ICC-ES AC378

Full Name

ICC-ES AC378 – Acceptance Criteria for Fiber-cement Interior Substrate Sheets Used in Wet and Dry Areas

Scope

ICC-ES AC378 outlines the acceptance criteria for fiber-cement interior substrate sheets used in wet and dry areas of buildings. These sheets are typically used as a backing material for tile, stone, or other finishes in bathrooms, kitchens, and other areas where moisture resistance is important. The scope of AC378 includes:
  • Material properties: it specifies the requirements for fiber-cement interior substrate sheets, including their composition, dimensions, physical properties (such as density and thickness), and performance characteristics (such as flexural strength, moisture resistance, and mold resistance).
  • Testing procedures: it details the standardized testing methods for evaluating the physical and performance properties of fiber-cement substrate sheets, including tests for flexural strength, water absorption, dimensional stability, and mold growth.
  • Installation requirements: it provides guidelines for the proper installation of fiber-cement substrate sheets in both wet and dry areas, ensuring adequate support, fastening, and sealing to prevent moisture intrusion.
  • Evaluation and certification: it outlines the process for evaluating and certifying fiber-cement substrate sheets to ensure they comply with the acceptance criteria and can be safely used in construction.
ICC-ES AC378 is essential for manufacturers to demonstrate that their fiber-cement substrate sheets meet the required performance and safety standards for use in wet and dry areas. It also assists builders, designers, and homeowners in selecting appropriate substrate materials for various interior applications.

Resources

Keywords

fiber-cement; substrate sheets; acceptance criteria; wet areas; dry areas; flexural strength; water absorption; dimensional stability; mold resistance; testing; installation; evaluation; certification