Use and Care Manual

DESCRIPTION
HardieBacker
®
cement board offers architects, builders, and contractors a unique cement based
backer board that can be used on walls, floors, ceilings and countertops. Its formulation resists damage
from moisture while providing the ideal combination of strength, uniform composition and performance
that no other backer board can provide.
BASIC COMPOSITION
90% Portland cement and sand; 10% cellulose fiber and selected additives. HardieBacker cement board
does not contain asbestos, gypsum, glass fiber, or added formaldehyde.
TECHNICAL DATA SHEET
RECOGNITIONS
HardieBacker cement board is recognized
as interior substrates according to the
following:
• International Code Council Evaluation
Service ESR-2280
• ANSI A108.11 Specifications for Interior
Installations of Cementitious Backer
Units
• HUD Materials Release Nos.
1263 and 1268
• IBC 2509.2
• IRC R702.4.2
ENVIRONMENTAL
CONSIDERATIONS
James Hardie has demonstrated a
commitment to reducing energy
consumption, while improving process
efficiencies and waste management.
It avoids the use of environmentally
damaging materials and uses abundant,
renewable resources in the manufacture
of HardieBacker cement board.
The company also focuses on water
conservation and recycle water and waste
product as much as possible during the
manufacturing process. Because of this
and its formulation, HardieBacker cement
board is eligible for LEED points and is UL
GREENGUARD Gold certified.
HEALTH AND SAFETY
James Hardie
®
fiber cement products
contain crystalline silica. During installation,
we recommend using the score and snap
technique or a fiber cement electric shear
to cut HardieBacker products. During clean
up, use HEPA vacuums or wet cleanup
methods. For additional information visit
jhsafesite.com or view the material safety
data sheet (MSDS) at hardiebacker.com
GENERAL PROPERTY TEST METHOD
UNIT OR
CHARACTERISTIC
HARDIEBACKER
®
1/4 IN CEMENT
BOARD
HARDIEBACKER
®
500 CEMENT
BOARD
Nominal Dimensions ASTM C1288
Width 3 ft 4 ft 3 ft 4 ft
Length
5 ft 8 ft 5 ft 8 ft
Thickness 1/4 in 13/32 (0.42) in
Weight lbs per sq ft 1.9 2.6
Compressive Strength ASTM D2394 psi 7,000 6,500
Flexural Strength ASTM C947 psi 2,100 1,700
PHYSICAL
ATTRIBUTES
Freeze/Thaw Resistance
ASTM C666
(Proceedure B)
Type A
Pass/Fail Not Tested Pass
Warm Water ASTM C1288 Pass/Fail Pass Pass
Water Vapor Transmission
ASTM E96
(Desiccant Method)
Perms 1.75 perms 2.84 perms
Standard Method for
Evaluating Ceramic Floor Tile
Installation Systems
ASTM C627 passes cycles 1-6 Light-Commercial Light-Commercial
PERFORMANCE
Noncombustibiblity ASTM E136 Pass/Fail Pass Pass
Surface-Burning
Characteristics
ASTM E84
Flame Spred Index/
Smoke Developed Index
0/5 or less 0/5 or less
Fire-resistance Rate
Construction
ASTM E119
1 Hour Designs Available see Backside or
Consult James Hardie for E119 Listings
FIRE
Shear Bond Strength
(saturated)
ASTM C1288 /
ANSI A118.1
Dry-Set Portland
Cement Mortar
Pass Pass
Shear Bond Strength
ASTM C1288 /
ANSI A118.4
Latex-Portland
Cement Mortar
Pass Pass
Shear Bond Strength
ASTM C1288 /
ANSI A136.1
Organic Adhesives
Type 1
Pass Pass
WEIGHT
CAPACITY
Coefficient of Thermal
Conductivity
ASTM C177 K-value
7.80 Btu / (ft2 x
h x ºF)
20.07 Btu / (ft2 x
h x ºF)
Coefficient of Thermal
Resistance
ASTM C177 R-value
.13 ft^ 2 x h x F/
Btu
0.05 ft^ 2 x h x
F/ Btu
THERMAL