At Duxton, we are committed to providing products that meet the highest standards of quality and performance. To ensure consistency across all projects, we follow the Cardinal Glass Inspection Reference, which outlines the industry-approved criteria for evaluating insulated glass units. These inspection guidelines are based on ASTM standards and cover:

• Viewing conditions – proper lighting, distance, and angle for accurate evaluation
• Allowable blemishes – specific size, type, and frequency of imperfections acceptable in glass
• Central vs. outer areas – different criteria for blemishes depending on where they appear
• Observation durations – standardized inspection times based on glass size

By adhering to these criteria, we ensure that every unit we deliver meets or exceeds industry expectations. Dealers can have confidence that our products are inspected under rigorous, uniform standards—providing clarity, quality, and reliability for every project