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Description:
A fiber-reinforced stucco base concentrate. Also available factory-sanded. See separate literature.
- Factory blended mixture of portland cement, synthetic fibers, and proprietary ingredients.
- Specified sand is added at the job site (LaHabra Fastwall® concentrate only).
- Can be installed 3/8-1/2" (10-12.7mm) thick in one application.
Uses:
As a stucco base, apply LaHabra Fastwall® over:
- Masonry surfaces, metal lath or stucco netting.
- Lath or stucco netting is applied over:
- Building paper with continuous sheathing.
- EPS applied over building paper
Composition:
- Binder: Portland cement, fibers and proprietary ingredients for workability and curing.
- LaHabra Fastwall® Concentrate: Add specified sand (ASTM C 897 or C 144) at job site.
Packaging:
Packed as a concentrate in 80lb. (36.3kg.) bags.
Storage:
Shelf life: six (6) months if properly stored and kept dry.
Coverage:
One 80 lb. (36.3kg.) bag of LaHabra Fastwall® concentrate covers approximately 8-10 sq. yd. (6.7-8.4m2) at 3/8 inch (10mm) thickness.
Job Procedure
A. Surface Preparation:
- On masonry surfaces, apply only to those surfaces that are sound, clean, dry, unpainted, and free of any residue which may affect the ability of LaHabra Fastwall® to bond to the surface. Thoroughly dampen surface at time of application. See cautions and limitations.
- Over either wood or steel framing, stud selection, bracing, water-resistive barrier and sheathing must conform to the applicable codes.
- When lath is used, apply according to ASTM C 1063. Cover wood-based sheathings with a minimum of two layers of Grade D building paper. Other approved sheathed substrates require a minimum of one layer of Grade D building paper.
- When using T&G Insulation Board, the tongue & groove board is installed horizontally with the tongue up. Vertical joints shall be staggered and shall overlap a framing member.
- Corner aid, control joints etc. must be attached mechanically through the substrate into a framing member.
- Do not apply to substrates which are frozen or contain frost or ice.
- Apply to surfaces prepared for portland cement plaster.
B. Mixing:
- Use cool, clean potable water; let hose run to clear it of hot water.
- Sand for LaHabra Fastwall® Concentrate: Start with approximately 3 gallons (11.4 liters) of clean potable water. Add approximately 60lb of the ASTM C 897 sand. Add one bag of LaHabra Fastwall®. Add remaining sand along with additional water — approximately 1-3 gallons for workability. Total amount of sand equals 200-240lb (90-110kg). Allow the material to slake then break set. If needed, add water for workability.
- No additives of any kind, such as portland cement, lime, rapid binders, antifreeze, accelerators, etc. should be added under any circumstances.
- A great variety of colors and textures may be obtained by applying LaHabra finishes.
C. Application:
For complete application procedures refer to ICC-ES ESR-2564, NES NER 547.
NOTE: All materials are to be installed by a listed applicator and in compliance with the current manufacturer's specifications and/or Evaluation Report and local building code requirements.
- LaHabra Fastwall® may be sprayed or hand-applied to a minimum thickness of 3/8" on wood or steel studs or a maximum thickness of 1/2".
- LaHabra Fastwall® should be kept moist by water curing within 48 hours after application. During high temperature or dry weather, frequent water application is required.
- Start light fogging after initial set of 1-2 hours.
- Allow LaHabra Fastwall® to cure thoroughly before applying acrylic primers or finishes.
- Texture may be applied as soon as base has set sufficiently to receive it.
NOTE: When a portland cement finish coat is to be applied, the surface must be opened (not smooth) by floating or brushing.
Testing
LaHabra Fastwall® fibered cement plaster has been tested in accordance with the following tests and methods:
| Test |
Method |
| Accelerated
Weathering |
ASTM
G 23 |
| Compressive
Strength |
ASTM
C 109 |
| Transverse
Load |
ANSI/ASTM
E 330 |
| Flame
Spread |
ASTM
E 84 |
| Vertical
Furnace |
ASTM
E 136 |
| 1-Hour
Fire Endurance |
ASTM
E 119 |
| Multi-Story
Fire Evaluation |
UBC 17-6
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| Fire Resistive and Non-Combustible Assemblies |
ICC-ES ESR-2564 |
Material Standards
Portland cement ASTM C-150;
Federal SS-C-1960/3 Type 1
Cautions and Limitations
- LaHabra Fastwall® shall not be applied when temperatures fall below 40°F (4°C) within 48 hours of application.
- LaHabra Fastwall® should not be applied if ambient temperature exceeds 120°F (49°C) within 24 hours of application.
- A suitable bonding agent should be used if a Portland cement finish is not applied within 7 days.
- For very dense or smooth concrete, contact LaHabra Technical Services for additional information.
- See package for handling precautions.
- Always wear proper safety equipment, including particle mask, when mixing or applying this product.
Information contained in this brochure conforms to general recommendations for the installation of LaHabra Fastwall®, and is provided in good faith. ParexLaHabra, Inc. assumes no liability, expressed or implied, as to the
workmanship, engineering or architecture of any project.
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Spec Guide
