ICC-ES AC424
Full Name
ICC-ES AC424 – Acceptance Criteria for Wood-based Exterior Composite Trim Treated with Zinc Borate (ZB) Preservative by a Non-pressure Process
Scope
ICC-ES AC424 outlines the acceptance criteria for wood-based exterior composite trim treated with zinc borate preservative using a non-pressure process. This type of trim is commonly used in building exteriors for aesthetic and protective purposes.
The scope of AC424 likely includes:
- Materials: it specifies the requirements for the wood-based composite material, the zinc borate preservative, and the non-pressure treatment process used, ensuring their suitability and effectiveness for exterior applications.
- Performance: it likely outlines the testing methods and acceptance criteria for evaluating the performance of the treated trim, including its resistance to decay, termites, and weathering.
- Durability: it likely addresses the durability of the treated trim, ensuring it can withstand long-term exposure to environmental conditions without significant degradation.
- Quality control: it likely establishes a quality control program for manufacturers to ensure that the treated trim consistently meets the requirements of the acceptance criteria.
The AC424 acceptance criteria are used by manufacturers to obtain an evaluation report from ICC Evaluation Service (ICC-ES), which demonstrates that their wood-based exterior composite trim complies with the applicable building codes and standards.
Resources
Keywords
wood-based composite trim; zinc borate; preservative; non-pressure treatment; acceptance criteria; exterior trim; decay resistance; termite resistance; weathering; durability; quality control; building code; standard; evaluation report