Hardie® Backer Board with HydroDefense® Technology

The unmatched strength, ease of use, and excellent tile adhesion you’ve come to expect from Hardie® Backer Board—with a 100% waterproof* composition throughout the board thanks to HydroDefense® Technology.

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Explore Hardie® Backer Board with HydroDefense® Technology

An unmatched combination of strength, performance and protection, our cement backer board is the most preferred brand by tile installers** and is 100% waterproof*.

Explore Hardie® Backer Board with HydroDefense® Technology
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Why choose Hardie® Backer Board with HydroDefense® Technology?

Count on exceptional performance and rock-solid waterproof* protection for your customers, your work, and your reputation.

100% Waterproof*

Helps protect tile installations from the damaging effects of water thanks to 100% waterproof* composition throughout the cement board.

Superior strength

Unmatched compressive and flexural strength offers up to 3 times the compressive strength of competitors, offering greater protection against cracked mortar or tile.

Mold & mildew resistance

MoldBlock® Technology protects the board from mold and mildew growth.

Hardie® Backer Board with HydroDefense® Technology Tech Specs and Documents

Learn everything you need to know about installing Hardie® Backer Board with HydroDefense® Technology.

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Installation Instructions

View instructions for installing Hardie® Backer Board with HydroDefense® Technology. In English and Spanish.

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How to Install Hardie® Backer Board with HydroDefense® Technology

Learn how to install Hardie® Backer Board with HydroDefense® Technology waterproof* cement board and the appropriate materials and tools that you’ll need for the job.

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Browse tech docs library

Quickly browse the installation guidance and technical documentation you'll need for a successful install project.

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Find a dealer near you.

Find Hardie® fiber cement siding and trim, weather barrier products, and backer board near you.

*Passes ANSI A118.10 waterproofness. Some application areas, such as shower pans, may require additional waterproofing. Refer to local building code requirements.
**According to the 2021 Tile and Stone Installation Contractor Market Study conducted by Clear Seas Research in partnership with the NTCA and TILE Magazine.
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