Installation failures are often blamed on labor, but they usually trace back to unclear handoffs, missing details, and gaps in the distribution process. This postmortem review breaks down a costly project failure where several small oversights led to a major breakdown.
The Incident: Glazing Sealant Incompatibility with Glass Coating in Office Tower
A Canadian distributor delivered high-performance coated IGUs for an office tower. During installation, the contractor used a third-party sealant not approved for that specific glass coating. Weeks later, chemical reactions caused visual discoloration and coating delamination.
The root cause? The submittal package didn’t include sealant compatibility data, and the installer defaulted to their usual vendor.
Breakdown Points Identified
No compatibility checklist was shared with the installer
The installer assumed all coatings were safe for silicone sealants
The GC approved the submittal without confirming product-specific instructions
Consequences
78 units had to be removed and replaced
$142,000 in replacement and labor costs
Project delayed by four weeks and flagged by the architect’s risk committee
Process Changes Instituted
Sealant Compatibility Guidelines in All Submittals
Glass product documentation now includes a list of tested and approved sealants by product and coating.
Contractor Coordination Briefs Introduced
For custom units, installers must attend a distributor-led coordination call before materials arrive on site.
Coating Compatibility Field Cards for Installers
Jobsite packaging now includes quick-reference coating and handling guides to prevent improper materials usage.
Conclusion
Installation failure is rarely about bad labor—it’s about poor communication. The more detailed, specific, and visual your instructions are, the less likely a $1 part causes a $100,000 problem.
