Recommending Repair vs. Removal for Friable Duct Insulation

Repair/encapsulation is lower cost and less disruptive and can be appropriate for intact material with limited damage, but it leaves the material in place and requires ongoing surveillance; encapsulation of internal duct insulation can be difficult to inspect and may not withstand future HVAC work. Removal eliminates the hazard and the future disturbance risk, but is more costly and disruptive and must be done with containment and proper work practices. Given the tears at access panels, the high-occupancy children's program, and the likelihood of HVAC replacement within three years, removal during the HVAC project may be the more durable choice; if removal is deferred, repair plus strict access control and surveillance is the interim path.

Seal or repair the tears at access panels, restrict access to the affected duct areas, ensure the HVAC system does not draw air from the affected zone without filtration, wet-clean any debris, and schedule surveillance. Staff and contractors must be notified before any work near the ducts, and the access panels should be secured so children and staff do not disturb the material. These measures apply whether the board chooses repair or removal.

I would present the facts: condition (intact with localized damage), occupancy (children, five days a week), and the planned HVAC replacement within three years. I would lay out two options with costs, disruption, and long-term obligations: (1) repair/encapsulation now with interim controls and surveillance, revisiting removal at HVAC replacement; (2) removal now or coordinated with the HVAC project. I would recommend coordinating removal with the HVAC project if the schedule allows, with interim repair and access control in the meantime, because it avoids doing the work twice and eliminates the hazard. The plan should record the decision, the interim measures, and the surveillance schedule.