HardieBacker 1/4-in Fiber Cement Backer Board, 4-ft x 8-ft

A durable fiber cement backer board designed for floors and countertops in moisture-prone areas. The 0.25-in thick, 4-ft x 8-ft sheet features MoldBlock technology, is waterproof throughout, and delivers excellent tile adhesion for long-lasting installations.

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Key Features:

• Waterproof Construction: 100% waterproof composition protects the entire board in wet areas
• Mold Protection: MoldBlock technology resists mold and mildew damage
• Easy Cutting & Handling: Score-and-snap design reduces dust and simplifies on-site sizing
• Strong Tile Adhesion: Fiber cement build with Portland cement and sand provides a stable substrate
• Versatile Use: Ideal under tile, vinyl, wood, granite, and other stone on floors and countertops

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Specifications Table:

Specification	Details
Series Name	HardieBacker
Actual Length (Inches)	96
Actual Width (Inches)	48
Actual Thickness (Inches)	0.25
Common Measurement (W x L)	4-ft x 8-ft
Common Thickness in Inches	1/4-in
Weight (lbs.)	63.2
Coverage Area (sq ft)	32
Material	Fiber cement (Portland cement and sand)
Number of Sheets	1
Water Resistant	Yes
Waterproof	Yes
Sold As	Sheet
ANSI A118.9 Compliant	Yes
ASTM C1288 Compliant	Yes
Warranty	Limited lifetime
For Use with Bathroom Floors	Yes
For Use with Kitchen Counters	Yes
For Use with Vinyl Floors	Yes
For Use with Bathroom/Kitchen Walls	No
For Use with Shower Floors	No
For Use with Shower Walls	No
CA Residents: Prop 65 Warning(s)	Yes

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Frequently Asked Questions (FAQ):

Q: Can this board be used on shower walls?
A: No. For shower walls, use HardieBacker with HydroDefense technology or follow local code-approved waterproofing systems.

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Q: How do I cut the board?
A: Use the score-and-snap method with a carbide scoring knife for clean cuts and minimal dust.

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Q: Is additional waterproofing required?
A: Consult local building codes. The board is waterproof throughout, but assemblies may require waterproofing at seams or fasteners.

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Q: What are the exact dimensions?
A: Actual size is 0.25-in thick x 48-in wide x 96-in long; coverage per sheet is 32 sq ft.

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Q: Where is it commonly installed?
A: Floors and countertops in kitchens, bathrooms, laundry rooms, mudrooms, and similar interior spaces.

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A Sleek, Stable Foundation for Luxe Surfaces

This backer board lays the groundwork for impeccably tiled floors and refined stone countertops. Its smooth, grid-marked surface creates crisp lines and a polished base that elevates finishes. Pair it with oversized porcelain or honed marble for a gallery-worthy look in kitchens and baths. A resilient, waterproof core makes it a quiet essential of sophisticated, long-lasting design.

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Build a moisture-proof, rock-solid base for your next tile or stone project—add HardieBacker to your cart today.