on plywood using T square

mark cut lines on plywood using T square

Mark the Cut Lines

Use a T-square to mark the cut lines on the plywood.

Step 2

cut plywood to size with circular saw

cut plywood to size with circular saw

Cut the Plywood

Cut the plywood to size, running the circular saw across the width of the board.

Step 3

mark floor joist locations on wall

mark floor joist locations on wall

Mark the Joist Locations

Using the original sub-floor nails as a guide, mark the floor joist locations on the wall to know where to insert the screws.

Step 4

lay plywood in place on floor

lay plywood in place on floor

Lay the Plywood

Lay the plywood in place on the floor.

Step 5

drive deck screws every 8 inches along chalk line

drive deck screws every 8 inches along chalk line

Insert the Deck Screws

Run a chalk line off the floor joist to mark the wall. Then, drive deck screws every 8 inches along the line.

Step 6

lay cement board down on plywood

screw cement board into plywood

Attach the Cement Board

Bring in the cement board and lay it down on the plywood (Image 1). Screw the cement board into the plywood about every 6 inches (Image 2).