04/08/2026
A new statewide ruling just changed how every mid-rise and high-rise condo in Florida handles window and door replacements.
Binding Interpretation 318 (BI 318), issued January 26 by the Florida Building Commission, now classifies window and door replacements in threshold buildings (3+ stories or 50+ feet) as structural system modifications. That means these projects now require a Threshold Inspector and a Structural Engineer of Record -- adding new compliance steps that most associations and contractors aren't prepared for.
At CSI, we've been performing threshold inspections and building envelope evaluations across Florida for over 30 years. Here's what building owners and managers need to know:
- Replacing windows or doors in a threshold building now triggers mandatory threshold inspection requirements
- A licensed Threshold Inspector must be designated before work begins
- A Structural Engineer of Record must provide sealed shop drawings
- Contractors must submit detailed installation procedures for engineering review
This affects every condo association, property manager, and contractor working on mid-rise and high-rise buildings in Florida.
Read our full breakdown on what BI 318 means for your building: https://csidesign.com/blog/window-door-replacements-in-threshold-buildings-now-require-threshold-inspections.html