DIY Network

How to Install Cement Board

It's important to install cement board over a subfloor in order to a get a beautiful tile floor.

More in Floors

  • Time

    Under Half Day

  • Price Range

    $50 - $100

  • Difficulty



Step 1: Measure and Mark the Board

Measure to the first floor joist to ensure the edge of the cement board lines up with it. Transfer that measurement to the board and draw a line with a straight edge.

measure and mark cement board

Step 2: Score the Cement Board

Score the cement board with a utility knife and snap it off.

score cement board with utility knife

Step 3: Cut Holes

To cut holes, make a cardboard template, mark the board on both sides and score it (Image 1). Then, tap the circle with a hammer to remove it (Image 2).

Step 4: Secure the Boards

Once all the boards are in place, mark the joist locations and secure the boards down with cement board screws.

secure the boards down

Step 5: Fill in the Seams and Gaps

Use mesh tape and thinset to tape and mud the seams. Also, use thinset to fill in any large gaps around the edges.

tape and mud the seams