Ductwork Insulation at Fire Damper
Insulation must be stopped at fire dampers to prevent fire spread through insulation.
What You Might Be Looking At
insulation being applied up to a fire damper in a rated wall
Apprentice words: insulation at damper, wrap around damper, fire damper insulation
Trade terms: fire damper insulation clearance, rated assembly insulation, damper insulation stop
Check First
What Not To Do
Don't insulate through fire damper sleeves. Don't assume insulation can pass through rated assemblies.
What can go wrong: Fire spread through insulation, wall rating compromised, code violation, inspector rejection, liability
Better Foreman Question
For this fire damper, should insulation stop at the damper? And how far from the damper should insulation end?
Verify With
Reference type: NFPA 90A, manufacturer install instructions
Source to verify: NFPA 90A Section 4.3, fire damper manufacturer installation guide
Safe wording: Insulation at fire dampers is a critical life safety detail.