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Foam board panels
Foam board panels are waterproof foam substrates that serve as both tile backer and moisture barrier in a single product.
Why it matters
They simplify shower construction by eliminating the need for a separate waterproofing membrane over cement board.
Where people get this wrong
Foam board panels are not styrofoam. They are engineered construction panels designed to bear tile weight and block moisture.
Real-world example
The installer bonds foam board panels directly to the shower studs, then tiles over them. No separate membrane step is needed.
Where this hits your build
This hits during the selection phase. Choices here affect layout, daily use, and maintenance. Samples and measurements matter more than catalog photos.
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