I'm tearing out the old tiles in my shower and found this thick pink board behind them, sitting on top of concrete blocks. It's pretty easy to chip away, much more so than plaster or concrete. Does anyone know what this material is?
2 Answers
Looks like it could be Schluter board! It's designed to create a waterproof barrier for tile installations. If that's the case, you're on the right track for a solid shower setup.
That pink board could be XPS insulation, which is often used in bathrooms for waterproofing. It's lightweight and helps provide some thermal insulation as well. You might want to check if it's part of a larger system that usually goes under tiles to protect from moisture.
Yeah, I've seen that stuff before. It's great for preventing moisture issues, especially in humid areas like showers.
Good catch! Schluter boards are really effective for keeping water from damaging the walls behind tile.