Engineered Wood Siding & Trim

CPA’s Engineered Wood Siding and Trim Grademark Certification Program (EWST Program) provides independent, accredited, certification of physical and mechanical properties to demonstrate compliant, reliable, quality products. Requirements for qualification including plant quality control procedures, independent product testing, and periodic inspections by CPA – all reasonably assure that EWST products meet the performance and manufacturing requirements of applicable standards, regulations, and code requirements.

These standards include:

  • ANSI A135.6 Engineered Wood Siding
  • ANSI A135.7 Engineered Wood Trim

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For a list of Engineered Wood Siding and Trim companies, visit our Product Finder.

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