Phenolic/pre-insulated duct panel
Lightweight indoor air distribution
Before you start
- Confirm the proprietary panel system, fire and smoke limitations, pressure class, approved fabrication tools, flange, tape, sealant, vapor-barrier details, and support method.
- Inspect panels for crushed foam, punctured facing, wet edges, delamination, and damaged corners.
- Verify the system is permitted for the location and service.
- Stage only the manufacturer-approved tapes, adhesives, flanges, and edge-protection components.
Tools and materials
Phenolic or pre-insulated duct panels, approved cutting and grooving tools, proprietary flanges, tapes, adhesives and sealants, corner tools, wide channel or trapeze supports, vapor-barrier repair materials, straightedge, square, and cleaning supplies.
Lay it out
- Lay out panels, folds, joints, reinforcement, access openings, and support positions using the system fabrication rules.
- Keep support points away from weak panel joints and provide enough bearing width.
- Plan vapor-barrier continuity at fittings, penetrations, and field cuts.
Set and support it
- Use wide channels or trapezes that do not crush the foam core.
- Support assembled sections before connecting long runs.
- Protect all exposed foam edges during lifting and installation.
Make the connection
- 1
Cut and groove panels with the approved tools.
- 2
Close longitudinal seams and corners square.
- 3
Install the proprietary flange, tape, adhesive, or sealant system in the required order.
- 4
Connect sections without crushing the panel edge.
- 5
Restore the vapor barrier at every cut, penetration, and joint.
- 6
Set the duct on wide supports and verify the panel remains flat.
- 7
Inspect for open corners, loose tape, exposed foam, or crushed areas.
Check the install
- The vapor barrier is continuous.
- Corners and sections remain square.
- No foam edge is exposed or crushed.
- Only approved proprietary components are used.
- Supports provide broad, even bearing.
Common mistakes
- Using ordinary foil tape or sealant instead of the system components.
- Overtightening supports and crushing the panel.
- Leaving foam exposed at a cut edge.
- Using the system in a prohibited fire, smoke, exterior, or high-pressure application.
Stop and ask
Stop if the system is not approved for the fire, smoke, pressure, temperature, or location condition, or if the proprietary installation instructions and materials are unavailable.