Can You Put Plywood Over Tiles In Shower

Can You Put Plywood Over Tiles in a Shower?

The idea of covering existing shower tiles with plywood might seem appealing, especially if you're looking for a cost-effective way to renovate your bathroom. Plywood offers a flat, stable surface that can be easily painted or tiled, providing a fresh look to your shower area. However, before embarking on this project, it's crucial to understand the complexities and potential drawbacks of installing plywood over shower tiles.

While seemingly straightforward, this approach presents several challenges. The primary concern is moisture, which is a constant presence in shower environments. Plywood, although a durable material, is susceptible to water damage, leading to warping, rotting, and mold growth. This can compromise the structural integrity of the shower and create health hazards. Additionally, the uneven surface of existing tiles can make it difficult to achieve a smooth and even plywood layer.

Understanding the Risks

The most significant risk associated with placing plywood over shower tiles is moisture penetration. Tile grout, despite its waterproof properties, can still allow water to seep through, especially in older showers with cracked or damaged grout. This moisture can penetrate the plywood, leading to various problems:

Warping and Rotting: Plywood, even when treated, is not designed to withstand prolonged exposure to moisture. It will swell, warp, and eventually rot, creating an unsafe and unsightly shower area.
Mold Growth: Damp plywood provides a breeding ground for mold, which can release harmful spores into the air. This poses serious health risks, particularly for individuals with respiratory problems or allergies.
Structural Instability: Rotting plywood weakens the shower structure, potentially leading to collapses or accidents.

Alternative Solutions

Instead of attempting to install plywood over existing shower tiles, consider these alternative solutions that prioritize safety and longevity:

Regrouting and Sealing: If the problem is simply cracked grout, consider regrouting and sealing the existing tiles. This can effectively prevent water from seeping through and protect the underlying structure.
Tile Over Tile Installation: Applying a new layer of tile over the existing ones can provide a fresh look while maintaining a water-resistant barrier. This method requires careful preparation, including ensuring a flat and stable surface and using a waterproof adhesive.
Complete Shower Remodel: If the shower is beyond repair, a complete remodel offers the most comprehensive solution. This involves removing the existing shower, replacing damaged components like the subfloor, and installing a new, water-resistant shower system.

Factors to Consider

Before making a decision, carefully consider these factors to ensure the best outcome for your shower renovation:

Age and Condition of the Existing Tiles and Grout: If tiles are cracked, loose, or the grout is significantly damaged, a complete remodel might be the only viable option.
Budget: Regrouting and sealing are generally the most affordable options, while a complete remodel is the most expensive.
Personal Preference: Consider your aesthetic preferences and desired style for your shower. If you want a completely new look, a complete remodel might be the best choice.

Ultimately, the decision of whether or not to put plywood over shower tiles depends on a careful assessment of the risks and benefits involved. Prioritize safety and longevity, and choose the solution that best addresses your specific needs and budget.