Installation Guide

Fastwall Stucco Base Concentrate
(Formerly LaHabra Wall Concentrate)
Test Method ICC AC 11 Testing Criteria Results
Accelerated Weathering
ASTM G153 2000 Hours No cracking, checking, crazing, erosion, or chalking.
ASTM G155 2000 Hours No cracking, checking, crazing, erosion, or chalking.
Compressive Strength ASTM C109
28 days 2538 psi
Flexural Strength ASTM C348 No AC 11 Requirement 623 psi
Freeze-Thaw ICC AC 11 10 cycles No cracking, checking or crazing
Transverse Loads ICC AC 11
Allowable design loads Refer to ESR 2564
Drainage ICC AC 11
90% Efficiency required when EPS
is used
Pass. Refer to ICC-ES ER-2564 for listed assemblies
Surface Burning Characteristics ASTM E84
Flame spread <25, Smoke
Developed <450
Flame Spread: 0
Smoke Developed: 0
Fire Resistance ASTM E119 One hour fire resistive rating Pass. Refer to ICC-ES ESR-2564 for listed assemblies
Combustibility
ASTM E136 Noncombustible Material Pass
Multi-Story Fire Evaluation
UBC 17-6
Required for Non-combustible
Construction
Pass. Refer to ICC-ES ESR 2564 for assembly
Radiant Heat Exposure
NFPA 268
Required for Non-combustible
Construction
Pass. Refer to ICC-ES ESR 2564 for assembly
** These are typical laboratory test results but do not constitute a specification.
DESCRIPTION:
n A fiber reinforced stucco base concentrate
n Factory prepared mixture of portland cement,
fibers, and proprietary ingredients
n Specified sand is added at the job site
n Can be installed 3/8-1/2 in. (9.5-12.7mm) thick in
one application
n Color: Gray
USES:
Stucco Base over:
n Concrete
n Masonry
n Metal lath
Lath is applied over:
n Appropriate water resistive barrier over continuous
sheathing
n Expanded polystyrene (EPS). Per LaHabra
Specification and Application Guide. (Not
for Interior)
COMPOSITION:
n Binder: Portland cement
n Synthetic fibers
n Mineral and organic additives (add specified sand
at job site)
MATERIAL STANDARDS:
Cement: ASTM C150
Lime: ASTM C206
Fibers: ASTM C1116
PROPERTIES:
Meets code criteria for exterior cementitious coating.
ICC-ES Report ESR-2564 includes 1 hour fire-resistive
assemblies.
COVERAGE:
Depending on the condition of the substrate,
thickness of application, and amount of sand added
approximate coverages per bag are:
n at 3/8 in. (9.5mm): 75-90 ft
2
(6.97-8.36 m
2
)
n at 1/2 in. (12.7mm): 60-72 ft
2
(5.57-6.69 m
2
)
n Coverage may vary due to ambient temperature,
surface temperature, surface porosity, mixing
methods, application methods, amount of water,
wall type and metal lath type. Coverage must be
verified in the field using the same procedures and
conditions that will be present at the project.
CONTAINER:
80 lb (36 kg) net weight in a moisture resistant bag.
n Storage: Store off ground and protect from rain
and moisture
n Shelf Life: 12 months if protected from sun,
freezing and moisture
WORkING TIME:
Sets in 30-45 minutes after mixing, depending
on conditions.
SURFACE PREPARATION:
n On masonry and concrete, apply only to surfaces
that are sound, clean, dry, unpainted, and free
of any residue which may affect the ability of
LaHabra Fastwall Stucco Base to bond to the
surface.
n Solid bases shall have sufficient suction (ability
to absorb water) or surface roughness or both to
ensure an adequate bond for LaHabra Fastwall
Stucco Base.
n On lathed construction, apply to lathing installed
in accordance with ASTM C1063.
n LaHabra Fastwall Stucco Base requires water-
resistive barrier installed and flashed in accordance
with building code and to form a water-shedding
surface. Stucco is not a water-resistive barrier.
n Install water-resistive barrier (type and method
of application) per Parex USA Stucco Application
Guide or Specifications.
n Do not apply to substrates which are frozen or
contain frost or ice.
n Apply to surface prepared as for portland cement
plaster.
n For additional surface preparation options, contact
Parex USA Technical Support.
MIXING INSTRUCTIONS:
n Use clean equipment for mixing and preparation.
n Start with approximately 3 gal (11.35 L) of clean
potable water. And approximately 60 lbs. (27.2
kg) of the sand. Add 1 bag of LaHabra Fastwall
Stucco Base Concentrate. Add remaining sand
along with additional water- approximately 1-3 gal
(3.8-11.35 L) for workability. Total amount of sand
equals 2 ½ - 3 cubic ft (200-240 lbs or 91-109
kg). Allow the material to slake then break set. If
needed, add water for workability.
n Use cool, potable water; let hose run to clear it of
hot water.
n Sand: Sample and test in accordance with ASTM
C897 or C144, and grade within the following
limits: