When it comes to tiling a floor, using backerboard is a popular choice to create a smooth, level surface for tile installation. However, one question that often arises is whether it is possible to install backerboard directly over existing flooring. In this article, we will explore this topic in detail, discussing the benefits and drawbacks of this approach, as well as providing step-by-step instructions for the installation process.
Benefits of Installing Backerboard Over Existing Flooring
There are several advantages to installing backerboard over existing flooring:
- Saves Time and Effort: One of the primary benefits of this method is that it saves time and effort by eliminating the need to remove the existing flooring. Removing old flooring can be a tedious and time-consuming process, especially if the current floor is glued or nailed down.
- Provides Added Stability: By installing backerboard over existing flooring, you are adding another layer of stability to the overall structure. This is particularly helpful if the original flooring is uneven or damaged. The backerboard acts as a solid foundation for the tile to be laid upon.
- Waterproofing: Backerboard materials, such as cement or fiber-cement board, are moisture-resistant and provide an additional layer of waterproofing. This is especially beneficial in bathrooms or other areas where moisture is a concern.
Drawbacks of Installing Backerboard Over Existing Flooring
While there are advantages to installing backerboard over existing flooring, it’s important to consider the drawbacks as well:
- Increased Height: Adding backerboard over existing flooring will increase the height of the floor. This can lead to potential issues, especially when transitioning to adjacent rooms or if the doorway is too low. It may require adjustments to door frames or trim work to accommodate the taller flooring.
- Reduced Headroom: If you are installing backerboard in a space with limited headroom, such as a basement or attic, the added height can further reduce the available space. This should be taken into account when planning the overall project.
Step-by-Step Installation Process
If you have considered the benefits and drawbacks and have decided to proceed with installing backerboard over existing flooring, here is a step-by-step guide:
- Preparation: Before starting the installation, ensure that the existing flooring is clean and free from any debris or adhesive residue. Sweep or vacuum the floor thoroughly.
- Leveling the Floor: If the existing flooring is uneven, use a leveling compound to even out the surface. Follow the manufacturer’s instructions for the leveling compound and allow it to dry completely.
- Measuring and Cutting Backerboard: Measure the dimensions of the area where you plan to install the backerboard and transfer the measurements to the backerboard sheets. Cut the backerboard to size using a utility knife.
- Dry Fit: Place the cut backerboard pieces over the existing flooring to ensure a proper fit. Make any necessary adjustments.
- Securing Backerboard: Apply a layer of thin-set mortar to the existing flooring using a trowel. Place the backerboard pieces on top of the mortar and secure them by screwing them down with backerboard screws. Follow the manufacturer’s instructions for the recommended spacing of the screws.
- Tape and Apply Thin-Set Mortar: Apply a layer of thin-set mortar over the seams between the backerboard pieces. Place backerboard tape over the seams and embed it in the mortar.
- Allow to Cure: Allow the thin-set mortar to cure for the recommended time as specified by the manufacturer. This usually takes around 24 hours.
- Tile Installation: Once the backerboard is fully cured, you can proceed with your tile installation following the manufacturer’s instructions.
While installing backerboard over existing flooring is possible, it is essential to consider both the benefits and drawbacks before embarking on the project. Assess the current condition of the flooring, the height restrictions, and the overall feasibility of the installation. By following the step-by-step guide provided, you can ensure a successful installation of backerboard over existing flooring, creating a sturdy foundation for your tile.