HardieBacker HydroDefense Waterproof Fiber Cement Backer Board (3-ft x 5-ft x 0.42-in)

A 100% waterproof fiber cement backer board engineered for tile installations in wet areas. The HydroDefense composition provides strong tile adhesion, mold protection, and time-saving installation by only requiring waterproofing at joints and fasteners.

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Key Features:

• Waterproof Composition: Fully waterproof through the board for reliable protection in showers and kitchens
• Strong, Stable Base: Fiber cement construction delivers unmatched strength and excellent tile adhesion
• Mold Protection: Formulated with MoldBlock Technology to resist mold and mildew growth
• Easy to Work With: Cuts clean with minimal dust; score-and-snap capable
• Time-Saving Install: Only waterproof the joints and fasteners—no full-surface coating required

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Specifications Table:

Specification	Details
Series Name	HardieBacker with HydroDefense Technology
Actual Length (Inches)	60
Actual Width (Inches)	36
Actual Thickness (Inches)	0.42
Common Measurement (W x L)	3-ft x 5-ft
Common Thickness in Inches	1/2-in
Material	Fiber cement
Waterproof	Yes
Water Resistant	No
Number of Sheets	1
Sold As	Sheet
Coverage Area (sq ft)	15
For Use with Bathroom Floors	Yes
For Use with Bathroom Walls	Yes
For Use with Fireplace Exteriors	No
For Use with Garage Floors	No
For Use with Garage Walls	Yes
For Use with Kitchen Backsplashes	Yes
For Use with Kitchen Counters	Yes
For Use with Patios	No
For Use with Pools	No
For Use with Shower Floors	No
For Use with Shower Walls	Yes
For Use with Vinyl Floors	Yes
ANSI A118.9 Compliant	Yes
ASTM C1288 Compliant	Yes
Warranty	Limited lifetime
CA Residents: Prop 65 Warning(s)	Yes
UNSPSC	30161500

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Frequently Asked Questions (FAQ):

Q: Is this board truly waterproof?
A: Yes. It is 100% waterproof throughout the board and passes ANSI A118.10 waterproofness.

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Q: Where can I use it?
A: Ideal for shower walls, bathroom walls, backsplashes, countertops, and other interior wet areas; not for shower pans or pools.

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Q: Do I need to apply a waterproof membrane over the entire surface?
A: No. Waterproof the joints and fasteners only; follow local codes for special areas like shower pans.

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Q: How do I cut and install it?
A: Use score-and-snap or power tools; fasten per manufacturer instructions and seal joints with mesh tape and thinset.

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Q: What is the board size and thickness?
A: Actual size is 36 in x 60 in with 0.42 in thickness; common size 3-ft x 5-ft, 1/2-in.

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A Luxe, Watertight Canvas for Tile

This backer board becomes the quiet hero behind exquisite tile, offering a seamless, waterproof foundation that elevates every surface. Its uniform, fiber-cement core gives tiles crisp definition and enduring stability. Try it behind hand-crafted subway or geometric mosaics to let the pattern sing while ensuring lasting performance. It’s an essential layer for sophisticated spaces that demand beauty and resilience.

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Choose HardieBacker HydroDefense to streamline your waterproofing and build a tile-ready surface that lasts.