When it comes to installing tile, the proper subfloor or underlayment is crucial to ensure a durable and long-lasting installation. Plywood underlayment is a common choice for many homeowners, as it provides a smooth and stable surface for tile installation. However, some may wonder if it is possible to install tile directly over plywood underlayment. In this article, we will explore this question and provide a detailed answer.
Understanding Plywood Underlayment
Before delving into the feasibility of installing tile directly over plywood underlayment, it’s important to understand what plywood underlayment is and its purpose. Plywood underlayment refers to a thin layer of plywood that is typically used to create a smooth and level surface for a finished floor to be installed on top.
Plywood underlayment is usually around 1/4 inch thick and provides added stability to the subfloor. It helps to prevent the tile from cracking and shifting by absorbing some of the stress caused by the natural movement of the floor. Furthermore, plywood underlayment can also act as a moisture barrier, protecting the tile from damage caused by moisture seeping through the subfloor.
In most cases, it is not recommended to install tile directly over plywood underlayment. This is because plywood underlayment alone does not provide the necessary strength and stability to support the weight of the tile and withstand its constant use. Over time, the grout lines may crack, and the tiles may become loose or even break.
The primary reason for this is the inherent flexibility of plywood. Unlike other types of underlayment, such as cement board or uncoupling membranes, plywood is more prone to movement and flexing. It can expand and contract with changes in temperature and humidity, which can ultimately compromise the integrity of the tile installation.
A Suitable Alternative: Cement Board
Instead of installing tile directly over plywood underlayment, a more suitable alternative is to install a cement board over the plywood first. Cement board is a rigid and durable material that provides excellent stability and support for tile installations.
First, ensure that the plywood underlayment is structurally sound and free from any signs of damage or deterioration. Next, lay a layer of thin-set mortar over the plywood surface, using a trowel to spread it evenly. Then, place the cement board over the mortar and secure it to the plywood using screws or nails specifically designed for this purpose. Be sure to follow the manufacturer’s instructions for the correct spacing and placement of fasteners.
Once the cement board is securely in place, it is then possible to proceed with the tile installation. Apply a layer of thin-set mortar or adhesive to the cement board and press the tiles into place, ensuring proper spacing between each tile. Once the mortar is cured, grout the tiles and allow them to dry.
The Benefits of Using Cement Board
Using cement board over plywood underlayment offers several advantages. Firstly, it creates a stable and level surface for tile installation, minimizing the risk of cracking or shifting. Cement board is also moisture-resistant, which is crucial in areas with high humidity or moisture exposure, such as bathrooms or kitchens. Additionally, it provides a solid base for tile adhesion, ensuring a long-lasting and durable tile installation.
While plywood underlayment can provide a smooth surface for tile installation, it is not recommended to install tile directly over it. Instead, opt for the more suitable alternative of using cement board as a stable and durable subfloor. By following proper installation techniques and using the appropriate materials, you can ensure a successful and long-lasting tile installation that will withstand the test of time.