The answer is yes, but with specific considerations. While it is possible to install backer board on a wooden subfloor, it is crucial to ensure that the subfloor meets certain requirements:
- Structural integrity: The wooden subfloor must be structurally sound, free from any signs of damage or rot. Any weak spots should be replaced or strengthened before proceeding with the installation.
- Level surface: The subfloor should be level, with a maximum variation of 1/8 inch over a 10-foot span. Uneven subfloors can cause the backer board to crack or result in an uneven tile installation.
- Adequate support: Wooden subfloors should be adequately supported, minimizing the potential for excessive movement. The spacing between the subfloor joists should follow industry standards to prevent flexing and bending.
Installation Process
Here is a step-by-step guide to installing backer board on a wooden subfloor:
Step 1: Preparation
- Thoroughly clean the subfloor, removing any dirt, debris, or loose material.
- Ensure the wooden subfloor meets the requirements mentioned earlier: structurally sound, level, and adequately supported.
- Measure and cut the backer board to fit the installation area. Leave a small gap around the perimeter to accommodate for expansion.
Step 2: Applying Adhesive
- Apply a layer of thin-set adhesive to the subfloor using a trowel. Ensure the adhesive is evenly spread and covers the entire surface.
- Press the backer board firmly onto the adhesive, ensuring it adheres properly. Use screws or nails to secure the backer board, following manufacturer guidelines for spacing.
Step 3: Sealing the Joints
- Once the backer board is installed and secured, seal the joints with a mesh tape. Apply a layer of thin-set adhesive over the tape, embedding it to create a watertight seal.
- Allow the adhesive to dry according to the manufacturer’s recommended time.
Installing backer board on a wooden subfloor is possible and recommended for tile installations. Backer board provides stability, moisture control, and ease of installation. However, it is essential to ensure that the wooden subfloor meets specific requirements in terms of structural integrity, surface levelness, and adequate support. Following the proper installation process, including preparation, adhesive application, and joint sealing, will result in a successful and long-lasting tile installation.