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Apprentice Q&A · #028

When do I need to use isolation pads on my duct hangers?

1st YearHangers & SupportsRED · Stop / Verify

Isolation pads (vibration rubber/neoprene) are required when hanging ductwork in sound-sensitive commercial environments (like theaters, schools, or hospitals) or directly connected to high-vibration air handling equipment to stop acoustic transfer through the structure.

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Plain-English answer

Isolation pads (vibration rubber/neoprene) are required when hanging ductwork in sound-sensitive commercial environments (like theaters, schools, or hospitals) or directly connected to high-vibration air handling equipment to stop acoustic transfer through the structure.

Field checklist

Ask Foreman

Hey boss, I’m on hangers & supports and need verification before I touch this: When do I need to use isolation pads on my duct hangers? Do you want me to stop here and check the approved detail, submittal, or inspector/manufacturer requirement first?

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Verify before acting

Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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