Yes, it is possible to use plywood as a base under a bathroom vanity instead of placing it directly on the floor. In fact, using plywood as a base can offer a few advantages:
Leveling: If your bathroom floor is uneven or has imperfections, using plywood as a base can help create a level and stable surface for the vanity. This is especially important for ensuring that the vanity remains stable and doesn't wobble.
Moisture Protection: Bathrooms are typically exposed to moisture, and using plywood as a base can provide some protection against water damage. Plywood is resistant to moisture to some extent, and it can act as a barrier between the vanity and the floor, reducing the risk of water damage to the vanity.
Ease of Installation: Using plywood as a base can make the installation process easier and more straightforward. You can cut the plywood to the desired size and shape, ensuring it fits perfectly under the vanity. Additionally, you can secure the vanity to the plywood base using screws, providing a stable and secure attachment.
However, it's important to consider a few points when using plywood as a base for a bathroom vanity:
Choose the Right Plywood: Select plywood that is suitable for wet environments, such as marine-grade or exterior-grade plywood. These types of plywood are designed to withstand moisture exposure better than standard plywood.
Protect the Plywood: Apply a waterproofing or sealing product to the plywood to enhance its resistance to moisture. This can help prolong its lifespan and reduce the risk of water damage.
Adequate Ventilation: Ensure that there is proper ventilation around the plywood base to allow any potential moisture to evaporate. Proper airflow can help prevent the buildup of mold or mildew.
Follow Local Building Codes: Check your local building codes and regulations to ensure that using plywood as a base is compliant with the requirements for bathroom installations.
It's also worth mentioning that if your bathroom floor is already level and moisture-resistant, and you're using a pre-made vanity with its own base or adjustable feet, you may not necessarily need to use plywood as a base. In such cases, following the manufacturer's instructions for installation would be sufficient.