Shower wall panels are typically installed to protect the underlying structure from water damage and provide an aesthetically pleasing surface. What you put behind shower wall panels depends on the construction and design of the shower, but here are some common options:
Backer Board or Cement Board: Backer board, also known as cement board, is a water-resistant material often used as a substrate for shower wall panels. It is made of cement and reinforcing fibers, making it an excellent choice for wet areas like bathrooms. Backer board provides a stable and flat surface for the shower wall panels to adhere to.
Waterproof Membrane: In addition to backer board, a waterproof membrane may be applied to the surface to further protect against water infiltration. This membrane acts as a barrier to prevent water from seeping through to the underlying structure.
Drywall or Plywood: In some cases, especially in older constructions, you may find drywall or plywood behind shower wall panels. While these materials are not inherently waterproof, they can be treated with waterproofing agents to improve their resistance to moisture.
Moisture-Resistant Drywall: For more modern construction, moisture-resistant drywall, often known as greenboard or blueboard, may be used behind the shower wall panels. This type of drywall has a special moisture-resistant core that makes it more suitable for areas prone to humidity and occasional water exposure.
Framing Studs: Behind all the above-mentioned materials, there will be framing studs forming the structural support for the shower walls. The panels are attached to these studs to create a stable and secure wall surface.
Remember, it is crucial to ensure that the shower wall's underlying structure is properly waterproofed and that any seams or joints are adequately sealed to prevent water damage and mold growth. If you are unsure about the best materials to use for your specific shower project, it is always advisable to consult a professional contractor or bathroom renovation expert.