What is Kerdi board for showers?

Kerdi board is a waterproof tile backer board made by Schluter Systems that's specifically designed for shower applications. It's a foam core board with a waterproof membrane already bonded to both sides, eliminating the need for separate waterproofing steps.

Kerdi board combines structural support and waterproofing in one product. The foam core provides excellent insulation and is lightweight, while the bonded Kerdi membrane creates a completely waterproof barrier. This makes it ideal for shower walls, niches, and even shower floors when properly installed. Unlike traditional cement board that requires separate waterproofing membranes, Kerdi board comes ready to tile directly.

In Ottawa's climate, Kerdi board offers significant advantages over traditional methods. The integrated waterproofing eliminates potential failure points where separate membranes might be compromised. It's particularly valuable in basement bathrooms where moisture control is critical, and the insulation properties help prevent condensation issues common in our cold winters.

Installation requires specific Schluter accessories and techniques. Joints are sealed with Kerdi band and Kerdi fix sealant, and corners use pre-formed Kerdi corners. The system includes matching drains, niches, and trim pieces that integrate seamlessly. While more expensive than cement board initially, it can save time and prevent costly water damage repairs.

Kerdi board typically costs $4-6 per square foot compared to $1-2 for cement board plus waterproofing. However, the integrated system often reduces labor costs and provides superior long-term protection. Professional installation ensures proper sealing at all joints and penetrations, which is critical for the system's effectiveness.

For a waterproof shower renovation using Kerdi board systems, Ottawa Bathrooms can provide a detailed estimate based on your specific project requirements.