Grease duct joints are held collectively by means of fashioned V clamps and sealed with 3M Fire Barrier 2000+. Fire resistant board for sealing services penetrations in walls or floors Stone wool insulation is fire resilient and may sluggish the distribute of flames, which can make the difference between a https://fire-resisting-ductwork-i46789.newsbloger.com/37762275/fire-resisting-ductwork-insulation-an-overview