Uniform Evaluation Services is built upon an 90-year-old foundation of experience, expertise and quality. Uniform ES is accredited by the American National Standards Institute (ANSI) per the ISO/IEC Guide 17065, General Requirements for Bodies Operating Product Certification Systems. This means that building products, materials and designs bearing the Uniform ES mark of conformity are trusted for their conformity and workmanship by contractors, inspectors, architects, engineers, officials and Authorities Having Jurisdiction.