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Cement board is a rigid substrate made of cement and fibers, while the Kerdi waterproofing system is a flexible membrane that provides waterproofing protection. Cement board is used as a base for tile installation, while the Kerdi system is applied over the substrate to prevent water damage. The Kerdi system is more effective at preventing water penetration and is easier to install, but it is also more expensive than cement board.

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4mo ago

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What are the differences between using Kerdi vs cement board for waterproofing in a bathroom renovation project?

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