HardieBacker 1/4" Cement Board

HardieBacker 1/4" Cement Board

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HardieBacker 1/4" Cement Board

Product Description

HardieBacker 1/4'' board for floors and countertops is America´s best selling 1/4'' board. Produced with James Hardie´s proprietary cement formulation, this no-mesh board is the lightest cement board available and cuts easily, even in tight, awkward spaces. HardieBacker board is available in a 3´x 5´ size which features the exclusive EZ Grid® recessed fastener pattern to make installation even easier. HardieBacker board provides superior protection against moisture damage and mold growth and is backed by a limited lifetime product warranty.

90% Portland cement and ground sand. HardieBacker™ board contains no asbestos, glass mesh, formaldehyde, or gypsum.

  • 1/4" Sheet Size
  • 3'x 5' (EZ Grid® board with recessed fastener pattern)
  • Thickness: 1/4" 
  • Weight: 1.9 lbs/sq.ft. 

Mold Resistance
HardieBacker products achieve a perfect score on both industry standard mold tests. HardieBacker board scores a 0 (best possible score) on the ASTM G21 for mold resistance and a 10 (best possible score) on the ASTM D3273 test against mold growth.

Flexural Strength
Based on typical Equilibrium Moisture Content: 2100 psi when tested in accordance with ASTM test method C1185. 

HardieBacker™ cement board is recognized for use in non-combustible construction in NER-405.

Surface Burning Characteristics
When tested in accordance with ASTM test method E-84:

  • Flame Spread: 0
  • Fuel Contributed: 0
  • Smoke Developed: 5

Thermal Resistance

  • (Approximate value) 1/4'' thick: R:0.13

Product Specifications

SKU: har_3
Manufacturer: James Hardie
Warranty: Limited Lifetime Warranty

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