A fire/smoke damper sleeve gap is packed with regular fiberglass
Regular insulation is not automatically an approved firestop. Stop cover, verify the listed assembly/firestop system, and replace improper packing with the approved material/detail.
Do not let a rated damper sleeve get buried with unverified packing around it.
Check
Confirm wall rating, damper type, sleeve, retaining angles, and gap condition.
Check the damper manufacturer installation sheet and approved firestop detail/submittal.
Identify whether the existing material is approved for that exact assembly.
Stop wall/shaft cover until the firestop condition is corrected and documented.
Take photos before and after correction for inspection/closeout.
Steps
Confirm wall rating, damper type, sleeve, retaining angles, and gap condition.
Check the damper manufacturer installation sheet and approved firestop detail/submittal.
Identify whether the existing material is approved for that exact assembly.
Stop wall/shaft cover until the firestop condition is corrected and documented.
Take photos before and after correction for inspection/closeout.
Say this to your foreman
The FSD sleeve at [location] has regular insulation packed around the wall gap. I checked the damper tag and wall rating. Do you want this removed and replaced per the approved firestop/listed assembly before cover?