There are several options for solid surface shower surfaces, but moisture resistant plywood, drywall, or cement backer board are usually the best choices. Finishing methods range from using greenboard or cement backer board alone to installing a waterproof membrane for added protection. Ultimately, your choice will depend on your budget, moisture content, and the durability you require, but some people choose to rely solely on solid surface materials for waterproofing.

Thanks for all your comments. We ended up using DensShield.

For solid surface showers, moisture resistant plywood, moisture resistant gypsum board, or cement backer board are recommended. Cement backer board is often preferred due to its durability and moisture resistance. Finishing typically includes making sure seams, especially corners and joints, are properly sealed with a waterproof membrane. This prevents water infiltration and ensures a stable base for solid surface installations, maintaining the integrity and performance of the shower wall over time.

A solid surface shower substrate provides a durable, waterproof, and seamless base for showers, preventing leaks and ensuring longevity. Its non-porous nature resists mold, stains, and moisture, making it a low-maintenance and stylish choice for modern bathrooms.

A Solid Surface Shower Substrate is a durable, seamless, and water-resistant base made from composite materials for modern, low-maintenance bathrooms. It offers a smooth, grout-free finish that’s easy to clean and designed to last for years without cracking or staining.