Design miscommunication is one of the most underestimated risks in glass distribution. Misaligned drawings, unclear scope notes, and undocumented revisions all create conditions ripe for failure. This blog breaks down what goes wrong and how distributors can safeguard against the fallout.
The Incident: Coating Orientation Misunderstood in High-Rise Façade
A glass distributor was contracted to deliver low-E coated IGUs for a downtown tower. The architect’s design called for the coating to face surface #2 for performance and aesthetics. However, a shop drawing note was ambiguously worded, and the coating was mistakenly applied to surface #3.
The error went unnoticed until post-installation inspections revealed excessive glare and lower thermal performance.
Breakdown Points
Shop drawings lacked section detail showing coating orientation
The engineering team relied on internal assumptions instead of confirming with the architect
No field mock-up was reviewed for optical validation
Impact
$190,000 in rework and project delays
Reputational damage with both the architect and GC
Triggered a formal QC audit of all ongoing projects
Corrective Measures
Design Verification Checklist Added to Project Launch
Every project now starts with a checklist focused on performance-critical features such as coating orientation, frit location, and edge treatment.
Cross-Functional Review Before Final Approval
Shop drawings must be reviewed by engineering, sales, and project management—no single owner can approve alone.
Mandatory Mock-Up Review for Custom Coated Units
For high-visibility projects, a physical mock-up review is now required before mass production begins.
Key Takeaway
Design intent is not always design reality. Glass distributors must clarify assumptions early and create collaborative workflows that prevent costly misinterpretations.
