ICC-ES AC275
Full Name
ICC-ES AC275 – Acceptance Criteria for Glass Fiber Lath Used in Cementitious Exterior Wall Coatings or Exterior Cement Plaster (Stucco)
Scope
ICC-ES AC275 establishes the acceptance criteria for evaluating glass fiber lath used as a reinforcement in cementitious exterior wall coatings or exterior cement plaster (stucco), including stucco intended to support precast stone veneer.
The scope of AC275 includes:
- Materials: specifications for the glass fiber lath material, including its composition, weight, and physical properties like tensile strength and alkaline resistance.
- Performance testing: standardized test methods for evaluating the lath’s resistance to cracking, delamination, and deterioration under simulated weathering conditions.
- Installation: guidelines for the proper installation of the lath, including attachment methods and overlap requirements.
- Compatibility: evaluation of the lath’s compatibility with various types of cementitious coatings and stucco systems.
By adhering to AC275, manufacturers can ensure that their glass fiber lath products meet the necessary standards for performance and durability in exterior wall applications.
Resources
Keywords
acceptance criteria; alkali resistance; cementitious coating; cracking; delamination; exterior cement plaster; exterior wall coating; glass fiber lath; installation; lath; performance testing; physical properties; stucco; tensile strength; weathering