ICC-ES AC456

Full Name

ICC-ES AC456 – Acceptance Criteria for Fire-protective Coatings Applied to Spray-applied Foam Plastic Insulation Installed without a Code-prescribed Thermal Barrier

Scope

ICC-ES AC456 establishes the acceptance criteria for fire-protective coatings applied to spray-applied foam plastic insulation (SPF) in situations where a code-prescribed thermal barrier is not used. These coatings are designed to enhance the fire performance of SPF and mitigate the potential fire hazards associated with exposed foam.

The scope of AC456 includes:

  • Product evaluation: it provides guidelines for evaluating the suitability and effectiveness of fire-protective coatings for use with SPF.
  • Performance requirements: it specifies minimum performance criteria that fire-protective coatings must meet, including flame spread, smoke development, and resistance to thermal degradation.
  • Testing procedures: it outlines the standard test methods to assess the fire performance of coated SPF assemblies, including small-scale and large-scale tests.
  • Application requirements: it provides guidance on the proper application of fire-protective coatings to ensure adequate coverage and thickness.
  • Quality control: it requires manufacturers to have quality control programs to ensure consistent product quality and adherence to the acceptance criteria.

By adhering to AC456, manufacturers and installers can ensure that fire-protective coatings used with SPF meet the necessary fire performance requirements and contribute to the overall fire safety of buildings.

Resources

Keywords

acceptance criteria; fire-protective coatings; spray-applied foam plastic insulation; thermal barrier; flame spread; smoke development; thermal degradation; small-scale test; large-scale test